/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:46:32,413 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 02:46:32,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:46:32,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:46:32,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:46:32,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:46:32,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:46:32,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:46:32,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:46:32,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:46:32,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:46:32,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:46:32,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:46:32,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:46:32,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:46:32,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:46:32,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:46:32,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:46:32,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:46:32,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:46:32,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:46:32,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:46:32,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:46:32,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:46:32,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:46:32,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:46:32,527 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 02:46:32,573 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:46:32,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:46:32,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:46:32,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:46:32,575 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:46:32,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:46:32,576 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:46:32,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:46:32,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:46:32,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:46:32,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:46:32,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:46:32,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:46:32,578 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:46:32,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:46:32,579 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:46:32,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:46:32,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:46:32,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:46:32,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:46:32,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:46:32,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:46:32,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:46:32,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:46:32,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:46:32,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:46:32,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:46:32,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:46:32,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:46:32,582 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=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:46:32,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:46:32,882 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:46:32,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:46:32,886 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:46:32,887 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:46:32,888 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 02:46:32,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23b885eba/60169d2feb2e490f9d9d912de9f67bf0/FLAGd58a30c3f [2020-08-19 02:46:33,448 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:46:33,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 02:46:33,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23b885eba/60169d2feb2e490f9d9d912de9f67bf0/FLAGd58a30c3f [2020-08-19 02:46:33,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/23b885eba/60169d2feb2e490f9d9d912de9f67bf0 [2020-08-19 02:46:33,797 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:46:33,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:46:33,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:46:33,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:46:33,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:46:33,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:46:33" (1/1) ... [2020-08-19 02:46:33,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a03fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:33, skipping insertion in model container [2020-08-19 02:46:33,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:46:33" (1/1) ... [2020-08-19 02:46:33,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:46:33,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:46:34,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:46:34,009 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:46:34,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:46:34,055 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:46:34,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:34 WrapperNode [2020-08-19 02:46:34,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:46:34,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:46:34,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:46:34,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:46:34,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:34" (1/1) ... [2020-08-19 02:46:34,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:34" (1/1) ... [2020-08-19 02:46:34,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:34" (1/1) ... [2020-08-19 02:46:34,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:34" (1/1) ... [2020-08-19 02:46:34,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:34" (1/1) ... [2020-08-19 02:46:34,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:34" (1/1) ... [2020-08-19 02:46:34,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:34" (1/1) ... [2020-08-19 02:46:34,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:46:34,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:46:34,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:46:34,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:46:34,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:34" (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 02:46:34,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:46:34,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:46:34,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:46:34,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:46:34,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:46:34,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:46:34,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:46:34,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:46:34,567 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:46:34,567 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 02:46:34,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:46:34 BoogieIcfgContainer [2020-08-19 02:46:34,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:46:34,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:46:34,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:46:34,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:46:34,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:46:33" (1/3) ... [2020-08-19 02:46:34,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5603234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:46:34, skipping insertion in model container [2020-08-19 02:46:34,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:34" (2/3) ... [2020-08-19 02:46:34,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5603234c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:46:34, skipping insertion in model container [2020-08-19 02:46:34,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:46:34" (3/3) ... [2020-08-19 02:46:34,580 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-19 02:46:34,591 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:46:34,601 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:46:34,622 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:46:34,677 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:46:34,677 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:46:34,678 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:46:34,678 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:46:34,678 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:46:34,678 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:46:34,678 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:46:34,678 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:46:34,702 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-19 02:46:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 02:46:34,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:34,710 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 02:46:34,711 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:34,719 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-19 02:46:34,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:34,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776333676] [2020-08-19 02:46:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:34,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:34,957 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 02:46:34,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776333676] [2020-08-19 02:46:34,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:34,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:34,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692161860] [2020-08-19 02:46:34,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:34,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:34,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:34,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:34,993 