/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=SMALLEST -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 17:05:20,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:05:20,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:05:20,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:05:20,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:05:20,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:05:20,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:05:20,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:05:20,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:05:20,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:05:20,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:05:20,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:05:20,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:05:20,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:05:20,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:05:20,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:05:20,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:05:20,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:05:20,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:05:20,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:05:20,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:05:20,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:05:20,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:05:20,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:05:20,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:05:20,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:05:20,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:05:20,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:05:20,762 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 17:05:20,806 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:05:20,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:05:20,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:05:20,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:05:20,810 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:05:20,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:05:20,811 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:05:20,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:05:20,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:05:20,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:05:20,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:05:20,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:05:20,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:05:20,812 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:05:20,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:05:20,813 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:05:20,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:05:20,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:05:20,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:05:20,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:05:20,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:05:20,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:05:20,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:05:20,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:05:20,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:05:20,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:05:20,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:05:20,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:05:20,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:05:20,816 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=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:05:21,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:05:21,128 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:05:21,132 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:05:21,133 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:05:21,134 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:05:21,136 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-18 17:05:21,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29a874fc8/a2ecedad1638424fa363635631e0623c/FLAG12ea553a1 [2020-08-18 17:05:21,621 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:05:21,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-18 17:05:21,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29a874fc8/a2ecedad1638424fa363635631e0623c/FLAG12ea553a1 [2020-08-18 17:05:22,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29a874fc8/a2ecedad1638424fa363635631e0623c [2020-08-18 17:05:22,016 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:05:22,018 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:05:22,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:05:22,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:05:22,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:05:22,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:05:22" (1/1) ... [2020-08-18 17:05:22,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4365ba2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22, skipping insertion in model container [2020-08-18 17:05:22,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:05:22" (1/1) ... [2020-08-18 17:05:22,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:05:22,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:05:22,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:05:22,284 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:05:22,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:05:22,321 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:05:22,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22 WrapperNode [2020-08-18 17:05:22,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:05:22,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:05:22,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:05:22,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:05:22,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22" (1/1) ... [2020-08-18 17:05:22,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22" (1/1) ... [2020-08-18 17:05:22,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22" (1/1) ... [2020-08-18 17:05:22,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22" (1/1) ... [2020-08-18 17:05:22,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22" (1/1) ... [2020-08-18 17:05:22,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22" (1/1) ... [2020-08-18 17:05:22,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22" (1/1) ... [2020-08-18 17:05:22,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:05:22,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:05:22,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:05:22,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:05:22,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22" (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 17:05:22,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:05:22,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:05:22,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:05:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:05:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:05:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:05:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:05:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:05:22,767 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:05:22,767 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:05:22,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:05:22 BoogieIcfgContainer [2020-08-18 17:05:22,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:05:22,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:05:22,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:05:22,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:05:22,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:05:22" (1/3) ... [2020-08-18 17:05:22,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbb3305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:05:22, skipping insertion in model container [2020-08-18 17:05:22,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:22" (2/3) ... [2020-08-18 17:05:22,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbb3305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:05:22, skipping insertion in model container [2020-08-18 17:05:22,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:05:22" (3/3) ... [2020-08-18 17:05:22,780 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-18 17:05:22,791 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:05:22,798 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:05:22,816 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:05:22,856 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:05:22,857 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:05:22,857 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:05:22,857 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:05:22,858 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:05:22,858 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:05:22,858 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:05:22,858 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:05:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-18 17:05:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 17:05:22,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:22,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:22,892 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:22,900 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-18 17:05:22,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:22,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889040753] [2020-08-18 17:05:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,139 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 17:05:23,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889040753] [2020-08-18 17:05:23,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:23,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098330166] [2020-08-18 17:05:23,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:23,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:23,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,163 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-18 17:05:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,218 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-18 17:05:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:23,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 