/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=NARROWEST -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 21:55:23,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:55:23,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:55:23,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:55:23,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:55:23,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:55:23,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:55:23,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:55:23,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:55:23,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:55:23,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:55:23,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:55:23,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:55:23,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:55:23,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:55:23,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:55:23,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:55:23,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:55:23,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:55:23,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:55:23,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:55:23,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:55:23,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:55:23,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:55:23,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:55:23,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:55:23,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:55:23,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:55:23,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:55:23,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 21:55:23,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 21:55:23,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 21:55:23,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 21:55:23,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 21:55:23,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 21:55:23,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 21:55:23,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 21:55:23,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 21:55:23,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:55:23,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:55:23,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:55:23,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:55:23,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:55:23,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:55:23,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:55:23,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:55:23,706 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:55:23,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:55:23,707 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:55:23,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:55:23,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:55:23,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:55:23,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:55:23,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:55:23,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:55:23,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:55:23,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:55:23,709 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:55:23,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:55:23,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:55:23,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:55:23,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:55:23,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:55:23,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:55:23,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:55:23,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:55:23,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:55:23,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:55:23,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:55:23,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:55:23,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:55:23,711 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=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 21:55:24,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:55:24,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:55:24,072 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:55:24,074 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:55:24,074 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:55:24,075 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-18 21:55:24,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2596e52c4/92831707e6674556b416c810526f24f4/FLAGc0d15175b [2020-08-18 21:55:24,611 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:55:24,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-18 21:55:24,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2596e52c4/92831707e6674556b416c810526f24f4/FLAGc0d15175b [2020-08-18 21:55:25,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2596e52c4/92831707e6674556b416c810526f24f4 [2020-08-18 21:55:25,017 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:55:25,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:55:25,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:25,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:55:25,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:55:25,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:25" (1/1) ... [2020-08-18 21:55:25,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f5cdb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25, skipping insertion in model container [2020-08-18 21:55:25,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:55:25" (1/1) ... [2020-08-18 21:55:25,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:55:25,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:55:25,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:25,316 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:55:25,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:55:25,368 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:55:25,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25 WrapperNode [2020-08-18 21:55:25,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:55:25,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:55:25,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:55:25,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:55:25,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25" (1/1) ... [2020-08-18 21:55:25,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25" (1/1) ... [2020-08-18 21:55:25,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25" (1/1) ... [2020-08-18 21:55:25,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25" (1/1) ... [2020-08-18 21:55:25,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25" (1/1) ... [2020-08-18 21:55:25,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25" (1/1) ... [2020-08-18 21:55:25,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25" (1/1) ... [2020-08-18 21:55:25,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:55:25,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:55:25,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:55:25,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:55:25,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:55:25,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:55:25,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:55:25,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:55:25,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:55:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:55:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:55:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:55:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:55:25,838 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:55:25,838 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:55:25,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:25 BoogieIcfgContainer [2020-08-18 21:55:25,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:55:25,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:55:25,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:55:25,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:55:25,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:55:25" (1/3) ... [2020-08-18 21:55:25,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14258d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:25, skipping insertion in model container [2020-08-18 21:55:25,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:55:25" (2/3) ... [2020-08-18 21:55:25,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14258d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:55:25, skipping insertion in model container [2020-08-18 21:55:25,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:55:25" (3/3) ... [2020-08-18 21:55:25,851 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-18 21:55:25,863 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:55:25,872 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:55:25,887 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:55:25,917 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:55:25,918 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:55:25,918 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:55:25,918 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:55:25,918 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:55:25,918 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:55:25,919 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:55:25,919 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:55:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-18 21:55:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 21:55:25,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:25,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:25,958 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:25,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:25,967 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-18 21:55:25,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:25,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565748422] [2020-08-18 21:55:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:26,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565748422] [2020-08-18 21:55:26,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:26,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:26,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937874506] [2020-08-18 