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-19 02:46:35,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:35,084 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-19 02:46:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:35,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 02:46:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:35,100 INFO L225 Difference]: With dead ends: 93 [2020-08-19 02:46:35,100 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 02:46:35,104 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 02:46:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 02:46:35,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-19 02:46:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 02:46:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-19 02:46:35,153 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-19 02:46:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:35,154 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-19 02:46:35,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-19 02:46:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 02:46:35,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:35,156 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 02:46:35,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:46:35,157 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-19 02:46:35,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:35,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4734764] [2020-08-19 02:46:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,235 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 02:46:35,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4734764] [2020-08-19 02:46:35,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:35,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:35,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364944229] [2020-08-19 02:46:35,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:35,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:35,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:35,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:35,239 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-19 02:46:35,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:35,299 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-19 02:46:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:35,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 02:46:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:35,304 INFO L225 Difference]: With dead ends: 127 [2020-08-19 02:46:35,306 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 02:46:35,308 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 02:46:35,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 02:46:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-19 02:46:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 02:46:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-19 02:46:35,328 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-19 02:46:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:35,329 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-19 02:46:35,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-19 02:46:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:46:35,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:35,332 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 02:46:35,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:46:35,333 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:35,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-19 02:46:35,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:35,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150993173] [2020-08-19 02:46:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,413 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 02:46:35,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150993173] [2020-08-19 02:46:35,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:35,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:35,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932806448] [2020-08-19 02:46:35,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:35,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:35,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:35,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:35,416 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-19 02:46:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:35,437 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-19 02:46:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:35,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 02:46:35,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:35,439 INFO L225 Difference]: With dead ends: 117 [2020-08-19 02:46:35,439 INFO L226 Difference]: Without dead ends: 81 [2020-08-19 02:46:35,440 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 02:46:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-19 02:46:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-19 02:46:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 02:46:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-19 02:46:35,451 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-19 02:46:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:35,451 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-19 02:46:35,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:35,452 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-19 02:46:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:46:35,453 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:35,453 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 02:46:35,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:46:35,454 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:35,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:35,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-19 02:46:35,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:35,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751631563] [2020-08-19 02:46:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,506 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 02:46:35,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751631563] [2020-08-19 02:46:35,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:35,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:35,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001654446] [2020-08-19 02:46:35,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:35,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:35,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:35,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:35,509 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-19 02:46:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:35,528 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-19 02:46:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:35,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 02:46:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:35,531 INFO L225 Difference]: With dead ends: 148 [2020-08-19 02:46:35,531 INFO L226 Difference]: Without dead ends: 146 [2020-08-19 02:46:35,532 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 02:46:35,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-19 02:46:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-19 02:46:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-19 02:46:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-19 02:46:35,544 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-19 02:46:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:35,545 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-19 02:46:35,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-19 02:46:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:46:35,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:35,546 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 02:46:35,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:46:35,547 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:35,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:35,548 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-19 02:46:35,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:35,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498132006] [2020-08-19 02:46:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,591 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 02:46:35,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498132006] [2020-08-19 02:46:35,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:35,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:35,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324600496] [2020-08-19 02:46:35,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:35,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:35,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:35,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:35,594 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-19 02:46:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:35,626 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-19 02:46:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:35,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 02:46:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:35,628 INFO L225 Difference]: With dead ends: 244 [2020-08-19 02:46:35,628 INFO L226 Difference]: Without dead ends: 148 [2020-08-19 02:46:35,629 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 02:46:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-19 02:46:35,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-19 02:46:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-19 02:46:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-19 02:46:35,644 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-19 02:46:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:35,644 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-19 02:46:35,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-19 02:46:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 02:46:35,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:35,646 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 02:46:35,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:46:35,647 