/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:23:39,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:23:39,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:23:39,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:23:39,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:23:39,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:23:39,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:23:39,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:23:39,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:23:39,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:23:39,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:23:39,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:23:39,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:23:39,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:23:39,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:23:39,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:23:39,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:23:39,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:23:39,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:23:39,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:23:39,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:23:39,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:23:39,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:23:39,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:23:39,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 04:23:39,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:23:39,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:23:39,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:23:39,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 04:23:39,238 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:23:39,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:23:39,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:23:39,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:23:39,240 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:23:39,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:23:39,244 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:23:39,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:23:39,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:23:39,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:23:39,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:23:39,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:23:39,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:23:39,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:23:39,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:23:39,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:23:39,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:23:39,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:23:39,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:23:39,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:23:39,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:23:39,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:23:39,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:23:39,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:23:39,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:23:39,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:23:39,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:23:39,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:23:39,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:23:39,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:23:39,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:23:39,592 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:23:39,595 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:23:39,597 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:23:39,597 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:23:39,598 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-19 04:23:39,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79eddba03/be8e3a6139214215bedb7927cbbaaf01/FLAG97d83238e [2020-08-19 04:23:40,137 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:23:40,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-19 04:23:40,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79eddba03/be8e3a6139214215bedb7927cbbaaf01/FLAG97d83238e [2020-08-19 04:23:40,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/79eddba03/be8e3a6139214215bedb7927cbbaaf01 [2020-08-19 04:23:40,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:23:40,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:23:40,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:23:40,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:23:40,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:23:40,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:23:40" (1/1) ... [2020-08-19 04:23:40,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249e641f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40, skipping insertion in model container [2020-08-19 04:23:40,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:23:40" (1/1) ... [2020-08-19 04:23:40,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:23:40,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:23:40,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:23:40,720 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:23:40,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:23:40,757 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:23:40,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40 WrapperNode [2020-08-19 04:23:40,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:23:40,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:23:40,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:23:40,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:23:40,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40" (1/1) ... [2020-08-19 04:23:40,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40" (1/1) ... [2020-08-19 04:23:40,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40" (1/1) ... [2020-08-19 04:23:40,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40" (1/1) ... [2020-08-19 04:23:40,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40" (1/1) ... [2020-08-19 04:23:40,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40" (1/1) ... [2020-08-19 04:23:40,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40" (1/1) ... [2020-08-19 04:23:40,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:23:40,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:23:40,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:23:40,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:23:40,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:23:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:23:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:23:40,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:23:40,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:23:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:23:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:23:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:23:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:23:41,193 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:23:41,193 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 04:23:41,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:23:41 BoogieIcfgContainer [2020-08-19 04:23:41,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:23:41,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:23:41,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:23:41,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:23:41,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:23:40" (1/3) ... [2020-08-19 04:23:41,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4977ebd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:23:41, skipping insertion in model container [2020-08-19 04:23:41,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:23:40" (2/3) ... [2020-08-19 04:23:41,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4977ebd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:23:41, skipping insertion in model container [2020-08-19 04:23:41,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:23:41" (3/3) ... [2020-08-19 04:23:41,207 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-19 04:23:41,218 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:23:41,229 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:23:41,255 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:23:41,284 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:23:41,284 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:23:41,285 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:23:41,285 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:23:41,285 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:23:41,285 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:23:41,285 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:23:41,285 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:23:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-19 04:23:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 04:23:41,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:41,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:41,319 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:41,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:41,326 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-19 04:23:41,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:41,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079676426] [2020-08-19 04:23:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:41,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:41,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079676426] [2020-08-19 04:23:41,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:41,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:41,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256254777] [2020-08-19 04:23:41,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:41,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:41,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:41,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:41,559 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-19 04:23:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:41,624 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-19 04:23:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:41,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 04:23:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:41,637 INFO L225 Difference]: With dead ends: 75 [2020-08-19 04:23:41,637 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 04:23:41,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 04:23:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-19 