/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:20:39,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:20:39,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:20:39,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:20:39,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:20:39,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:20:39,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:20:39,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:20:39,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:20:39,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:20:39,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:20:39,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:20:39,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:20:39,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:20:39,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:20:39,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:20:39,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:20:39,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:20:39,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:20:39,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:20:39,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:20:39,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:20:39,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:20:39,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:20:39,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:20:39,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:20:39,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:20:39,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:20:39,301 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 [2020-09-21 10:20:39,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:20:39,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:20:39,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:20:39,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:20:39,354 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:20:39,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:20:39,354 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:20:39,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:20:39,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:20:39,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:20:39,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:20:39,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:20:39,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:20:39,357 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:20:39,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:20:39,357 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:20:39,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:20:39,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:20:39,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:20:39,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:20:39,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:20:39,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:20:39,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:20:39,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:20:39,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:20:39,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:20:39,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:20:39,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:20:39,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:20:39,360 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 -> false [2020-09-21 10:20:39,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:20:39,856 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:20:39,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:20:39,867 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:20:39,867 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:20:39,868 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-09-21 10:20:39,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b5340bab/e4b8ba87608f40b3a900ab05b0886ada/FLAG82f14d03e [2020-09-21 10:20:40,524 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:20:40,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-09-21 10:20:40,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b5340bab/e4b8ba87608f40b3a900ab05b0886ada/FLAG82f14d03e [2020-09-21 10:20:40,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b5340bab/e4b8ba87608f40b3a900ab05b0886ada [2020-09-21 10:20:40,879 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:20:40,886 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:20:40,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:40,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:20:40,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:20:40,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:40" (1/1) ... [2020-09-21 10:20:40,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:40, skipping insertion in model container [2020-09-21 10:20:40,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:20:40" (1/1) ... [2020-09-21 10:20:40,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:20:40,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:20:41,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:41,189 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:20:41,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:20:41,233 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:20:41,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:41 WrapperNode [2020-09-21 10:20:41,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:20:41,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:20:41,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:20:41,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:20:41,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:41" (1/1) ... [2020-09-21 10:20:41,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:41" (1/1) ... [2020-09-21 10:20:41,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:41" (1/1) ... [2020-09-21 10:20:41,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:41" (1/1) ... [2020-09-21 10:20:41,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:41" (1/1) ... [2020-09-21 10:20:41,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:41" (1/1) ... [2020-09-21 10:20:41,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:41" (1/1) ... [2020-09-21 10:20:41,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:20:41,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:20:41,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:20:41,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:20:41,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:41" (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 [2020-09-21 10:20:41,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:20:41,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:20:41,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:20:41,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:20:41,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:20:41,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:20:41,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:20:41,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:20:41,745 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:20:41,745 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:20:41,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:41 BoogieIcfgContainer [2020-09-21 10:20:41,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:20:41,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:20:41,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:20:41,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:20:41,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:20:40" (1/3) ... [2020-09-21 10:20:41,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5675df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:41, skipping insertion in model container [2020-09-21 10:20:41,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:20:41" (2/3) ... [2020-09-21 10:20:41,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5675df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:20:41, skipping insertion in model container [2020-09-21 10:20:41,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:20:41" (3/3) ... [2020-09-21 10:20:41,762 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-09-21 10:20:41,775 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:20:41,785 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:20:41,809 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:20:41,841 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:20:41,841 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:20:41,842 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:20:41,842 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:20:41,842 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:20:41,842 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:20:41,842 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:20:41,842 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:20:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-09-21 10:20:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:20:41,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:41,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:41,876 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-09-21 10:20:41,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:41,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939690138] [2020-09-21 10:20:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939690138] [2020-09-21 10:20:42,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76364720] [2020-09-21 10:20:42,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,150 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-09-21 10:20:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,218 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-09-21 10:20:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-21 10:20:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,235 INFO L225 Difference]: With dead ends: 63 [2020-09-21 10:20:42,235 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 10:20:42,240 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 [2020-09-21 10:20:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 10:20:42,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-09-21 10:20:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 10:20:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-09-21 10:20:42,295 