/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:07:03,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:07:03,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:07:03,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:07:03,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:07:04,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:07:04,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:07:04,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:07:04,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:07:04,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:07:04,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:07:04,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:07:04,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:07:04,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:07:04,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:07:04,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:07:04,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:07:04,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:07:04,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:07:04,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:07:04,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:07:04,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:07:04,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:07:04,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:07:04,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:07:04,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:07:04,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:07:04,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:07:04,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:07:04,096 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:07:04,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:07:04,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:07:04,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:07:04,099 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:07:04,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:07:04,099 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:07:04,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:07:04,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:07:04,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:07:04,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:07:04,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:07:04,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:07:04,102 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:07:04,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:07:04,102 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:07:04,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:07:04,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:07:04,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:07:04,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:07:04,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:07:04,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:04,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:07:04,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:07:04,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:07:04,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:07:04,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:07:04,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:07:04,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:07:04,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:07:04,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:07:04,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:07:04,418 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:07:04,424 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:07:04,425 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:07:04,425 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-18 21:07:04,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98e9a9347/72bde33247db40e89957b90596f5f962/FLAG9f2b33a73 [2020-08-18 21:07:04,942 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:07:04,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-18 21:07:04,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98e9a9347/72bde33247db40e89957b90596f5f962/FLAG9f2b33a73 [2020-08-18 21:07:05,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98e9a9347/72bde33247db40e89957b90596f5f962 [2020-08-18 21:07:05,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:07:05,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:07:05,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:05,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:07:05,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:07:05,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11cafb76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05, skipping insertion in model container [2020-08-18 21:07:05,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:07:05,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:07:05,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:05,588 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:07:05,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:05,635 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:07:05,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05 WrapperNode [2020-08-18 21:07:05,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:05,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:07:05,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:07:05,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:07:05,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05" (1/1) ... [2020-08-18 21:07:05,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:07:05,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:07:05,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:07:05,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:07:05,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:07:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:07:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:07:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:07:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:07:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:07:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:07:05,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:07:06,107 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:07:06,107 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:07:06,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:06 BoogieIcfgContainer [2020-08-18 21:07:06,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:07:06,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:07:06,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:07:06,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:07:06,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:07:05" (1/3) ... [2020-08-18 21:07:06,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd5f28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:06, skipping insertion in model container [2020-08-18 21:07:06,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:05" (2/3) ... [2020-08-18 21:07:06,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd5f28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:06, skipping insertion in model container [2020-08-18 21:07:06,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:06" (3/3) ... [2020-08-18 21:07:06,121 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-18 21:07:06,134 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:07:06,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:07:06,166 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:07:06,197 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:07:06,197 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:07:06,197 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:07:06,197 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:07:06,198 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:07:06,198 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:07:06,198 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:07:06,198 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:07:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-18 21:07:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:07:06,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:06,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:06,230 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:06,237 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-18 21:07:06,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:06,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270157781] [2020-08-18 21:07:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:06,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270157781] [2020-08-18 21:07:06,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:06,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:06,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396255209] [2020-08-18 21:07:06,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:06,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:06,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,494 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-18 21:07:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:06,559 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-18 21:07:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:06,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:07:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:06,574 INFO L225 Difference]: With dead ends: 81 [2020-08-18 21:07:06,575 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 21:07:06,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 21:07:06,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-18 21:07:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 21:07:06,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-18 21:07:06,630 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-18 21:07:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:06,631 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-18 21:07:06,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-18 21:07:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:07:06,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:06,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:06,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:07:06,634 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:06,635 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-18 21:07:06,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:06,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351068275] [2020-08-18 21:07:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:06,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351068275] [2020-08-18 21:07:06,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:06,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:06,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373923967] [2020-08-18 21:07:06,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:06,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:06,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,714 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-18 21:07:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:06,754 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-18 21:07:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:06,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:07:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:06,757 INFO L225 Difference]: With dead ends: 107 [2020-08-18 21:07:06,757 