04:23:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 04:23:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-19 04:23:41,685 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-19 04:23:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:41,686 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-19 04:23:41,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-19 04:23:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 04:23:41,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:41,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:41,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:23:41,689 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-19 04:23:41,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:41,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285292966] [2020-08-19 04:23:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:41,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:41,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285292966] [2020-08-19 04:23:41,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:41,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:41,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115111795] [2020-08-19 04:23:41,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:41,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:41,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:41,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:41,755 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-19 04:23:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:41,784 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-19 04:23:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:41,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 04:23:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:41,787 INFO L225 Difference]: With dead ends: 97 [2020-08-19 04:23:41,787 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 04:23:41,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 04:23:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-19 04:23:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-19 04:23:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-19 04:23:41,800 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-19 04:23:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:41,801 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-19 04:23:41,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:41,801 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-19 04:23:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:23:41,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:41,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:41,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:23:41,803 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:41,804 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-19 04:23:41,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:41,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862500134] [2020-08-19 04:23:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:41,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:41,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862500134] [2020-08-19 04:23:41,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:41,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:41,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723122716] [2020-08-19 04:23:41,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:41,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:41,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:41,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:41,870 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-19 04:23:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:41,907 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-19 04:23:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:41,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 04:23:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:41,910 INFO L225 Difference]: With dead ends: 90 [2020-08-19 04:23:41,910 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 04:23:41,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 04:23:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-19 04:23:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 04:23:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-19 04:23:41,932 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-19 04:23:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:41,933 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-19 04:23:41,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-19 04:23:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:23:41,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:41,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:41,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:23:41,937 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:41,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:41,938 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-19 04:23:41,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:41,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12515382] [2020-08-19 04:23:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12515382] [2020-08-19 04:23:42,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643235738] [2020-08-19 04:23:42,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,026 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-19 04:23:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,045 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-19 04:23:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 04:23:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,048 INFO L225 Difference]: With dead ends: 112 [2020-08-19 04:23:42,048 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 04:23:42,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 04:23:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-19 04:23:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-19 04:23:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-19 04:23:42,061 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-19 04:23:42,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,061 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-19 04:23:42,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,062 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-19 04:23:42,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 04:23:42,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:23:42,064 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-19 04:23:42,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334448795] [2020-08-19 04:23:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334448795] [2020-08-19 04:23:42,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073578448] [2020-08-19 04:23:42,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,137 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-19 04:23:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,177 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-19 04:23:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 04:23:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,180 INFO L225 Difference]: With dead ends: 184 [2020-08-19 04:23:42,180 INFO L226 Difference]: Without dead ends: 112 [2020-08-19 04:23:42,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-19 04:23:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-19 04:23:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-19 04:23:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-19 04:23:42,194 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-19 04:23:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,195 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-19 04:23:42,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-19 04:23:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:23:42,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:23:42,197 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,198 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-19 04:23:42,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200031463] [2020-08-19 04:23:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200031463] [2020-08-19 04:23:42,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819390497] [2020-08-19 04:23:42,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,245 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-19 04:23:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,270 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-19 04:23:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 04:23:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,272 INFO L225 Difference]: With dead ends: 165 [2020-08-19 04:23:42,273 INFO L226 Difference]: Without dead ends: 114 [2020-08-19 04:23:42,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-19 04:23:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-19 04:23:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-19 04:23:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-19 04:23:42,295 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-19 04:23:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,296 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-19 04:23:42,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,296 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-19 04:23:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:23:42,298 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:23:42,299 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,300 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-19 04:23:42,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341265127] [2020-08-19 04:23:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341265127] [2020-08-19 04:23:42,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003284090] [2020-08-19 04:23:42,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,354 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-19 04:23:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,385 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-19 04:23:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 04:23:42,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,388 INFO L225 Difference]: With dead ends: 204 [2020-08-19 04:23:42,388 INFO L226 Difference]: Without dead ends: 202 [2020-08-19 04:23:42,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-19 04:23:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-19 04:23:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-19 04:23:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-19 04:23:42,401 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-19 04:23:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,402 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-19 