17:05:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,232 INFO L225 Difference]: With dead ends: 57 [2020-08-18 17:05:23,232 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 17:05:23,236 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 17:05:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 17:05:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-18 17:05:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 17:05:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-18 17:05:23,277 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-18 17:05:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,278 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-18 17:05:23,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,278 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-18 17:05:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 17:05:23,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:23,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:05:23,280 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-18 17:05:23,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143704757] [2020-08-18 17:05:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,332 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 17:05:23,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143704757] [2020-08-18 17:05:23,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:23,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522638795] [2020-08-18 17:05:23,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:23,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:23,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,337 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-18 17:05:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,371 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-18 17:05:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:23,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 17:05:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,373 INFO L225 Difference]: With dead ends: 67 [2020-08-18 17:05:23,373 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 17:05:23,375 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 17:05:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 17:05:23,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-18 17:05:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 17:05:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-18 17:05:23,384 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-18 17:05:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,384 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-18 17:05:23,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-18 17:05:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 17:05:23,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:23,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:05:23,387 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-18 17:05:23,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489601682] [2020-08-18 17:05:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,431 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 17:05:23,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489601682] [2020-08-18 17:05:23,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:23,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130140462] [2020-08-18 17:05:23,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:23,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:23,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,434 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-18 17:05:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,455 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-18 17:05:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:23,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 17:05:23,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,458 INFO L225 Difference]: With dead ends: 63 [2020-08-18 17:05:23,458 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 17:05:23,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 17:05:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-18 17:05:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 17:05:23,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-18 17:05:23,469 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-18 17:05:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,470 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-18 17:05:23,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,470 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-18 17:05:23,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 17:05:23,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:23,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:05:23,472 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-18 17:05:23,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30368559] [2020-08-18 17:05:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,514 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 17:05:23,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30368559] [2020-08-18 17:05:23,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:23,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207723449] [2020-08-18 17:05:23,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:23,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:23,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,517 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-18 17:05:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,542 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-18 17:05:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:23,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 17:05:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,545 INFO L225 Difference]: With dead ends: 76 [2020-08-18 17:05:23,545 INFO L226 Difference]: Without dead ends: 74 [2020-08-18 17:05:23,546 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 17:05:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-18 17:05:23,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-18 17:05:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 17:05:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-18 17:05:23,557 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-18 17:05:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,557 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-18 17:05:23,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-18 17:05:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 17:05:23,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:23,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:05:23,560 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-18 17:05:23,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607613156] [2020-08-18 17:05:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,608 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 17:05:23,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607613156] [2020-08-18 17:05:23,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:23,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50748510] [2020-08-18 17:05:23,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:23,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:23,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,611 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-18 17:05:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,641 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-18 17:05:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:23,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 17:05:23,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,643 INFO L225 Difference]: With dead ends: 124 [2020-08-18 17:05:23,643 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 17:05:23,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 17:05:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-18 17:05:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 17:05:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-18 17:05:23,655 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-18 17:05:23,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,655 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-18 17:05:23,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-18 17:05:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:05:23,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,657 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 17:05:23,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:05:23,658 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-18 17:05:23,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816317337] [2020-08-18 17:05:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,712 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 17:05:23,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816317337] [2020-08-18 17:05:23,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:23,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353980051] [2020-08-18 17:05:23,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:23,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:23,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,719 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-18 17:05:23,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,772 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-18 17:05:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:23,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 17:05:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,774 INFO L225 Difference]: With dead ends: 111 [2020-08-18 17:05:23,774 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 17:05:23,775 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 17:05:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 17:05:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 17:05:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 17:05:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-18 17:05:23,786 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-18 17:05:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,787 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-18 17:05:23,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-18 17:05:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:05:23,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,788 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 17:05:23,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:05:23,789 