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 21:07:06,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 21:07:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-18 21:07:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 21:07:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-18 21:07:06,770 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-18 21:07:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:06,770 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-18 21:07:06,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-18 21:07:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:07:06,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:06,773 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] [2020-08-18 21:07:06,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:07:06,773 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-18 21:07:06,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:06,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408530706] [2020-08-18 21:07:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:06,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408530706] [2020-08-18 21:07:06,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:06,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:06,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027040133] [2020-08-18 21:07:06,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:06,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:06,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:06,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,833 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-18 21:07:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:06,870 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-18 21:07:06,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:06,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:07:06,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:06,875 INFO L225 Difference]: With dead ends: 99 [2020-08-18 21:07:06,876 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 21:07:06,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 21:07:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-18 21:07:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 21:07:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-18 21:07:06,894 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-18 21:07:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:06,895 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-18 21:07:06,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-18 21:07:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:07:06,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:06,898 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] [2020-08-18 21:07:06,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:07:06,898 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:06,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:06,899 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-18 21:07:06,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:06,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029225914] [2020-08-18 21:07:06,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:06,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029225914] [2020-08-18 21:07:06,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:06,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:06,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780670061] [2020-08-18 21:07:06,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:06,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:06,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:06,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,969 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-18 21:07:06,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:06,988 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-18 21:07:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:06,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:07:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:06,990 INFO L225 Difference]: With dead ends: 124 [2020-08-18 21:07:06,990 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 21:07:06,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 21:07:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-18 21:07:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 21:07:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-18 21:07:07,003 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-18 21:07:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,003 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-18 21:07:07,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,003 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-18 21:07:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:07:07,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,005 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] [2020-08-18 21:07:07,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:07:07,005 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,006 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-18 21:07:07,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576032134] [2020-08-18 21:07:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576032134] [2020-08-18 21:07:07,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714962627] [2020-08-18 21:07:07,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,071 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-18 21:07:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,099 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-18 21:07:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 21:07:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,101 INFO L225 Difference]: With dead ends: 204 [2020-08-18 21:07:07,103 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 21:07:07,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 21:07:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-18 21:07:07,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-18 21:07:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-18 21:07:07,127 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-18 21:07:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,127 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-18 21:07:07,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-18 21:07:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:07:07,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:07:07,130 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-18 21:07:07,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895631023] [2020-08-18 21:07:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895631023] [2020-08-18 21:07:07,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931290413] [2020-08-18 21:07:07,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,164 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-18 21:07:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,181 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-18 21:07:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:07:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,184 INFO L225 Difference]: With dead ends: 183 [2020-08-18 21:07:07,184 INFO L226 Difference]: Without dead ends: 126 [2020-08-18 21:07:07,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-18 21:07:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-18 21:07:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 21:07:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-18 21:07:07,197 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-18 21:07:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,197 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-18 21:07:07,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-18 21:07:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:07:07,199 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:07:07,200 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-18 21:07:07,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392652810] [2020-08-18 21:07:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392652810] [2020-08-18 21:07:07,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209813245] [2020-08-18 21:07:07,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,277 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-18 21:07:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,293 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-18 21:07:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:07:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,296 INFO L225 Difference]: With dead ends: 228 [2020-08-18 21:07:07,296 INFO L226 Difference]: Without dead ends: 226 [2020-08-18 21:07:07,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-18 21:07:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-18 21:07:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 21:07:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-18 21:07:07,309 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-18 21:07:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,310 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-18 21:07:07,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-18 21:07:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 21:07:07,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,312 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, 1] [2020-08-18 21:07:07,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:07:07,312 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-18 21:07:07,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341128554] [2020-08-18 21:07:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341128554] [2020-08-18 21:07:07,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488317019] [2020-08-18 21:07:07,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,344 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-18 21:07:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,363 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-18 21:07:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 21:07:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,366 INFO L225 Difference]: With dead ends: 392 [2020-08-18 21:07:07,366 INFO L226 Difference]: Without dead ends: 234 [2020-08-18 21:07:07,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-18 21:07:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-18 21:07:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-18 21:07:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-18 21:07:07,381 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-18 21:07:07,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,382 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-18 21:07:07,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-18 21:07:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:07:07,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:07:07,384 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-18 21:07:07,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385905540] [2020-08-18 21:07:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385905540] [2020-08-18 21:07:07,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026940886] [2020-08-18 21:07:07,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,415 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-18 21:07:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,432 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-18 21:07:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:07:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,434 INFO L225 Difference]: With dead ends: 348 [2020-08-18 21:07:07,435 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 21:07:07,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 21:07:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-18 21:07:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-18 21:07:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-18 21:07:07,447 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-18 21:07:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,447 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-18 21:07:07,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-18 21:07:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:07:07,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:07:07,450 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,450 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-18 21:07:07,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487823061] [2020-08-18 21:07:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487823061] [2020-08-18 21:07:07,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733267687] [2020-08-18 21:07:07,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,475 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-18 21:07:07,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,503 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-18 21:07:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:07:07,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,507 INFO L225 Difference]: With dead ends: 428 [2020-08-18 21:07:07,507 INFO L226 Difference]: Without dead ends: 426 [2020-08-18 21:07:07,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-18 21:07:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-18 21:07:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-18 21:07:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-18 21:07:07,519 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-18 21:07:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,520 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-18 21:07:07,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-18 21:07:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 21:07:07,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:07:07,522 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,522 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-18 21:07:07,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536009381] [2020-08-18 21:07:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536009381] [2020-08-18 21:07:07,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444254742] [2020-08-18 21:07:07,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,548 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-18 21:07:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,570 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-18 21:07:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 21:07:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,573 INFO L225 Difference]: With dead ends: 764 [2020-08-18 21:07:07,573 INFO L226 Difference]: Without dead ends: 450 [2020-08-18 21:07:07,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-18 21:07:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-18 21:07:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-18 21:07:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-18 21:07:07,590 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-18 21:07:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,590 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-18 21:07:07,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-18 21:07:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:07:07,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:07:07,592 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-18 21:07:07,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180982027] [2020-08-18 21:07:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180982027] [2020-08-18 21:07:07,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611309509] [2020-08-18 21:07:07,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,616 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-18 21:07:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,634 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-18 21:07:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:07:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,637 INFO L225 Difference]: With dead ends: 672 [2020-08-18 21:07:07,637 INFO L226 Difference]: Without dead ends: 458 [2020-08-18 21:07:07,638 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 [2020-08-18 21:07:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-18 21:07:07,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-18 21:07:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-18 21:07:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-18 21:07:07,651 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-18 21:07:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,651 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-18 21:07:07,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-18 21:07:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:07:07,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:07:07,653 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-18 21:07:07,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288508281] [2020-08-18 21:07:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288508281] [2020-08-18 21:07:07,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235944318] [2020-08-18 21:07:07,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,677 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-18 21:07:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,698 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-18 21:07:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:07:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,702 INFO L225 Difference]: With dead ends: 812 [2020-08-18 21:07:07,702 INFO L226 Difference]: Without dead ends: 810 [2020-08-18 21:07:07,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-18 21:07:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-18 21:07:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-18 21:07:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-18 21:07:07,721 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-18 21:07:07,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,721 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-18 21:07:07,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-18 21:07:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:07:07,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:07:07,723 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-18 21:07:07,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553625213] [2020-08-18 21:07:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553625213] [2020-08-18 21:07:07,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605775837] [2020-08-18 21:07:07,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,757 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-18 21:07:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,794 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-18 21:07:07,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 21:07:07,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,800 INFO L225 Difference]: With dead ends: 1500 [2020-08-18 21:07:07,800 INFO L226 Difference]: Without dead ends: 874 [2020-08-18 21:07:07,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-18 21:07:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-18 21:07:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-18 21:07:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-18 21:07:07,831 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-18 21:07:07,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,831 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-18 21:07:07,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-18 21:07:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:07:07,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:07:07,834 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-18 21:07:07,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525615917] [2020-08-18 21:07:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525615917] [2020-08-18 21:07:07,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102553268] [2020-08-18 21:07:07,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,859 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-18 21:07:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,887 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-18 21:07:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:07:07,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:07,892 INFO L225 Difference]: With dead ends: 1308 [2020-08-18 21:07:07,893 INFO L226 Difference]: Without dead ends: 890 [2020-08-18 21:07:07,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-18 21:07:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-18 21:07:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-18 21:07:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-18 21:07:07,935 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-18 21:07:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:07,936 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-18 21:07:07,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-18 21:07:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:07:07,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:07,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:07,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:07:07,938 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:07,938 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-18 21:07:07,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:07,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223806487] [2020-08-18 21:07:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:07,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223806487] [2020-08-18 21:07:07,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:07,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:07,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108503035] [2020-08-18 21:07:07,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:07,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:07,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:07,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:07,963 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-18 21:07:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:07,993 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-18 21:07:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:07,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:07:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:08,001 INFO L225 Difference]: With dead ends: 1548 [2020-08-18 21:07:08,001 INFO L226 Difference]: Without dead ends: 1546 [2020-08-18 21:07:08,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-18 21:07:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-18 21:07:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-18 21:07:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-18 21:07:08,037 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-18 21:07:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:08,038 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-18 21:07:08,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-18 21:07:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:07:08,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:08,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:08,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:07:08,041 