04:23:42,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,402 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-19 04:23:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 04:23:42,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 04:23:42,404 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-19 04:23:42,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073567743] [2020-08-19 04:23:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073567743] [2020-08-19 04:23:42,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33088888] [2020-08-19 04:23:42,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,435 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-19 04:23:42,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,455 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-19 04:23:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 04:23:42,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,458 INFO L225 Difference]: With dead ends: 352 [2020-08-19 04:23:42,458 INFO L226 Difference]: Without dead ends: 210 [2020-08-19 04:23:42,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-19 04:23:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-19 04:23:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-19 04:23:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-19 04:23:42,484 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-19 04:23:42,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,484 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-19 04:23:42,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,484 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-19 04:23:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:23:42,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 04:23:42,487 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,487 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-19 04:23:42,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026139121] [2020-08-19 04:23:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026139121] [2020-08-19 04:23:42,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429812274] [2020-08-19 04:23:42,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,550 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-19 04:23:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,584 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-19 04:23:42,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 04:23:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,587 INFO L225 Difference]: With dead ends: 312 [2020-08-19 04:23:42,587 INFO L226 Difference]: Without dead ends: 214 [2020-08-19 04:23:42,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-19 04:23:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-19 04:23:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-19 04:23:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-19 04:23:42,613 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-19 04:23:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,613 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-19 04:23:42,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-19 04:23:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:23:42,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 04:23:42,616 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,624 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-19 04:23:42,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270094431] [2020-08-19 04:23:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270094431] [2020-08-19 04:23:42,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308323615] [2020-08-19 04:23:42,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,672 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-19 04:23:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,706 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-19 04:23:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,710 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 04:23:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,713 INFO L225 Difference]: With dead ends: 380 [2020-08-19 04:23:42,713 INFO L226 Difference]: Without dead ends: 378 [2020-08-19 04:23:42,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-19 04:23:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-19 04:23:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-19 04:23:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-19 04:23:42,727 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-19 04:23:42,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,728 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-19 04:23:42,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-19 04:23:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:23:42,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 04:23:42,732 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,737 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-19 04:23:42,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044722708] [2020-08-19 04:23:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044722708] [2020-08-19 04:23:42,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153766772] [2020-08-19 04:23:42,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,774 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-19 04:23:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,802 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-19 04:23:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 04:23:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,805 INFO L225 Difference]: With dead ends: 684 [2020-08-19 04:23:42,805 INFO L226 Difference]: Without dead ends: 402 [2020-08-19 04:23:42,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-19 04:23:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-19 04:23:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-19 04:23:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-19 04:23:42,823 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-19 04:23:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,823 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-19 04:23:42,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-19 04:23:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:23:42,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 04:23:42,825 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-19 04:23:42,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241195817] [2020-08-19 04:23:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241195817] [2020-08-19 04:23:42,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711094779] [2020-08-19 04:23:42,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,852 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-19 04:23:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,870 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-19 04:23:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 04:23:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,873 INFO L225 Difference]: With dead ends: 600 [2020-08-19 04:23:42,873 INFO L226 Difference]: Without dead ends: 410 [2020-08-19 04:23:42,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-19 04:23:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-19 04:23:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-19 04:23:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-19 04:23:42,888 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-19 04:23:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,889 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-19 04:23:42,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-19 04:23:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:23:42,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 04:23:42,891 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-19 04:23:42,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312057760] [2020-08-19 04:23:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312057760] [2020-08-19 04:23:42,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024951634] [2020-08-19 04:23:42,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,914 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-19 04:23:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:42,938 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-19 04:23:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:42,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 04:23:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:42,942 INFO L225 Difference]: With dead ends: 716 [2020-08-19 04:23:42,942 INFO L226 Difference]: Without dead ends: 714 [2020-08-19 04:23:42,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-19 04:23:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-19 04:23:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-19 04:23:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-19 04:23:42,962 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-19 04:23:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:42,963 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-19 04:23:42,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-19 04:23:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:23:42,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:42,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:42,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 04:23:42,965 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:42,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-19 04:23:42,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:42,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657546922] [2020-08-19 04:23:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:42,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657546922] [2020-08-19 04:23:42,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:42,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:42,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039405883] [2020-08-19 04:23:42,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:42,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:42,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:42,987 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-19 04:23:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,014 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-19 04:23:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 04:23:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,019 INFO L225 Difference]: With dead ends: 1340 [2020-08-19 04:23:43,019 INFO L226 Difference]: Without dead ends: 778 [2020-08-19 04:23:43,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-19 04:23:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-19 04:23:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-19 04:23:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-19 