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,790 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-18 17:05:23,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561659421] [2020-08-18 17:05:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,840 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 17:05:23,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561659421] [2020-08-18 17:05:23,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:23,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839557143] [2020-08-18 17:05:23,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:23,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:23,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,843 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-18 17:05:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,866 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-18 17:05:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:23,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 17:05:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,870 INFO L225 Difference]: With dead ends: 132 [2020-08-18 17:05:23,871 INFO L226 Difference]: Without dead ends: 130 [2020-08-18 17:05:23,871 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 17:05:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-18 17:05:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-18 17:05:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 17:05:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-18 17:05:23,886 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-18 17:05:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,886 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-18 17:05:23,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-18 17:05:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:05:23,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,888 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 17:05:23,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:05:23,889 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-18 17:05:23,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441200221] [2020-08-18 17:05:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,924 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 17:05:23,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441200221] [2020-08-18 17:05:23,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:23,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356653987] [2020-08-18 17:05:23,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:23,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,927 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-18 17:05:23,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,950 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-18 17:05:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:23,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 17:05:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,953 INFO L225 Difference]: With dead ends: 232 [2020-08-18 17:05:23,953 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 17:05:23,954 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 17:05:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 17:05:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 17:05:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 17:05:23,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-18 17:05:23,970 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-18 17:05:23,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,971 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-18 17:05:23,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,971 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-18 17:05:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:05:23,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,973 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 17:05:23,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:05:23,974 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-18 17:05:23,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807060061] [2020-08-18 17:05:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,038 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 17:05:24,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807060061] [2020-08-18 17:05:24,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:24,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:24,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351381224] [2020-08-18 17:05:24,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:24,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:24,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:24,043 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-18 17:05:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:24,086 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-18 17:05:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:24,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 17:05:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:24,090 INFO L225 Difference]: With dead ends: 204 [2020-08-18 17:05:24,091 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 17:05:24,092 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 17:05:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 17:05:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-18 17:05:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 17:05:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-18 17:05:24,116 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-18 17:05:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:24,120 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-18 17:05:24,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-18 17:05:24,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:05:24,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:24,124 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 17:05:24,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:05:24,124 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-18 17:05:24,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:24,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230966135] [2020-08-18 17:05:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,170 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 17:05:24,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230966135] [2020-08-18 17:05:24,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:24,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:24,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265077334] [2020-08-18 17:05:24,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:24,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:24,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:24,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:24,173 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-18 17:05:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:24,206 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-18 17:05:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:24,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 17:05:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:24,212 INFO L225 Difference]: With dead ends: 236 [2020-08-18 17:05:24,212 INFO L226 Difference]: Without dead ends: 234 [2020-08-18 17:05:24,212 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 17:05:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-18 17:05:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-18 17:05:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 17:05:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-18 17:05:24,226 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-18 17:05:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:24,226 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-18 17:05:24,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-18 17:05:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:05:24,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:24,228 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 17:05:24,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:05:24,229 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:24,229 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-18 17:05:24,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:24,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192242999] [2020-08-18 17:05:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,256 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 17:05:24,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192242999] [2020-08-18 17:05:24,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:24,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:24,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153783100] [2020-08-18 17:05:24,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:24,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:24,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:24,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:24,259 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-18 17:05:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:24,287 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-18 17:05:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:24,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 17:05:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:24,289 INFO L225 Difference]: With dead ends: 444 [2020-08-18 17:05:24,289 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 17:05:24,290 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 17:05:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 17:05:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 17:05:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 17:05:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-18 17:05:24,304 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-18 17:05:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:24,304 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-18 17:05:24,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-18 17:05:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:05:24,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:24,310 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 17:05:24,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:05:24,311 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:24,311 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-18 