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:08,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:08,041 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-18 21:07:08,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:08,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292535406] [2020-08-18 21:07:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:08,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292535406] [2020-08-18 21:07:08,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:08,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:08,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700458540] [2020-08-18 21:07:08,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:08,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:08,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,062 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-18 21:07:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:08,100 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-18 21:07:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:08,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 21:07:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:08,109 INFO L225 Difference]: With dead ends: 2956 [2020-08-18 21:07:08,109 INFO L226 Difference]: Without dead ends: 1706 [2020-08-18 21:07:08,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-18 21:07:08,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-18 21:07:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-18 21:07:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-18 21:07:08,158 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-18 21:07:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:08,159 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-18 21:07:08,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-18 21:07:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:07:08,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:08,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:08,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 21:07:08,162 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-18 21:07:08,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:08,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205489668] [2020-08-18 21:07:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:08,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205489668] [2020-08-18 21:07:08,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:08,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:08,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642658652] [2020-08-18 21:07:08,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:08,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,183 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-18 21:07:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:08,218 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-18 21:07:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:08,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:07:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:08,227 INFO L225 Difference]: With dead ends: 2556 [2020-08-18 21:07:08,227 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 21:07:08,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 21:07:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-18 21:07:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-18 21:07:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-18 21:07:08,277 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-18 21:07:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:08,277 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-18 21:07:08,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-18 21:07:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:07:08,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:08,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:08,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 21:07:08,280 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:08,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:08,281 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-18 21:07:08,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:08,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756997041] [2020-08-18 21:07:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:08,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756997041] [2020-08-18 21:07:08,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:08,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:08,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314035794] [2020-08-18 21:07:08,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:08,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:08,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,301 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-18 21:07:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:08,359 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-18 21:07:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:08,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:07:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:08,372 INFO L225 Difference]: With dead ends: 2956 [2020-08-18 21:07:08,372 INFO L226 Difference]: Without dead ends: 2954 [2020-08-18 21:07:08,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-18 21:07:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-18 21:07:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-18 21:07:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-18 21:07:08,441 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-18 21:07:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:08,441 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-18 21:07:08,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-18 21:07:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:07:08,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:08,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:08,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 21:07:08,446 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:08,446 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-18 21:07:08,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:08,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588335797] [2020-08-18 21:07:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:08,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588335797] [2020-08-18 21:07:08,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:08,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:08,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861452486] [2020-08-18 21:07:08,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:08,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:08,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:08,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,470 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-18 21:07:08,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:08,525 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-18 21:07:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:08,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 21:07:08,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:08,539 INFO L225 Difference]: With dead ends: 5836 [2020-08-18 21:07:08,539 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 21:07:08,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 21:07:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-18 21:07:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-18 21:07:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-18 21:07:08,633 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-18 21:07:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:08,633 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-18 21:07:08,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-18 21:07:08,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:07:08,638 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:08,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:08,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 21:07:08,638 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:08,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-18 21:07:08,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:08,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765032421] [2020-08-18 21:07:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:08,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765032421] [2020-08-18 21:07:08,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:08,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:08,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143858960] [2020-08-18 21:07:08,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:08,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,658 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-18 21:07:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:08,726 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-18 21:07:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:08,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:07:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:08,739 INFO L225 Difference]: With dead ends: 5004 [2020-08-18 21:07:08,739 INFO L226 Difference]: Without dead ends: 3402 [2020-08-18 21:07:08,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-18 21:07:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-18 21:07:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-18 21:07:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-18 21:07:08,840 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-18 21:07:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:08,840 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-18 21:07:08,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-18 21:07:08,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:07:08,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:08,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:08,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 21:07:08,845 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:08,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-18 21:07:08,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:08,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683391807] [2020-08-18 21:07:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:08,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683391807] [2020-08-18 21:07:08,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:08,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:08,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845852592] [2020-08-18 21:07:08,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:08,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:08,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:08,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:08,879 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-18 21:07:08,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:08,965 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-18 21:07:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:08,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:07:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:09,011 INFO L225 Difference]: With dead ends: 9804 [2020-08-18 21:07:09,011 INFO L226 Difference]: Without dead ends: 6538 [2020-08-18 21:07:09,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-18 21:07:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-18 21:07:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-18 