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:35,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:35,647 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-19 02:46:35,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:35,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730143496] [2020-08-19 02:46:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:35,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730143496] [2020-08-19 02:46:35,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:35,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:35,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657669458] [2020-08-19 02:46:35,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:35,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:35,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:35,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:35,712 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-19 02:46:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:35,755 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-19 02:46:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:35,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 02:46:35,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:35,759 INFO L225 Difference]: With dead ends: 219 [2020-08-19 02:46:35,759 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 02:46:35,760 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 02:46:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 02:46:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-19 02:46:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-19 02:46:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-19 02:46:35,786 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-19 02:46:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:35,786 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-19 02:46:35,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-19 02:46:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 02:46:35,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:35,788 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 02:46:35,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:46:35,789 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:35,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-19 02:46:35,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:35,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007792939] [2020-08-19 02:46:35,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,865 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 02:46:35,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007792939] [2020-08-19 02:46:35,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:35,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:35,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649267186] [2020-08-19 02:46:35,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:35,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:35,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:35,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:35,869 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-19 02:46:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:35,898 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-19 02:46:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:35,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 02:46:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:35,903 INFO L225 Difference]: With dead ends: 276 [2020-08-19 02:46:35,903 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 02:46:35,904 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 02:46:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 02:46:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-19 02:46:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-19 02:46:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-19 02:46:35,934 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-19 02:46:35,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:35,935 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-19 02:46:35,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:35,935 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-19 02:46:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 02:46:35,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:35,938 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 02:46:35,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:46:35,939 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-19 02:46:35,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:35,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792806095] [2020-08-19 02:46:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:35,991 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 02:46:35,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792806095] [2020-08-19 02:46:35,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:35,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:35,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043165285] [2020-08-19 02:46:35,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:35,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:35,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:35,994 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-19 02:46:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:36,017 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-19 02:46:36,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:36,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 02:46:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:36,020 INFO L225 Difference]: With dead ends: 472 [2020-08-19 02:46:36,020 INFO L226 Difference]: Without dead ends: 282 [2020-08-19 02:46:36,022 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 02:46:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-19 02:46:36,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-19 02:46:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-19 02:46:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-19 02:46:36,036 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-19 02:46:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:36,037 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-19 02:46:36,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-19 02:46:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 02:46:36,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:36,039 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 02:46:36,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:46:36,039 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:36,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-19 02:46:36,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:36,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605500337] [2020-08-19 02:46:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,067 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 02:46:36,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605500337] [2020-08-19 02:46:36,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:36,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:36,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465963497] [2020-08-19 02:46:36,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:36,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:36,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:36,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:36,069 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-19 02:46:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:36,090 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-19 02:46:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:36,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 02:46:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:36,093 INFO L225 Difference]: With dead ends: 420 [2020-08-19 02:46:36,093 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 02:46:36,094 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 02:46:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 02:46:36,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-19 02:46:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-19 02:46:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-19 02:46:36,107 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-19 02:46:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:36,107 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-19 02:46:36,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-19 02:46:36,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 02:46:36,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:36,109 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 02:46:36,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:46:36,109 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:36,110 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-19 02:46:36,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:36,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260488690] [2020-08-19 02:46:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,137 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 02:46:36,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260488690] [2020-08-19 02:46:36,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:36,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:36,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116745227] [2020-08-19 02:46:36,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:36,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:36,140 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-19 02:46:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:36,161 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-19 02:46:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:36,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 02:46:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:36,165 INFO L225 Difference]: With dead ends: 524 [2020-08-19 02:46:36,166 INFO L226 Difference]: Without dead ends: 522 [2020-08-19 02:46:36,166 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 02:46:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-19 02:46:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-19 02:46:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-19 