/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:41:58,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:41:58,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:41:59,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:41:59,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:41:59,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:41:59,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:41:59,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:41:59,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:41:59,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:41:59,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:41:59,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:41:59,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:41:59,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:41:59,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:41:59,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:41:59,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:41:59,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:41:59,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:41:59,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:41:59,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:41:59,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:41:59,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:41:59,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:41:59,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:41:59,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:41:59,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:41:59,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:41:59,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:41:59,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:41:59,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:41:59,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:41:59,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:41:59,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:41:59,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:41:59,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:41:59,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 18:41:59,134 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:41:59,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:41:59,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:41:59,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:41:59,137 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:41:59,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:41:59,138 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:41:59,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:41:59,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:41:59,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:41:59,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:41:59,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:41:59,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:41:59,140 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:41:59,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:41:59,141 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:41:59,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:41:59,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:41:59,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:41:59,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:41:59,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:41:59,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:41:59,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:41:59,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:41:59,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:41:59,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:41:59,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:41:59,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:41:59,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:41:59,144 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:41:59,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:41:59,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:41:59,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:41:59,458 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:41:59,458 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:41:59,459 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-18 18:41:59,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0de5d55b/0eb73cac38f44795af4f26ed32c4b213/FLAG96e9c6d77 [2020-08-18 18:41:59,991 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:41:59,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-18 18:42:00,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0de5d55b/0eb73cac38f44795af4f26ed32c4b213/FLAG96e9c6d77 [2020-08-18 18:42:00,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e0de5d55b/0eb73cac38f44795af4f26ed32c4b213 [2020-08-18 18:42:00,386 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:42:00,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:42:00,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:42:00,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:42:00,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:42:00,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:42:00" (1/1) ... [2020-08-18 18:42:00,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406521a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00, skipping insertion in model container [2020-08-18 18:42:00,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:42:00" (1/1) ... [2020-08-18 18:42:00,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:42:00,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:42:00,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:42:00,655 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:42:00,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:42:00,690 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:42:00,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00 WrapperNode [2020-08-18 18:42:00,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:42:00,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:42:00,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:42:00,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:42:00,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00" (1/1) ... [2020-08-18 18:42:00,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00" (1/1) ... [2020-08-18 18:42:00,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00" (1/1) ... [2020-08-18 18:42:00,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00" (1/1) ... [2020-08-18 18:42:00,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00" (1/1) ... [2020-08-18 18:42:00,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00" (1/1) ... [2020-08-18 18:42:00,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00" (1/1) ... [2020-08-18 18:42:00,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:42:00,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:42:00,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:42:00,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:42:00,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:42:00,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:42:00,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:42:00,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:42:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:42:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:42:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:42:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:42:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:42:01,081 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:42:01,081 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:42:01,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:42:01 BoogieIcfgContainer [2020-08-18 18:42:01,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:42:01,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:42:01,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:42:01,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:42:01,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:42:00" (1/3) ... [2020-08-18 18:42:01,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa374fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:42:01, skipping insertion in model container [2020-08-18 18:42:01,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:00" (2/3) ... [2020-08-18 18:42:01,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa374fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:42:01, skipping insertion in model container [2020-08-18 18:42:01,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:42:01" (3/3) ... [2020-08-18 18:42:01,094 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-18 18:42:01,106 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:42:01,114 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:42:01,137 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:42:01,200 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:42:01,200 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:42:01,200 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:42:01,203 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:42:01,203 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:42:01,203 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:42:01,203 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:42:01,203 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:42:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-18 18:42:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 18:42:01,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:01,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:01,241 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:01,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:01,246 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-18 18:42:01,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:01,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300110785] [2020-08-18 18:42:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:01,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300110785] [2020-08-18 18:42:01,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:01,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:01,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730529494] [2020-08-18 18:42:01,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:01,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:01,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:01,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,431 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-18 18:42:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:01,495 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-18 18:42:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:01,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 18:42:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:01,509 INFO L225 Difference]: With dead ends: 57 [2020-08-18 18:42:01,509 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 18:42:01,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 18:42:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-18 18:42:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 18:42:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-18 18:42:01,557 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-18 18:42:01,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:01,558 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-18 18:42:01,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-18 18:42:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 18:42:01,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:01,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:01,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:42:01,560 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-18 18:42:01,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:01,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706842235] [2020-08-18 18:42:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:01,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706842235] [2020-08-18 18:42:01,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:01,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:01,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885266105] [2020-08-18 18:42:01,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:01,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:01,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:01,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,615 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-18 18:42:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:01,648 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-18 18:42:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:01,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 18:42:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:01,651 INFO L225 Difference]: With dead ends: 67 [2020-08-18 18:42:01,651 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 18:42:01,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 18:42:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-18 18:42:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 18:42:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-18 18:42:01,661 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-18 18:42:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:01,662 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-18 18:42:01,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-18 18:42:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 18:42:01,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:01,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:01,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:42:01,664 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:01,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-18 18:42:01,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:01,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24964982] [2020-08-18 