17:05:24,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:24,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50019699] [2020-08-18 17:05:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,332 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 17:05:24,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50019699] [2020-08-18 17:05:24,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:24,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:24,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132073788] [2020-08-18 17:05:24,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:24,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:24,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:24,334 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-18 17:05:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:24,352 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-18 17:05:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:24,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 17:05:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:24,354 INFO L225 Difference]: With dead ends: 384 [2020-08-18 17:05:24,354 INFO L226 Difference]: Without dead ends: 266 [2020-08-18 17:05:24,355 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 17:05:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-18 17:05:24,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-18 17:05:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-18 17:05:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-18 17:05:24,367 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-18 17:05:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:24,367 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-18 17:05:24,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-18 17:05:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:05:24,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:24,369 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 17:05:24,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:05:24,369 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:24,370 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-18 17:05:24,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:24,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530229047] [2020-08-18 17:05:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,419 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 17:05:24,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530229047] [2020-08-18 17:05:24,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:24,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:24,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779546362] [2020-08-18 17:05:24,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:24,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:24,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:24,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:24,422 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-18 17:05:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:24,458 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-18 17:05:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:24,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 17:05:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:24,461 INFO L225 Difference]: With dead ends: 426 [2020-08-18 17:05:24,461 INFO L226 Difference]: Without dead ends: 424 [2020-08-18 17:05:24,462 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 17:05:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-18 17:05:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-18 17:05:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 17:05:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-18 17:05:24,476 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-18 17:05:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:24,476 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-18 17:05:24,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-18 17:05:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:05:24,478 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:24,478 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 17:05:24,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:05:24,478 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-18 17:05:24,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:24,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362357292] [2020-08-18 17:05:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:24,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362357292] [2020-08-18 17:05:24,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:24,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:24,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858973746] [2020-08-18 17:05:24,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:24,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:24,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:24,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:24,501 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-18 17:05:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:24,525 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-18 17:05:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:24,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 17:05:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:24,526 INFO L225 Difference]: With dead ends: 856 [2020-08-18 17:05:24,526 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:05:24,528 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 17:05:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:05:24,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:05:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:05:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:05:24,529 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-18 17:05:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:24,529 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:05:24,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:05:24,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:05:24,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:05:24,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:05:24,554 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 17:05:24,554 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:05:24,554 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:05:24,555 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:05:24,555 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:05:24,555 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:05:24,555 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-18 17:05:24,555 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-18 17:05:24,555 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-18 17:05:24,555 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 17:05:24,555 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-18 17:05:24,556 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 17:05:24,556 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 17:05:24,556 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 17:05:24,556 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 17:05:24,556 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 17:05:24,556 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-18 17:05:24,556 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 17:05:24,556 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-18 17:05:24,557 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-18 17:05:24,557 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-18 17:05:24,557 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-18 17:05:24,557 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-18 17:05:24,557 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 17:05:24,557 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-18 17:05:24,557 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-18 17:05:24,558 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-18 17:05:24,558 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-18 17:05:24,558 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 17:05:24,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:05:24 BoogieIcfgContainer [2020-08-18 17:05:24,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:05:24,571 INFO L168 Benchmark]: Toolchain (without parser) took 2552.70 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 101.6 MB in the beginning and 144.2 MB in the end (delta: -42.6 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:24,572 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:05:24,573 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.19 ms. Allocated memory is still 139.5 MB. Free memory was 101.1 MB in the beginning and 91.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:24,574 INFO L168 Benchmark]: Boogie Preprocessor took 135.52 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 91.2 MB in the beginning and 181.9 MB in the end (delta: -90.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:24,575 INFO L168 Benchmark]: RCFGBuilder took 312.14 ms. Allocated memory is still 203.9 MB. Free memory was 181.9 MB in the beginning and 167.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:24,576 INFO L168 Benchmark]: TraceAbstraction took 1796.15 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 167.0 MB in the beginning and 144.2 MB in the end (delta: 22.8 MB). Peak memory consumption was 54.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:24,579 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.19 ms. Allocated memory is still 139.5 MB. Free memory was 101.1 MB in the beginning and 91.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.52 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 91.2 MB in the beginning and 181.9 MB in the end (delta: -90.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.14 ms. Allocated memory is still 203.9 MB. Free memory was 181.9 MB in the beginning and 167.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1796.15 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 167.0 MB in the beginning and 144.2 MB in the end (delta: 22.8 MB). Peak memory consumption was 54.2 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: 1.6s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, 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, 0.2s 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, 0.4s 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...