02:46:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-19 02:46:36,184 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-19 02:46:36,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:36,185 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-19 02:46:36,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:36,185 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-19 02:46:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 02:46:36,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:36,186 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 02:46:36,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:46:36,187 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:36,187 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-19 02:46:36,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:36,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975037109] [2020-08-19 02:46:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,214 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 02:46:36,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975037109] [2020-08-19 02:46:36,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:36,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:36,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099932002] [2020-08-19 02:46:36,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:36,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:36,217 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-19 02:46:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:36,242 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-19 02:46:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:36,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 02:46:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:36,247 INFO L225 Difference]: With dead ends: 924 [2020-08-19 02:46:36,248 INFO L226 Difference]: Without dead ends: 546 [2020-08-19 02:46:36,249 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 02:46:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-19 02:46:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-19 02:46:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-19 02:46:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-19 02:46:36,268 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-19 02:46:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:36,268 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-19 02:46:36,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-19 02:46:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 02:46:36,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:36,270 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 02:46:36,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:46:36,270 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:36,271 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-19 02:46:36,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:36,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939400803] [2020-08-19 02:46:36,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,296 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 02:46:36,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939400803] [2020-08-19 02:46:36,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:36,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:36,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947175886] [2020-08-19 02:46:36,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:36,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:36,298 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-19 02:46:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:36,324 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-19 02:46:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:36,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 02:46:36,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:36,328 INFO L225 Difference]: With dead ends: 816 [2020-08-19 02:46:36,328 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 02:46:36,329 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 02:46:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 02:46:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-19 02:46:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-19 02:46:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-19 02:46:36,345 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-19 02:46:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:36,346 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-19 02:46:36,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-19 02:46:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 02:46:36,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:36,347 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 02:46:36,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:46:36,348 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:36,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-19 02:46:36,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:36,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030922712] [2020-08-19 02:46:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,374 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 02:46:36,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030922712] [2020-08-19 02:46:36,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:36,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:36,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356268226] [2020-08-19 02:46:36,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:36,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:36,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:36,377 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-19 02:46:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:36,402 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-19 02:46:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:36,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 02:46:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:36,409 INFO L225 Difference]: With dead ends: 1004 [2020-08-19 02:46:36,409 INFO L226 Difference]: Without dead ends: 1002 [2020-08-19 02:46:36,410 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 02:46:36,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-19 02:46:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-19 02:46:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-19 02:46:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-19 02:46:36,437 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-19 02:46:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:36,438 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-19 02:46:36,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-19 02:46:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 02:46:36,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:36,440 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 02:46:36,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 02:46:36,441 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:36,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-19 02:46:36,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:36,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253187126] [2020-08-19 02:46:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,466 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 02:46:36,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253187126] [2020-08-19 02:46:36,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:36,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:36,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132958737] [2020-08-19 02:46:36,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:36,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:36,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:36,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:36,468 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-19 02:46:36,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:36,501 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-19 02:46:36,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:36,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 02:46:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:36,508 INFO L225 Difference]: With dead ends: 1820 [2020-08-19 02:46:36,508 INFO L226 Difference]: Without dead ends: 1066 [2020-08-19 02:46:36,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-19 02:46:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-19 02:46:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-19 02:46:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-19 02:46:36,558 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-19 02:46:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:36,559 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-19 02:46:36,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-19 02:46:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 02:46:36,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:36,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:36,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 02:46:36,562 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:36,562 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-19 02:46:36,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:36,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536295300] [2020-08-19 02:46:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,599 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 02:46:36,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536295300] [2020-08-19 02:46:36,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:36,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:36,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697860504] [2020-08-19 02:46:36,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:36,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:36,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:36,601 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-19 02:46:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:36,633 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-19 02:46:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:36,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 