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-09-21 10:20:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,296 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-09-21 10:20:42,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,296 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-09-21 10:20:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:20:42,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:42,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:20:42,299 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-09-21 10:20:42,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338491179] [2020-09-21 10:20:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338491179] [2020-09-21 10:20:42,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178833446] [2020-09-21 10:20:42,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,366 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-09-21 10:20:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,395 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-09-21 10:20:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-21 10:20:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,397 INFO L225 Difference]: With dead ends: 77 [2020-09-21 10:20:42,397 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 10:20:42,399 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 [2020-09-21 10:20:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 10:20:42,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-09-21 10:20:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 10:20:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-09-21 10:20:42,408 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-09-21 10:20:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,409 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-09-21 10:20:42,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-09-21 10:20:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 10:20:42,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:42,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:20:42,411 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,412 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-09-21 10:20:42,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178441743] [2020-09-21 10:20:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178441743] [2020-09-21 10:20:42,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12863973] [2020-09-21 10:20:42,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,475 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-09-21 10:20:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,499 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-09-21 10:20:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-21 10:20:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,501 INFO L225 Difference]: With dead ends: 72 [2020-09-21 10:20:42,501 INFO L226 Difference]: Without dead ends: 51 [2020-09-21 10:20:42,502 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 [2020-09-21 10:20:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-21 10:20:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-09-21 10:20:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 10:20:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-09-21 10:20:42,511 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-09-21 10:20:42,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,512 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-09-21 10:20:42,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,512 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-09-21 10:20:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 10:20:42,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:42,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:20:42,514 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,515 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-09-21 10:20:42,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575927544] [2020-09-21 10:20:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575927544] [2020-09-21 10:20:42,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748945967] [2020-09-21 10:20:42,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,573 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-09-21 10:20:42,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,600 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-09-21 10:20:42,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-21 10:20:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,602 INFO L225 Difference]: With dead ends: 88 [2020-09-21 10:20:42,603 INFO L226 Difference]: Without dead ends: 86 [2020-09-21 10:20:42,603 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 [2020-09-21 10:20:42,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-21 10:20:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-21 10:20:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 10:20:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-09-21 10:20:42,615 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-09-21 10:20:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,615 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-09-21 10:20:42,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-09-21 10:20:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 10:20:42,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:42,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:20:42,618 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-09-21 10:20:42,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803747713] [2020-09-21 10:20:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803747713] [2020-09-21 10:20:42,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936352440] [2020-09-21 10:20:42,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,662 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-09-21 10:20:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,683 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-09-21 10:20:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-21 10:20:42,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,685 INFO L225 Difference]: With dead ends: 144 [2020-09-21 10:20:42,685 INFO L226 Difference]: Without dead ends: 88 [2020-09-21 10:20:42,686 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 [2020-09-21 10:20:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-21 10:20:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-09-21 10:20:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-21 10:20:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-09-21 10:20:42,697 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-09-21 10:20:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,697 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-09-21 10:20:42,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-09-21 10:20:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:20:42,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:42,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:20:42,699 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-09-21 10:20:42,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742397943] [2020-09-21 10:20:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742397943] [2020-09-21 10:20:42,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781963361] [2020-09-21 10:20:42,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,755 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-09-21 10:20:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,783 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-09-21 10:20:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-21 10:20:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,786 INFO L225 Difference]: With dead ends: 129 [2020-09-21 10:20:42,786 INFO L226 Difference]: Without dead ends: 90 [2020-09-21 10:20:42,787 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 [2020-09-21 10:20:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-21 10:20:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-09-21 10:20:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-21 10:20:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-09-21 10:20:42,799 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-09-21 10:20:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,799 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-09-21 10:20:42,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-09-21 10:20:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:20:42,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:42,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:20:42,802 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-09-21 10:20:42,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902016350] [2020-09-21 10:20:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:42,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902016350] [2020-09-21 10:20:42,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:42,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:42,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633654748] [2020-09-21 10:20:42,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:42,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:42,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:42,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:42,843 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-09-21 10:20:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:42,886 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-09-21 10:20:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:42,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-21 10:20:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:42,889 INFO L225 Difference]: With dead ends: 156 [2020-09-21 10:20:42,889 INFO L226 Difference]: Without dead ends: 154 [2020-09-21 10:20:42,890 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 [2020-09-21 10:20:42,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-21 10:20:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-09-21 10:20:42,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-21 10:20:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-09-21 10:20:42,922 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-09-21 10:20:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:42,922 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-09-21 10:20:42,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-09-21 