21:55:26,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:26,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:26,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:26,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,204 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-18 21:55:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:26,255 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-18 21:55:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:26,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 21:55:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:26,269 INFO L225 Difference]: With dead ends: 57 [2020-08-18 21:55:26,269 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 21:55:26,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 21:55:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-18 21:55:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 21:55:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-18 21:55:26,312 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-18 21:55:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:26,313 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-18 21:55:26,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-18 21:55:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 21:55:26,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:26,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:26,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:55:26,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-18 21:55:26,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:26,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184448282] [2020-08-18 21:55:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:26,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184448282] [2020-08-18 21:55:26,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:26,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:26,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486649915] [2020-08-18 21:55:26,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:26,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:26,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:26,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,374 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-18 21:55:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:26,403 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-18 21:55:26,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:26,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 21:55:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:26,405 INFO L225 Difference]: With dead ends: 67 [2020-08-18 21:55:26,405 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 21:55:26,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 21:55:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-18 21:55:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 21:55:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-18 21:55:26,415 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-18 21:55:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:26,416 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-18 21:55:26,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-18 21:55:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 21:55:26,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:26,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:26,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:55:26,418 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:26,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:26,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-18 21:55:26,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:26,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953152916] [2020-08-18 21:55:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:26,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953152916] [2020-08-18 21:55:26,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:26,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:26,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812896468] [2020-08-18 21:55:26,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:26,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:26,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:26,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,461 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-18 21:55:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:26,480 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-18 21:55:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:26,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 21:55:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:26,483 INFO L225 Difference]: With dead ends: 63 [2020-08-18 21:55:26,483 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 21:55:26,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 21:55:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-18 21:55:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 21:55:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-18 21:55:26,495 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-18 21:55:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:26,495 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-18 21:55:26,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-18 21:55:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 21:55:26,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:26,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:26,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:55:26,497 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-18 21:55:26,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:26,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118683677] [2020-08-18 21:55:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:26,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118683677] [2020-08-18 21:55:26,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:26,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:26,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005191024] [2020-08-18 21:55:26,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:26,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:26,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,538 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-18 21:55:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:26,565 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-18 21:55:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:26,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 21:55:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:26,568 INFO L225 Difference]: With dead ends: 76 [2020-08-18 21:55:26,568 INFO L226 Difference]: Without dead ends: 74 [2020-08-18 21:55:26,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-18 21:55:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-18 21:55:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 21:55:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-18 21:55:26,580 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-18 21:55:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:26,581 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-18 21:55:26,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-18 21:55:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 21:55:26,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:26,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:55:26,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:55:26,585 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:26,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-18 21:55:26,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:26,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676528490] [2020-08-18 21:55:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:26,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676528490] [2020-08-18 21:55:26,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:26,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:26,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281784230] [2020-08-18 21:55:26,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:26,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:26,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:26,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,655 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-18 21:55:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:26,697 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-18 21:55:26,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:26,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 21:55:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:26,706 INFO L225 Difference]: With dead ends: 124 [2020-08-18 21:55:26,706 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 21:55:26,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 21:55:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-18 21:55:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 21:55:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-18 21:55:26,723 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-18 21:55:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:26,724 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-18 21:55:26,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-18 21:55:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:55:26,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:26,725 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 21:55:26,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:55:26,726 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:26,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:26,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-18 21:55:26,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:26,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597250657] [2020-08-18 21:55:26,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:26,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597250657] [2020-08-18 21:55:26,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:26,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:26,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93623802] [2020-08-18 21:55:26,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:26,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:26,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,759 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-18 21:55:26,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:26,776 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-18 21:55:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:26,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 21:55:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:26,778 