02:46:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:36,640 INFO L225 Difference]: With dead ends: 1596 [2020-08-19 02:46:36,640 INFO L226 Difference]: Without dead ends: 1082 [2020-08-19 02:46:36,644 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 02:46:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-19 02:46:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-19 02:46:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-19 02:46:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-19 02:46:36,678 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-19 02:46:36,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:36,679 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-19 02:46:36,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:36,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-19 02:46:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 02:46:36,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:36,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:36,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 02:46:36,682 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:36,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:36,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-19 02:46:36,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:36,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797619205] [2020-08-19 02:46:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,711 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 02:46:36,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797619205] [2020-08-19 02:46:36,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:36,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:36,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704855543] [2020-08-19 02:46:36,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:36,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:36,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:36,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:36,716 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-19 02:46:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:36,765 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-19 02:46:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:36,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 02:46:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:36,776 INFO L225 Difference]: With dead ends: 1932 [2020-08-19 02:46:36,777 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 02:46:36,778 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 02:46:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 02:46:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-19 02:46:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-19 02:46:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-19 02:46:36,859 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-19 02:46:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:36,859 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-19 02:46:36,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:36,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-19 02:46:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 02:46:36,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:36,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:36,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 02:46:36,864 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-19 02:46:36,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:36,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955660943] [2020-08-19 02:46:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:36,889 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 02:46:36,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955660943] [2020-08-19 02:46:36,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:36,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:36,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640326770] [2020-08-19 02:46:36,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:36,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:36,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:36,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:36,894 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-19 02:46:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:36,960 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-19 02:46:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:36,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 02:46:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:36,973 INFO L225 Difference]: With dead ends: 3596 [2020-08-19 02:46:36,974 INFO L226 Difference]: Without dead ends: 2090 [2020-08-19 02:46:36,979 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 02:46:36,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-19 02:46:37,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-19 02:46:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-19 02:46:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-19 02:46:37,066 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-19 02:46:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:37,066 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-19 02:46:37,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-19 02:46:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 02:46:37,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:37,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:37,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 02:46:37,070 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:37,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:37,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-19 02:46:37,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:37,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219728472] [2020-08-19 02:46:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:37,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:37,100 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 02:46:37,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219728472] [2020-08-19 02:46:37,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:37,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:37,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225517873] [2020-08-19 02:46:37,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:37,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:37,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:37,106 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-19 02:46:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:37,153 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-19 02:46:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:37,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 02:46:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:37,180 INFO L225 Difference]: With dead ends: 3132 [2020-08-19 02:46:37,180 INFO L226 Difference]: Without dead ends: 2122 [2020-08-19 02:46:37,182 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 02:46:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-19 02:46:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-19 02:46:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-19 02:46:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-19 02:46:37,242 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-19 02:46:37,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:37,242 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-19 02:46:37,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:37,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-19 02:46:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 02:46:37,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:37,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:37,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 02:46:37,246 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:37,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:37,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-19 02:46:37,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:37,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066947693] [2020-08-19 02:46:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:37,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:37,288 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 02:46:37,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066947693] [2020-08-19 02:46:37,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:37,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:37,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068705004] [2020-08-19 02:46:37,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:37,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:37,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:37,290 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-19 02:46:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:37,351 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-19 02:46:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:37,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 02:46:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:37,369 INFO L225 Difference]: With dead ends: 3724 [2020-08-19 02:46:37,370 INFO L226 Difference]: Without dead ends: 3722 [2020-08-19 02:46:37,371 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 02:46:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-19 02:46:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-19 02:46:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-19 02:46:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-19 02:46:37,455 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-19 02:46:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:37,455 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-19 02:46:37,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-19 02:46:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 02:46:37,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:37,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:37,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 02:46:37,461 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-19 02:46:37,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:37,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198884364] [2020-08-19 