10:20:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:20:42,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:42,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:42,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:20:42,926 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:42,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-09-21 10:20:42,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:42,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112132656] [2020-09-21 10:20:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112132656] [2020-09-21 10:20:43,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699566565] [2020-09-21 10:20:43,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,003 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-09-21 10:20:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,051 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-09-21 10:20:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-09-21 10:20:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,053 INFO L225 Difference]: With dead ends: 272 [2020-09-21 10:20:43,053 INFO L226 Difference]: Without dead ends: 162 [2020-09-21 10:20:43,055 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 [2020-09-21 10:20:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-21 10:20:43,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-09-21 10:20:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-21 10:20:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-09-21 10:20:43,068 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-09-21 10:20:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,069 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-09-21 10:20:43,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-09-21 10:20:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:20:43,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:20:43,071 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-09-21 10:20:43,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522253917] [2020-09-21 10:20:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522253917] [2020-09-21 10:20:43,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930262835] [2020-09-21 10:20:43,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,106 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-09-21 10:20:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,126 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-09-21 10:20:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 10:20:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,128 INFO L225 Difference]: With dead ends: 240 [2020-09-21 10:20:43,128 INFO L226 Difference]: Without dead ends: 166 [2020-09-21 10:20:43,129 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 [2020-09-21 10:20:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-21 10:20:43,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-09-21 10:20:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-21 10:20:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-09-21 10:20:43,140 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-09-21 10:20:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,141 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-09-21 10:20:43,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,141 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-09-21 10:20:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:20:43,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:20:43,143 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-09-21 10:20:43,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929664817] [2020-09-21 10:20:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929664817] [2020-09-21 10:20:43,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252133264] [2020-09-21 10:20:43,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,176 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-09-21 10:20:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,198 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-09-21 10:20:43,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 10:20:43,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,203 INFO L225 Difference]: With dead ends: 284 [2020-09-21 10:20:43,203 INFO L226 Difference]: Without dead ends: 282 [2020-09-21 10:20:43,204 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 [2020-09-21 10:20:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-21 10:20:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-09-21 10:20:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-09-21 10:20:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-09-21 10:20:43,216 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-09-21 10:20:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,216 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-09-21 10:20:43,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-09-21 10:20:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:20:43,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:20:43,219 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-09-21 10:20:43,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3684607] [2020-09-21 10:20:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3684607] [2020-09-21 10:20:43,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353497281] [2020-09-21 10:20:43,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,263 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-09-21 10:20:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,291 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-09-21 10:20:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-21 10:20:43,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,294 INFO L225 Difference]: With dead ends: 524 [2020-09-21 10:20:43,294 INFO L226 Difference]: Without dead ends: 306 [2020-09-21 10:20:43,295 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 [2020-09-21 10:20:43,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-09-21 10:20:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-09-21 10:20:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-09-21 10:20:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-09-21 10:20:43,310 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-09-21 10:20:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,310 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-09-21 10:20:43,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-09-21 10:20:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:20:43,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:20:43,313 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-09-21 10:20:43,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321355408] [2020-09-21 10:20:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321355408] [2020-09-21 10:20:43,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404249526] [2020-09-21 10:20:43,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,347 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-09-21 10:20:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,366 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-09-21 10:20:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 10:20:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,369 INFO L225 Difference]: With dead ends: 456 [2020-09-21 10:20:43,369 INFO L226 Difference]: Without dead ends: 314 [2020-09-21 10:20:43,370 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 [2020-09-21 10:20:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-09-21 10:20:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-09-21 10:20:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-09-21 10:20:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-09-21 10:20:43,385 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-09-21 10:20:43,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,385 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-09-21 10:20:43,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-09-21 10:20:43,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:20:43,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:20:43,387 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,388 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-09-21 10:20:43,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851950204] [2020-09-21 10:20:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851950204] [2020-09-21 10:20:43,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647338502] [2020-09-21 10:20:43,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,437 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-09-21 10:20:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,466 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-09-21 10:20:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 10:20:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,470 INFO L225 Difference]: With dead ends: 524 [2020-09-21 10:20:43,470 INFO L226 Difference]: Without dead ends: 522 [2020-09-21 10:20:43,471 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 [2020-09-21 10:20:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-09-21 10:20:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-09-21 10:20:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-09-21 10:20:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-09-21 10:20:43,488 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-09-21 10:20:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,488 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-09-21 10:20:43,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-09-21 10:20:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:20:43,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:20:43,491 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-09-21 10:20:43,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669392315] [2020-09-21 10:20:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669392315] [2020-09-21 10:20:43,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674307800] [2020-09-21 10:20:43,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,522 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-09-21 10:20:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,549 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-09-21 10:20:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 10:20:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,553 INFO L225 Difference]: With dead ends: 1020 [2020-09-21 10:20:43,553 INFO L226 Difference]: Without dead ends: 586 [2020-09-21 10:20:43,555 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 [2020-09-21 10:20:43,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-09-21 10:20:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-09-21 10:20:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-09-21 10:20:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-09-21 10:20:43,577 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-09-21 10:20:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,577 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-09-21 10:20:43,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-09-21 10:20:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:43,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:20:43,579 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-09-21 10:20:43,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275937408] [2020-09-21 10:20:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275937408] [2020-09-21 10:20:43,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549222154] [2020-09-21 10:20:43,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,609 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-09-21 10:20:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,632 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-09-21 10:20:43,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,633 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,636 INFO L225 Difference]: With dead ends: 876 [2020-09-21 10:20:43,637 INFO L226 Difference]: Without dead ends: 602 [2020-09-21 10:20:43,638 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 [2020-09-21 10:20:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-09-21 10:20:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-09-21 10:20:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-09-21 10:20:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-09-21 10:20:43,660 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-09-21 10:20:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,660 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-09-21 10:20:43,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-09-21 10:20:43,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:43,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:20:43,662 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,663 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-09-21 10:20:43,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774169058] [2020-09-21 10:20:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774169058] [2020-09-21 10:20:43,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225710110] [2020-09-21 10:20:43,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,699 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-09-21 10:20:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,735 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-09-21 10:20:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,741 INFO L225 Difference]: With dead ends: 970 [2020-09-21 10:20:43,741 INFO L226 Difference]: Without dead ends: 968 [2020-09-21 10:20:43,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-09-21 10:20:43,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-09-21 10:20:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-09-21 10:20:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-09-21 10:20:43,776 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-09-21 10:20:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,777 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-09-21 10:20:43,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-09-21 10:20:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:20:43,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:20:43,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:20:43,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:20:43,780 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:20:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:20:43,781 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-09-21 10:20:43,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:20:43,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573706855] [2020-09-21 10:20:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:20:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:20:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:20:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:20:43,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573706855] [2020-09-21 10:20:43,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:20:43,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:20:43,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565304883] [2020-09-21 10:20:43,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:20:43,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:20:43,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:20:43,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:20:43,810 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-09-21 10:20:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:20:43,860 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-09-21 10:20:43,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:20:43,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:20:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:20:43,862 INFO L225 Difference]: With dead ends: 1992 [2020-09-21 10:20:43,862 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:20:43,865 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 [2020-09-21 10:20:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:20:43,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:20:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:20:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:20:43,867 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-09-21 10:20:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:20:43,867 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:20:43,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:20:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:20:43,867 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:20:43,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:20:43,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:20:43,896 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 10:20:43,896 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:20:43,896 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:20:43,897 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:20:43,897 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:20:43,897 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:20:43,897 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-09-21 10:20:43,897 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-09-21 10:20:43,897 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,897 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-09-21 10:20:43,898 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-09-21 10:20:43,898 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-09-21 10:20:43,898 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,898 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,898 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,898 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-09-21 10:20:43,898 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-09-21 10:20:43,898 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,899 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-09-21 10:20:43,899 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-09-21 10:20:43,899 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-09-21 10:20:43,899 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,899 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-09-21 10:20:43,899 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-09-21 10:20:43,899 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-09-21 10:20:43,900 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-09-21 10:20:43,900 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,900 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,900 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,900 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-09-21 10:20:43,900 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,901 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-09-21 10:20:43,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:20:43 BoogieIcfgContainer [2020-09-21 10:20:43,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:20:43,925 INFO L168 Benchmark]: Toolchain (without parser) took 3041.99 ms. Allocated memory was 141.0 MB in the beginning and 243.3 MB in the end (delta: 102.2 MB). Free memory was 103.3 MB in the beginning and 206.7 MB in the end (delta: -103.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:20:43,926 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:20:43,927 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.18 ms. Allocated memory is still 141.0 MB. Free memory was 102.7 MB in the beginning and 92.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:43,928 INFO L168 Benchmark]: Boogie Preprocessor took 120.05 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 182.1 MB in the end (delta: -89.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:43,928 INFO L168 Benchmark]: RCFGBuilder took 396.16 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 166.5 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:20:43,929 INFO L168 Benchmark]: TraceAbstraction took 2164.93 ms. Allocated memory was 203.9 MB in the beginning and 243.3 MB in the end (delta: 39.3 MB). Free memory was 165.9 MB in the beginning and 206.9 MB in the end (delta: -41.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:20:43,932 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 344.18 ms. Allocated memory is still 141.0 MB. Free memory was 102.7 MB in the beginning and 92.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.05 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 182.1 MB in the end (delta: -89.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 396.16 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 166.5 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2164.93 ms. Allocated memory was 203.9 MB in the beginning and 243.3 MB in the end (delta: 39.3 MB). Free memory was 165.9 MB in the beginning and 206.9 MB in the end (delta: -41.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 923 SDtfs, 417 SDslu, 612 SDs, 0 SdLazy, 91 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 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...