18:42:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:01,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24964982] [2020-08-18 18:42:01,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:01,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:01,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341698278] [2020-08-18 18:42:01,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:01,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:01,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:01,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,709 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-18 18:42:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:01,739 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-18 18:42:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:01,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 18:42:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:01,741 INFO L225 Difference]: With dead ends: 63 [2020-08-18 18:42:01,741 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 18:42:01,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 18:42:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-18 18:42:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 18:42:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-18 18:42:01,750 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-18 18:42:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:01,750 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-18 18:42:01,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-18 18:42:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 18:42:01,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:01,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:01,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:42:01,754 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:01,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:01,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-18 18:42:01,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:01,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437043427] [2020-08-18 18:42:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:01,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437043427] [2020-08-18 18:42:01,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:01,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:01,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605500493] [2020-08-18 18:42:01,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:01,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:01,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:01,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,829 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-18 18:42:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:01,851 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-18 18:42:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:01,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 18:42:01,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:01,853 INFO L225 Difference]: With dead ends: 76 [2020-08-18 18:42:01,853 INFO L226 Difference]: Without dead ends: 74 [2020-08-18 18:42:01,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-18 18:42:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-18 18:42:01,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 18:42:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-18 18:42:01,864 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-18 18:42:01,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:01,864 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-18 18:42:01,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-18 18:42:01,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 18:42:01,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:01,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:01,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:42:01,866 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:01,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:01,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-18 18:42:01,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:01,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627430314] [2020-08-18 18:42:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:01,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627430314] [2020-08-18 18:42:01,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:01,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:01,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281229963] [2020-08-18 18:42:01,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:01,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:01,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:01,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,905 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-18 18:42:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:01,924 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-18 18:42:01,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:01,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 18:42:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:01,926 INFO L225 Difference]: With dead ends: 124 [2020-08-18 18:42:01,926 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 18:42:01,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 18:42:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-18 18:42:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 18:42:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-18 18:42:01,938 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-18 18:42:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:01,938 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-18 18:42:01,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-18 18:42:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 18:42:01,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:01,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:01,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:42:01,940 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-18 18:42:01,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:01,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215597041] [2020-08-18 18:42:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:01,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215597041] [2020-08-18 18:42:01,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:01,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:01,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764915437] [2020-08-18 18:42:01,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:01,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:01,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:01,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:01,978 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-18 18:42:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:02,006 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-18 18:42:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:02,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 18:42:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:02,009 INFO L225 Difference]: With dead ends: 111 [2020-08-18 18:42:02,009 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 18:42:02,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 18:42:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 18:42:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 18:42:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-18 18:42:02,020 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-18 18:42:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:02,020 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-18 18:42:02,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:02,021 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-18 18:42:02,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 18:42:02,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:02,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:02,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:42:02,023 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:02,023 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-18 18:42:02,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:02,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064992056] [2020-08-18 18:42:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:02,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064992056] [2020-08-18 18:42:02,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:02,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:02,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198987006] [2020-08-18 18:42:02,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:02,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:02,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,058 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-18 18:42:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:02,085 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-18 18:42:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:02,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 18:42:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:02,088 INFO L225 Difference]: With dead ends: 132 [2020-08-18 18:42:02,088 INFO L226 Difference]: Without dead ends: 130 [2020-08-18 18:42:02,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-18 18:42:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-18 18:42:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 18:42:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-18 18:42:02,111 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-18 18:42:02,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:02,112 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-18 18:42:02,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-18 18:42:02,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 18:42:02,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:02,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:02,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:42:02,115 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:02,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:02,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-18 18:42:02,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:02,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154825755] [2020-08-18 18:42:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:02,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154825755] [2020-08-18 18:42:02,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:02,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:02,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549425960] [2020-08-18 18:42:02,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:02,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:02,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:02,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,144 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-18 18:42:02,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:02,163 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-18 18:42:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:02,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 18:42:02,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:02,165 INFO L225 Difference]: With dead ends: 232 [2020-08-18 18:42:02,166 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 18:42:02,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 18:42:02,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 18:42:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 18:42:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-18 18:42:02,180 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-18 18:42:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:02,181 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-18 18:42:02,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-18 18:42:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:02,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:02,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:02,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:42:02,183 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-18 18:42:02,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:02,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457053987] [2020-08-18 18:42:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:02,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457053987] [2020-08-18 18:42:02,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:02,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:02,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185146632] [2020-08-18 18:42:02,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:02,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:02,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:02,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,224 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-18 18:42:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:02,240 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-18 18:42:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:02,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:02,242 INFO L225 Difference]: With dead ends: 204 [2020-08-18 18:42:02,242 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 18:42:02,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 18:42:02,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-18 18:42:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 18:42:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-18 18:42:02,254 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-18 18:42:02,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:02,255 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-18 18:42:02,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:02,255 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-18 