02:46:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:37,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:37,498 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 02:46:37,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198884364] [2020-08-19 02:46:37,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:37,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:37,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516216384] [2020-08-19 02:46:37,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:37,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:37,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:37,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:37,500 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-19 02:46:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:37,568 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-19 02:46:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:37,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 02:46:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:37,587 INFO L225 Difference]: With dead ends: 7116 [2020-08-19 02:46:37,587 INFO L226 Difference]: Without dead ends: 4106 [2020-08-19 02:46:37,593 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 02:46:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-19 02:46:37,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-19 02:46:37,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-19 02:46:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-19 02:46:37,725 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-19 02:46:37,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:37,725 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-19 02:46:37,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:37,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-19 02:46:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 02:46:37,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:37,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:37,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 02:46:37,731 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:37,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-19 02:46:37,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:37,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841693116] [2020-08-19 02:46:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:37,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:37,754 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 02:46:37,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841693116] [2020-08-19 02:46:37,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:37,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:37,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852712234] [2020-08-19 02:46:37,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:37,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:37,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:37,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:37,756 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-19 02:46:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:37,813 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-19 02:46:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:37,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 02:46:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:37,834 INFO L225 Difference]: With dead ends: 6156 [2020-08-19 02:46:37,834 INFO L226 Difference]: Without dead ends: 4170 [2020-08-19 02:46:37,839 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 02:46:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-19 02:46:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-19 02:46:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-19 02:46:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-19 02:46:37,953 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-19 02:46:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:37,953 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-19 02:46:37,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-19 02:46:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 02:46:37,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:37,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:37,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 02:46:37,959 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:37,959 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-19 02:46:37,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:37,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583464076] [2020-08-19 02:46:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:37,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:37,984 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 02:46:37,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583464076] [2020-08-19 02:46:37,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:37,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:37,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957829079] [2020-08-19 02:46:37,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:37,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:37,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:37,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:37,985 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-19 02:46:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:38,090 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-19 02:46:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:38,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 02:46:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:38,120 INFO L225 Difference]: With dead ends: 12108 [2020-08-19 02:46:38,120 INFO L226 Difference]: Without dead ends: 8074 [2020-08-19 02:46:38,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-19 02:46:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-19 02:46:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 02:46:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-19 02:46:38,371 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-19 02:46:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:38,371 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-19 02:46:38,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-19 02:46:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 02:46:38,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:38,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:38,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 02:46:38,382 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-19 02:46:38,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:38,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290298150] [2020-08-19 02:46:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,423 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 02:46:38,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290298150] [2020-08-19 02:46:38,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:38,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:38,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492856592] [2020-08-19 02:46:38,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:38,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:38,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:38,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,425 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-19 02:46:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:38,536 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-19 02:46:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:38,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 02:46:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:38,555 INFO L225 Difference]: With dead ends: 9100 [2020-08-19 02:46:38,555 INFO L226 Difference]: Without dead ends: 9098 [2020-08-19 02:46:38,559 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 02:46:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-19 02:46:38,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-19 02:46:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 02:46:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-19 02:46:38,775 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-19 02:46:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:38,775 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-19 02:46:38,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-19 02:46:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 02:46:38,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:38,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:38,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 02:46:38,786 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:38,786 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-19 02:46:38,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:38,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314780245] [2020-08-19 02:46:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,808 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 02:46:38,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314780245] [2020-08-19 02:46:38,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:38,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:38,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271322561] [2020-08-19 02:46:38,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:38,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:38,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:38,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,809 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-19 02:46:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:38,943 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-19 02:46:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:38,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 02:46:38,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:38,968 INFO L225 Difference]: With dead ends: 13708 [2020-08-19 02:46:38,968 INFO L226 Difference]: Without dead ends: 13706 [2020-08-19 02:46:38,974 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 02:46:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-19 