04:23:43,050 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-19 04:23:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,051 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-19 04:23:43,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-19 04:23:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 04:23:43,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:43,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 04:23:43,053 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-19 04:23:43,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941774656] [2020-08-19 04:23:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941774656] [2020-08-19 04:23:43,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807303818] [2020-08-19 04:23:43,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,078 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-19 04:23:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,106 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-19 04:23:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 04:23:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,111 INFO L225 Difference]: With dead ends: 1164 [2020-08-19 04:23:43,111 INFO L226 Difference]: Without dead ends: 794 [2020-08-19 04:23:43,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-19 04:23:43,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-19 04:23:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-19 04:23:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-19 04:23:43,158 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-19 04:23:43,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,158 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-19 04:23:43,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,158 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-19 04:23:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 04:23:43,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:43,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 04:23:43,160 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-19 04:23:43,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327817560] [2020-08-19 04:23:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327817560] [2020-08-19 04:23:43,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244944653] [2020-08-19 04:23:43,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,184 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-19 04:23:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,214 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-19 04:23:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 04:23:43,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,221 INFO L225 Difference]: With dead ends: 1356 [2020-08-19 04:23:43,221 INFO L226 Difference]: Without dead ends: 1354 [2020-08-19 04:23:43,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-19 04:23:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-19 04:23:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-19 04:23:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-19 04:23:43,258 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-19 04:23:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,258 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-19 04:23:43,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-19 04:23:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 04:23:43,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:43,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 04:23:43,262 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-19 04:23:43,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388789523] [2020-08-19 04:23:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388789523] [2020-08-19 04:23:43,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625050814] [2020-08-19 04:23:43,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,282 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-19 04:23:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,322 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-19 04:23:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 04:23:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,330 INFO L225 Difference]: With dead ends: 2636 [2020-08-19 04:23:43,330 INFO L226 Difference]: Without dead ends: 1514 [2020-08-19 04:23:43,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-19 04:23:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-19 04:23:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-19 04:23:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-19 04:23:43,379 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-19 04:23:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,379 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-19 04:23:43,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-19 04:23:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 04:23:43,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:43,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 04:23:43,383 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-19 04:23:43,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395293014] [2020-08-19 04:23:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395293014] [2020-08-19 04:23:43,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567807563] [2020-08-19 04:23:43,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,403 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-19 04:23:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,443 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-19 04:23:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 04:23:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,451 INFO L225 Difference]: With dead ends: 2268 [2020-08-19 04:23:43,451 INFO L226 Difference]: Without dead ends: 1546 [2020-08-19 04:23:43,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-19 04:23:43,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-19 04:23:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-19 04:23:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-19 04:23:43,500 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-19 04:23:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,500 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-19 04:23:43,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-19 04:23:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 04:23:43,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:43,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 04:23:43,504 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-19 04:23:43,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083094177] [2020-08-19 04:23:43,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083094177] [2020-08-19 04:23:43,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196921088] [2020-08-19 04:23:43,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,525 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-19 04:23:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,595 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-19 04:23:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 04:23:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,611 INFO L225 Difference]: With dead ends: 2572 [2020-08-19 04:23:43,612 INFO L226 Difference]: Without dead ends: 2570 [2020-08-19 04:23:43,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-19 04:23:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-19 04:23:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-19 04:23:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-19 04:23:43,721 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-19 04:23:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,721 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-19 04:23:43,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-19 04:23:43,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 04:23:43,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:43,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:43,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 04:23:43,729 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:43,729 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-19 04:23:43,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:43,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391066383] [2020-08-19 04:23:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:43,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391066383] [2020-08-19 04:23:43,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:43,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:43,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851255903] [2020-08-19 04:23:43,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:43,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:43,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:43,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,772 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-19 04:23:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:43,881 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-19 04:23:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:43,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 04:23:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:43,895 INFO L225 Difference]: With dead ends: 5196 [2020-08-19 04:23:43,895 INFO L226 Difference]: Without dead ends: 2954 [2020-08-19 04:23:43,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-19 04:23:43,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-19 04:23:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-19 04:23:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-19 04:23:43,998 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-19 04:23:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:43,998 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-19 04:23:43,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-19 04:23:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 04:23:44,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:44,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:44,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 04:23:44,005 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:44,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:44,006 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-19 04:23:44,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:44,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789684357] [2020-08-19 04:23:44,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:44,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789684357] [2020-08-19 04:23:44,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:44,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:44,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568807508] [2020-08-19 