INFO L225 Difference]: With dead ends: 111 [2020-08-18 21:55:26,778 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 21:55:26,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 21:55:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 21:55:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 21:55:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-18 21:55:26,790 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-18 21:55:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:26,790 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-18 21:55:26,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-18 21:55:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:55:26,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:26,792 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 21:55:26,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:55:26,793 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-18 21:55:26,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:26,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258853859] [2020-08-18 21:55:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:26,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258853859] [2020-08-18 21:55:26,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:26,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:26,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370954820] [2020-08-18 21:55:26,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:26,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:26,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:26,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,827 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-18 21:55:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:26,846 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-18 21:55:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:26,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 21:55:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:26,848 INFO L225 Difference]: With dead ends: 132 [2020-08-18 21:55:26,849 INFO L226 Difference]: Without dead ends: 130 [2020-08-18 21:55:26,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-18 21:55:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-18 21:55:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 21:55:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-18 21:55:26,863 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-18 21:55:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:26,864 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-18 21:55:26,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-18 21:55:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:55:26,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:26,866 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 21:55:26,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:55:26,866 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-18 21:55:26,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:26,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837017145] [2020-08-18 21:55:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:26,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837017145] [2020-08-18 21:55:26,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:26,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:26,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737824461] [2020-08-18 21:55:26,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:26,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:26,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:26,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,927 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-18 21:55:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:26,964 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-18 21:55:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:26,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 21:55:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:26,969 INFO L225 Difference]: With dead ends: 232 [2020-08-18 21:55:26,969 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 21:55:26,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 21:55:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 21:55:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 21:55:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-18 21:55:26,986 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-18 21:55:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:26,987 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-18 21:55:26,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-18 21:55:26,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:55:26,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:26,989 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 21:55:26,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:55:26,989 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:26,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:26,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-18 21:55:26,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:26,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935955147] [2020-08-18 21:55:26,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:27,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935955147] [2020-08-18 21:55:27,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:27,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:27,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097125080] [2020-08-18 21:55:27,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:27,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:27,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:27,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,041 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-18 21:55:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:27,063 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-18 21:55:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:27,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 21:55:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:27,065 INFO L225 Difference]: With dead ends: 204 [2020-08-18 21:55:27,065 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 21:55:27,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 21:55:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-18 21:55:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 21:55:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-18 21:55:27,079 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-18 21:55:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:27,079 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-18 21:55:27,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-18 21:55:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:55:27,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:27,081 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 21:55:27,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:55:27,082 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:27,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-18 21:55:27,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:27,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26836150] [2020-08-18 21:55:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:27,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26836150] [2020-08-18 21:55:27,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:27,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:27,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35861981] [2020-08-18 21:55:27,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:27,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:27,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:27,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,108 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-18 21:55:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:27,129 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-18 21:55:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:27,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 21:55:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:27,131 INFO L225 Difference]: With dead ends: 236 [2020-08-18 21:55:27,131 INFO L226 Difference]: Without dead ends: 234 [2020-08-18 21:55:27,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-18 21:55:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-18 21:55:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 21:55:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-18 21:55:27,147 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-18 21:55:27,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:27,147 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-18 21:55:27,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-18 21:55:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:55:27,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:27,149 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 21:55:27,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:55:27,150 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:27,150 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-18 21:55:27,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:27,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577548893] [2020-08-18 21:55:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:27,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577548893] [2020-08-18 21:55:27,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:27,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:27,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081978921] [2020-08-18 21:55:27,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:27,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:27,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:27,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,197 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-18 21:55:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:27,221 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-18 21:55:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:27,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 21:55:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:27,223 INFO L225 Difference]: With dead ends: 444 [2020-08-18 21:55:27,223 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 21:55:27,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 21:55:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 21:55:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 21:55:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-18 21:55:27,242 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-18 21:55:27,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:27,242 