02:46:39,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-19 02:46:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-19 02:46:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-19 02:46:39,260 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-19 02:46:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,261 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-19 02:46:39,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-19 02:46:39,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 02:46:39,278 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 02:46:39,279 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-19 02:46:39,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618400397] [2020-08-19 02:46:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,298 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 02:46:39,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618400397] [2020-08-19 02:46:39,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988193129] [2020-08-19 02:46:39,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,300 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-19 02:46:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,467 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-19 02:46:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 02:46:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,500 INFO L225 Difference]: With dead ends: 27788 [2020-08-19 02:46:39,501 INFO L226 Difference]: Without dead ends: 15754 [2020-08-19 02:46:39,527 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 02:46:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-19 02:46:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-19 02:46:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-19 02:46:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-19 02:46:39,934 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-19 02:46:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,934 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-19 02:46:39,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-19 02:46:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 02:46:39,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 02:46:39,953 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-19 02:46:39,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456844793] [2020-08-19 02:46:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,982 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 02:46:39,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456844793] [2020-08-19 02:46:39,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244798212] [2020-08-19 02:46:39,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,984 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-19 02:46:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:40,141 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-19 02:46:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:40,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 02:46:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:40,171 INFO L225 Difference]: With dead ends: 23820 [2020-08-19 02:46:40,171 INFO L226 Difference]: Without dead ends: 16138 [2020-08-19 02:46:40,188 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 02:46:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-19 02:46:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-19 02:46:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-19 02:46:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-19 02:46:40,946 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-19 02:46:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:40,946 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-19 02:46:40,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-19 02:46:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 02:46:40,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:40,964 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:40,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 02:46:40,965 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:40,966 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-19 02:46:40,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:40,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860458348] [2020-08-19 02:46:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:40,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:40,986 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 02:46:40,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860458348] [2020-08-19 02:46:40,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:40,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:40,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458159667] [2020-08-19 02:46:40,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:40,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:40,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:40,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:40,988 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-19 02:46:41,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:41,252 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-19 02:46:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:41,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 02:46:41,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:41,383 INFO L225 Difference]: With dead ends: 26636 [2020-08-19 02:46:41,384 INFO L226 Difference]: Without dead ends: 26634 [2020-08-19 02:46:41,387 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 02:46:41,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-19 02:46:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-19 02:46:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-19 02:46:41,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-19 02:46:41,838 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-19 02:46:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:41,838 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-19 02:46:41,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:41,839 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-19 02:46:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 02:46:41,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:41,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:41,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 02:46:41,879 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-19 02:46:41,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:41,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070314153] [2020-08-19 02:46:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:41,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:41,898 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 02:46:41,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070314153] [2020-08-19 02:46:41,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:41,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:41,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770159528] [2020-08-19 02:46:41,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:41,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:41,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:41,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:41,900 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-19 02:46:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:42,401 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-19 02:46:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:42,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 02:46:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:42,455 INFO L225 Difference]: With dead ends: 55308 [2020-08-19 02:46:42,455 INFO L226 Difference]: Without dead ends: 31242 [2020-08-19 02:46:42,494 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 02:46:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-19 02:46:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-19 02:46:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-19 02:46:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-19 02:46:42,995 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-19 02:46:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:42,995 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-19 02:46:42,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-19 02:46:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 02:46:43,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:43,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:43,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 02:46:43,218 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-19 02:46:43,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:43,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184486957] [2020-08-19 02:46:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:43,236 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 02:46:43,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184486957] [2020-08-19 02:46:43,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:43,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:43,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454234994] [2020-08-19 02:46:43,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:43,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:43,238 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-19 02:46:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:43,612 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-19 02:46:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:43,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 02:46:43,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:43,647 INFO L225 Difference]: With dead ends: 46860 [2020-08-19 02:46:43,648 INFO L226 Difference]: Without dead ends: 31754 [2020-08-19 02:46:43,672 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 02:46:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-19 02:46:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-19 02:46:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-19 02:46:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-19 02:46:44,182 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-19 02:46:44,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:44,183 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-19 