04:23:44,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:44,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:44,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:44,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,028 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-19 04:23:44,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:44,089 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-19 04:23:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:44,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 04:23:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:44,103 INFO L225 Difference]: With dead ends: 4428 [2020-08-19 04:23:44,104 INFO L226 Difference]: Without dead ends: 3018 [2020-08-19 04:23:44,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-19 04:23:44,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-19 04:23:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-19 04:23:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-19 04:23:44,220 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-19 04:23:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:44,220 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-19 04:23:44,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-19 04:23:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 04:23:44,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:44,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:44,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 04:23:44,225 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:44,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:44,226 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-19 04:23:44,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:44,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890295440] [2020-08-19 04:23:44,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:44,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890295440] [2020-08-19 04:23:44,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:44,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:44,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797899421] [2020-08-19 04:23:44,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:44,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:44,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:44,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,259 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-19 04:23:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:44,360 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-19 04:23:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:44,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 04:23:44,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:44,374 INFO L225 Difference]: With dead ends: 8650 [2020-08-19 04:23:44,374 INFO L226 Difference]: Without dead ends: 3016 [2020-08-19 04:23:44,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-19 04:23:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-19 04:23:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-19 04:23:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-19 04:23:44,470 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-19 04:23:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:44,471 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-19 04:23:44,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-19 04:23:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 04:23:44,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:23:44,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 04:23:44,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 04:23:44,478 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:23:44,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:23:44,478 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-19 04:23:44,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:23:44,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68270710] [2020-08-19 04:23:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:23:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:23:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:23:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:23:44,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68270710] [2020-08-19 04:23:44,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:23:44,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:23:44,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738969052] [2020-08-19 04:23:44,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:23:44,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:23:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:23:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,499 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-19 04:23:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:23:44,552 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-19 04:23:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:23:44,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 04:23:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:23:44,553 INFO L225 Difference]: With dead ends: 3016 [2020-08-19 04:23:44,553 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 04:23:44,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:23:44,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 04:23:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 04:23:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 04:23:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 04:23:44,559 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-19 04:23:44,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:23:44,560 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 04:23:44,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:23:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 04:23:44,560 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 04:23:44,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 04:23:44,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 04:23:44,591 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 04:23:44,591 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:23:44,591 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 04:23:44,591 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 04:23:44,591 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 04:23:44,591 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 04:23:44,592 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-19 04:23:44,592 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-19 04:23:44,592 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,592 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-19 04:23:44,592 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,592 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-19 04:23:44,592 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,592 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,592 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-19 04:23:44,593 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-19 04:23:44,593 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-19 04:23:44,593 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-19 04:23:44,593 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-19 04:23:44,593 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,593 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,593 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,594 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,594 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-19 04:23:44,594 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,594 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-19 04:23:44,594 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-19 04:23:44,594 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,594 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,594 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-19 04:23:44,594 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-19 04:23:44,595 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,595 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-19 04:23:44,595 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,595 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,595 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-19 04:23:44,595 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-19 04:23:44,595 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-19 04:23:44,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:23:44 BoogieIcfgContainer [2020-08-19 04:23:44,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:23:44,612 INFO L168 Benchmark]: Toolchain (without parser) took 4123.71 ms. Allocated memory was 142.1 MB in the beginning and 280.5 MB in the end (delta: 138.4 MB). Free memory was 105.6 MB in the beginning and 132.8 MB in the end (delta: -27.2 MB). Peak memory consumption was 111.2 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:44,613 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 04:23:44,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.62 ms. Allocated memory is still 142.1 MB. Free memory was 105.4 MB in the beginning and 94.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:44,615 INFO L168 Benchmark]: Boogie Preprocessor took 109.91 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 94.9 MB in the beginning and 182.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:44,615 INFO L168 Benchmark]: RCFGBuilder took 329.98 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 164.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:44,616 INFO L168 Benchmark]: TraceAbstraction took 3409.90 ms. Allocated memory was 203.9 MB in the beginning and 280.5 MB in the end (delta: 76.5 MB). Free memory was 163.7 MB in the beginning and 132.8 MB in the end (delta: 30.8 MB). Peak memory consumption was 107.4 MB. Max. memory is 7.1 GB. [2020-08-19 04:23:44,627 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.62 ms. Allocated memory is still 142.1 MB. Free memory was 105.4 MB in the beginning and 94.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.91 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 94.9 MB in the beginning and 182.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.98 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 164.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3409.90 ms. Allocated memory was 203.9 MB in the beginning and 280.5 MB in the end (delta: 76.5 MB). Free memory was 163.7 MB in the beginning and 132.8 MB in the end (delta: 30.8 MB). Peak memory consumption was 107.4 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: 3.2s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.1s, 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: 0.8s 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...