21:07:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-18 21:07:09,222 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-18 21:07:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:09,222 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-18 21:07:09,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-18 21:07:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 21:07:09,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:09,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:09,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 21:07:09,233 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:09,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-18 21:07:09,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:09,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361098103] [2020-08-18 21:07:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:09,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361098103] [2020-08-18 21:07:09,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:09,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:09,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514112272] [2020-08-18 21:07:09,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:09,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:09,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:09,322 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-18 21:07:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:09,419 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-18 21:07:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:09,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 21:07:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:09,434 INFO L225 Difference]: With dead ends: 7052 [2020-08-18 21:07:09,434 INFO L226 Difference]: Without dead ends: 7050 [2020-08-18 21:07:09,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-18 21:07:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-18 21:07:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-18 21:07:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-18 21:07:09,595 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-18 21:07:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:09,595 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-18 21:07:09,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-18 21:07:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:07:09,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:09,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:09,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 21:07:09,605 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-18 21:07:09,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:09,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411966107] [2020-08-18 21:07:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:09,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411966107] [2020-08-18 21:07:09,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:09,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:09,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055557501] [2020-08-18 21:07:09,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:09,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:09,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:09,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:09,626 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-18 21:07:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:09,823 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-18 21:07:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:09,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:07:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:09,846 INFO L225 Difference]: With dead ends: 10634 [2020-08-18 21:07:09,847 INFO L226 Difference]: Without dead ends: 10632 [2020-08-18 21:07:09,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:09,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-18 21:07:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-18 21:07:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-18 21:07:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-18 21:07:10,052 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-18 21:07:10,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:10,052 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-18 21:07:10,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-18 21:07:10,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 21:07:10,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:10,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:10,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 21:07:10,070 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:10,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:10,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-18 21:07:10,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:10,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033673230] [2020-08-18 21:07:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:10,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033673230] [2020-08-18 21:07:10,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:10,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:10,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595076619] [2020-08-18 21:07:10,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:10,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:10,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:10,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:10,091 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-18 21:07:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:10,275 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-18 21:07:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:10,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 21:07:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:10,276 INFO L225 Difference]: With dead ends: 22664 [2020-08-18 21:07:10,277 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:07:10,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:07:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:07:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:07:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:07:10,382 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-18 21:07:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:10,383 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:07:10,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:07:10,383 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:07:10,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 21:07:10,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:07:10,412 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:07:10,412 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:07:10,412 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:07:10,412 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:07:10,412 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:07:10,412 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:07:10,412 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,413 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-18 21:07:10,413 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,413 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-18 21:07:10,413 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,413 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-18 21:07:10,413 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,413 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-18 21:07:10,413 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,413 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,414 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-18 21:07:10,414 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-18 21:07:10,414 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-18 21:07:10,414 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,414 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-18 21:07:10,414 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,414 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-18 21:07:10,415 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-18 21:07:10,415 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-18 21:07:10,415 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-18 21:07:10,415 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,415 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,415 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,415 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-18 21:07:10,416 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,416 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,416 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-18 21:07:10,416 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-18 21:07:10,416 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-18 21:07:10,417 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,417 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,417 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-18 21:07:10,417 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-18 21:07:10,417 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,417 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 21:07:10,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:07:10 BoogieIcfgContainer [2020-08-18 21:07:10,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:07:10,434 INFO L168 Benchmark]: Toolchain (without parser) took 5123.83 ms. Allocated memory was 148.4 MB in the beginning and 334.0 MB in the end (delta: 185.6 MB). Free memory was 102.9 MB in the beginning and 268.7 MB in the end (delta: -165.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:10,435 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 148.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:07:10,435 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.50 ms. Allocated memory is still 148.4 MB. Free memory was 102.7 MB in the beginning and 92.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:10,436 INFO L168 Benchmark]: Boogie Preprocessor took 129.63 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 92.2 MB in the beginning and 181.7 MB in the end (delta: -89.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:10,436 INFO L168 Benchmark]: RCFGBuilder took 346.15 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 163.5 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:10,437 INFO L168 Benchmark]: TraceAbstraction took 4317.78 ms. Allocated memory was 204.5 MB in the beginning and 334.0 MB in the end (delta: 129.5 MB). Free memory was 162.9 MB in the beginning and 268.7 MB in the end (delta: -105.8 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:10,440 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 148.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 325.50 ms. Allocated memory is still 148.4 MB. Free memory was 102.7 MB in the beginning and 92.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.63 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 92.2 MB in the beginning and 181.7 MB in the end (delta: -89.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.15 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 163.5 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4317.78 ms. Allocated memory was 204.5 MB in the beginning and 334.0 MB in the end (delta: 129.5 MB). Free memory was 162.9 MB in the beginning and 268.7 MB in the end (delta: -105.8 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 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, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...