02:46:44,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:44,183 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-19 02:46:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 02:46:44,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:44,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:44,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 02:46:44,951 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:44,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-19 02:46:44,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:44,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094038278] [2020-08-19 02:46:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:44,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:44,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094038278] [2020-08-19 02:46:44,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:44,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:44,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968754570] [2020-08-19 02:46:44,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:44,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:44,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:44,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:44,971 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-19 02:46:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:45,390 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-19 02:46:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:45,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 02:46:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:45,446 INFO L225 Difference]: With dead ends: 51210 [2020-08-19 02:46:45,446 INFO L226 Difference]: Without dead ends: 51208 [2020-08-19 02:46:45,459 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 02:46:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-19 02:46:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-19 02:46:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-19 02:46:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-19 02:46:46,096 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-19 02:46:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:46,097 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-19 02:46:46,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-19 02:46:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 02:46:46,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:46,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:46,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 02:46:46,128 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:46,128 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-19 02:46:46,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:46,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394838777] [2020-08-19 02:46:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:46,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:46,146 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 02:46:46,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394838777] [2020-08-19 02:46:46,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:46,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:46,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174998257] [2020-08-19 02:46:46,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:46,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:46,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:46,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:46,148 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-19 02:46:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:46,806 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-19 02:46:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:46,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 02:46:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:46,807 INFO L225 Difference]: With dead ends: 109576 [2020-08-19 02:46:46,807 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:46:46,922 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 02:46:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:46:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:46:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:46:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:46:46,923 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-19 02:46:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:46,923 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:46:46,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:46:46,923 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:46:46,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 02:46:46,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:46:46,956 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 02:46:46,956 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:46:46,957 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:46:46,957 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 02:46:46,957 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 02:46:46,957 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:46:46,957 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-19 02:46:46,957 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-19 02:46:46,957 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-19 02:46:46,958 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-19 02:46:46,958 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-19 02:46:46,958 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-19 02:46:46,958 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,958 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,958 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,958 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,959 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-19 02:46:46,959 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,959 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-19 02:46:46,959 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,959 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,959 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-19 02:46:46,959 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,960 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-19 02:46:46,963 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,963 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,963 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-19 02:46:46,964 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-19 02:46:46,964 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-19 02:46:46,964 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-19 02:46:46,964 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,964 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,964 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-19 02:46:46,964 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-19 02:46:46,965 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-19 02:46:46,965 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,965 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,965 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,965 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,965 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,965 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,965 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,965 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-19 02:46:46,966 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-19 02:46:46,966 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,966 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 02:46:46,966 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-19 02:46:46,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:46:46 BoogieIcfgContainer [2020-08-19 02:46:46,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:46:46,988 INFO L168 Benchmark]: Toolchain (without parser) took 13189.39 ms. Allocated memory was 142.1 MB in the beginning and 1.0 GB in the end (delta: 858.8 MB). Free memory was 105.7 MB in the beginning and 216.1 MB in the end (delta: -110.4 MB). Peak memory consumption was 748.4 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:46,989 INFO L168 Benchmark]: CDTParser took 0.22 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 02:46:46,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.34 ms. Allocated memory is still 142.1 MB. Free memory was 105.5 MB in the beginning and 94.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:46,996 INFO L168 Benchmark]: Boogie Preprocessor took 140.58 ms. Allocated memory was 142.1 MB in the beginning and 206.0 MB in the end (delta: 64.0 MB). Free memory was 94.5 MB in the beginning and 183.7 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:46,997 INFO L168 Benchmark]: RCFGBuilder took 372.56 ms. Allocated memory is still 206.0 MB. Free memory was 183.7 MB in the beginning and 163.2 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:46,997 INFO L168 Benchmark]: TraceAbstraction took 12410.52 ms. Allocated memory was 206.0 MB in the beginning and 1.0 GB in the end (delta: 794.8 MB). Free memory was 162.5 MB in the beginning and 216.1 MB in the end (delta: -53.6 MB). Peak memory consumption was 741.2 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:46,998 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 256.34 ms. Allocated memory is still 142.1 MB. Free memory was 105.5 MB in the beginning and 94.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.58 ms. Allocated memory was 142.1 MB in the beginning and 206.0 MB in the end (delta: 64.0 MB). Free memory was 94.5 MB in the beginning and 183.7 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.56 ms. Allocated memory is still 206.0 MB. Free memory was 183.7 MB in the beginning and 163.2 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12410.52 ms. Allocated memory was 206.0 MB in the beginning and 1.0 GB in the end (delta: 794.8 MB). Free memory was 162.5 MB in the beginning and 216.1 MB in the end (delta: -53.6 MB). Peak memory consumption was 741.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.2s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.8s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...