18:42:02,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:02,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:02,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:02,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:42:02,257 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:02,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-18 18:42:02,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:02,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403051190] [2020-08-18 18:42:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:02,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403051190] [2020-08-18 18:42:02,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:02,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:02,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760275021] [2020-08-18 18:42:02,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:02,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,306 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-18 18:42:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:02,324 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-18 18:42:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:02,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:02,327 INFO L225 Difference]: With dead ends: 236 [2020-08-18 18:42:02,327 INFO L226 Difference]: Without dead ends: 234 [2020-08-18 18:42:02,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-18 18:42:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-18 18:42:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 18:42:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-18 18:42:02,352 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-18 18:42:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:02,352 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-18 18:42:02,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-18 18:42:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:02,354 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:02,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:02,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:42:02,355 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:02,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:02,355 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-18 18:42:02,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:02,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754708003] [2020-08-18 18:42:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:02,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754708003] [2020-08-18 18:42:02,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:02,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:02,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80715238] [2020-08-18 18:42:02,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:02,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,389 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-18 18:42:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:02,410 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-18 18:42:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:02,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:02,413 INFO L225 Difference]: With dead ends: 444 [2020-08-18 18:42:02,413 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 18:42:02,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 18:42:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 18:42:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 18:42:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-18 18:42:02,428 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-18 18:42:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:02,429 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-18 18:42:02,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-18 18:42:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:02,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:02,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:02,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:42:02,431 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:02,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:02,431 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-18 18:42:02,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:02,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484246613] [2020-08-18 18:42:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:02,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484246613] [2020-08-18 18:42:02,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:02,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:02,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610999754] [2020-08-18 18:42:02,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:02,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:02,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:02,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,458 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-18 18:42:02,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:02,476 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-18 18:42:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:02,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:02,479 INFO L225 Difference]: With dead ends: 384 [2020-08-18 18:42:02,479 INFO L226 Difference]: Without dead ends: 266 [2020-08-18 18:42:02,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-18 18:42:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-18 18:42:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-18 18:42:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-18 18:42:02,492 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-18 18:42:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:02,492 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-18 18:42:02,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-18 18:42:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:02,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:02,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:02,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:42:02,495 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:02,495 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-18 18:42:02,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:02,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653831591] [2020-08-18 18:42:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:02,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653831591] [2020-08-18 18:42:02,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:02,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:02,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257117385] [2020-08-18 18:42:02,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:02,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,519 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-18 18:42:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:02,539 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-18 18:42:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:02,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:02,542 INFO L225 Difference]: With dead ends: 426 [2020-08-18 18:42:02,542 INFO L226 Difference]: Without dead ends: 424 [2020-08-18 18:42:02,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-18 18:42:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-18 18:42:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 18:42:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-18 18:42:02,560 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-18 18:42:02,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:02,560 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-18 18:42:02,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:02,560 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-18 18:42:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:02,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:02,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:02,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:42:02,562 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:02,563 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-18 18:42:02,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:02,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108406039] [2020-08-18 18:42:02,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:02,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108406039] [2020-08-18 18:42:02,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:02,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:02,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106601692] [2020-08-18 18:42:02,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:02,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:02,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:02,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,621 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-18 18:42:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:02,652 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-18 18:42:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:02,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:02,653 INFO L225 Difference]: With dead ends: 856 [2020-08-18 18:42:02,654 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:42:02,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:42:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:42:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:42:02,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:42:02,659 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-18 18:42:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:02,659 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:42:02,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:42:02,659 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:42:02,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 18:42:02,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:42:02,693 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 18:42:02,693 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:42:02,693 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:42:02,693 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:42:02,693 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:42:02,694 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:42:02,694 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-18 18:42:02,694 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-18 18:42:02,694 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-18 18:42:02,694 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 18:42:02,694 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-18 18:42:02,695 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 18:42:02,695 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 18:42:02,695 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 18:42:02,695 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 18:42:02,695 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 18:42:02,695 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-18 18:42:02,695 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 18:42:02,696 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-18 18:42:02,696 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-18 18:42:02,696 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-18 18:42:02,696 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-18 18:42:02,696 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-18 18:42:02,696 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 18:42:02,696 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-18 18:42:02,697 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-18 18:42:02,697 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-18 18:42:02,697 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-18 18:42:02,697 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 18:42:02,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:42:02 BoogieIcfgContainer [2020-08-18 18:42:02,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:42:02,711 INFO L168 Benchmark]: Toolchain (without parser) took 2323.51 ms. Allocated memory was 140.5 MB in the beginning and 234.4 MB in the end (delta: 93.8 MB). Free memory was 103.5 MB in the beginning and 142.9 MB in the end (delta: -39.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:02,712 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 18:42:02,713 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.37 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 93.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:02,714 INFO L168 Benchmark]: Boogie Preprocessor took 107.36 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 93.2 MB in the beginning and 180.4 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:02,715 INFO L168 Benchmark]: RCFGBuilder took 286.46 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 165.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:02,715 INFO L168 Benchmark]: TraceAbstraction took 1621.62 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 165.3 MB in the beginning and 142.9 MB in the end (delta: 22.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:02,719 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.37 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 93.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.36 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 93.2 MB in the beginning and 180.4 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 286.46 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 165.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1621.62 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 165.3 MB in the beginning and 142.9 MB in the end (delta: 22.4 MB). Peak memory consumption was 54.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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: 24]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...