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-18 21:55:27,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:27,242 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-18 21:55:27,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:55:27,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:27,244 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 21:55:27,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:55:27,245 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:27,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:27,245 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-18 21:55:27,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:27,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011543527] [2020-08-18 21:55:27,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:27,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011543527] [2020-08-18 21:55:27,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:27,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:27,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308003231] [2020-08-18 21:55:27,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:27,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:27,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:27,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,268 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-18 21:55:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:27,288 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-18 21:55:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:27,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:55:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:27,291 INFO L225 Difference]: With dead ends: 384 [2020-08-18 21:55:27,291 INFO L226 Difference]: Without dead ends: 266 [2020-08-18 21:55:27,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-18 21:55:27,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-18 21:55:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-18 21:55:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-18 21:55:27,307 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-18 21:55:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:27,307 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-18 21:55:27,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-18 21:55:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:55:27,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:27,309 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 21:55:27,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:55:27,310 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:27,310 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-18 21:55:27,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:27,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945322978] [2020-08-18 21:55:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:27,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945322978] [2020-08-18 21:55:27,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:27,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:27,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125644343] [2020-08-18 21:55:27,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:27,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,336 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-18 21:55:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:27,356 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-18 21:55:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:27,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:55:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:27,359 INFO L225 Difference]: With dead ends: 426 [2020-08-18 21:55:27,360 INFO L226 Difference]: Without dead ends: 424 [2020-08-18 21:55:27,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-18 21:55:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-18 21:55:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 21:55:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-18 21:55:27,375 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-18 21:55:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:27,375 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-18 21:55:27,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-18 21:55:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:55:27,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:55:27,378 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 21:55:27,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:55:27,378 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:55:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:55:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-18 21:55:27,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:55:27,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325315409] [2020-08-18 21:55:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:55:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:55:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:55:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:55:27,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325315409] [2020-08-18 21:55:27,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:55:27,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:55:27,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255729552] [2020-08-18 21:55:27,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:55:27,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:55:27,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:55:27,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,412 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-18 21:55:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:55:27,439 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-18 21:55:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:55:27,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:55:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:55:27,440 INFO L225 Difference]: With dead ends: 856 [2020-08-18 21:55:27,440 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:55:27,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:55:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:55:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:55:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:55:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:55:27,444 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-18 21:55:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:55:27,444 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:55:27,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:55:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:55:27,445 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:55:27,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:55:27,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:55:27,471 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:55:27,471 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:55:27,471 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:55:27,471 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:55:27,471 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:55:27,471 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:55:27,472 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-18 21:55:27,472 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-18 21:55:27,472 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-18 21:55:27,472 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:55:27,472 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-18 21:55:27,472 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:55:27,472 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:55:27,473 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:55:27,473 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:55:27,473 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:55:27,473 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-18 21:55:27,473 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 21:55:27,473 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:55:27,473 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-18 21:55:27,474 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-18 21:55:27,474 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-18 21:55:27,474 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-18 21:55:27,474 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:55:27,474 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-18 21:55:27,474 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-18 21:55:27,474 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-18 21:55:27,475 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-18 21:55:27,475 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:55:27,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:55:27 BoogieIcfgContainer [2020-08-18 21:55:27,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:55:27,490 INFO L168 Benchmark]: Toolchain (without parser) took 2470.19 ms. Allocated memory was 140.0 MB in the beginning and 235.9 MB in the end (delta: 95.9 MB). Free memory was 102.5 MB in the beginning and 144.9 MB in the end (delta: -42.4 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,491 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,492 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.93 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,493 INFO L168 Benchmark]: Boogie Preprocessor took 166.83 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 182.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,494 INFO L168 Benchmark]: RCFGBuilder took 304.91 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 166.9 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,495 INFO L168 Benchmark]: TraceAbstraction took 1643.13 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 166.9 MB in the beginning and 144.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 53.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:55:27,498 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 346.93 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 166.83 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 182.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.91 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 166.9 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1643.13 ms. Allocated memory was 203.9 MB in the beginning and 235.9 MB in the end (delta: 32.0 MB). Free memory was 166.9 MB in the beginning and 144.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 53.9 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: 1.5s, 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, 0.1s 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...