/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:10:29,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:10:29,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:10:29,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 22:10:29,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:10:29,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:10:29,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:10:29,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:10:29,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:10:29,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:10:29,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:10:29,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:10:29,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:10:29,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:10:29,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:10:29,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:10:29,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:10:29,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:10:29,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:10:29,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:10:29,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:10:29,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:10:29,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:10:29,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:10:29,289 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:10:29,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:10:29,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:10:29,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:10:29,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:10:29,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:10:29,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:10:29,290 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:10:29,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:10:29,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:10:29,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:10:29,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:10:29,291 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:10:29,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:10:29,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:10:29,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:10:29,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:10:29,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:10:29,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:10:29,293 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 22:10:29,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:10:29,639 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:10:29,642 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:10:29,644 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:10:29,645 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:10:29,645 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-08-22 22:10:29,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0293c1be7/7925f30867c241c99c3f2d6308a03734/FLAGb86218717 [2020-08-22 22:10:30,172 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:10:30,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-08-22 22:10:30,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0293c1be7/7925f30867c241c99c3f2d6308a03734/FLAGb86218717 [2020-08-22 22:10:30,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0293c1be7/7925f30867c241c99c3f2d6308a03734 [2020-08-22 22:10:30,617 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:10:30,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:10:30,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:10:30,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:10:30,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:10:30,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:10:30" (1/1) ... [2020-08-22 22:10:30,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f6ed836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30, skipping insertion in model container [2020-08-22 22:10:30,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:10:30" (1/1) ... [2020-08-22 22:10:30,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:10:30,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:10:30,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:10:30,954 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:10:30,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:10:30,996 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:10:30,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30 WrapperNode [2020-08-22 22:10:30,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:10:30,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:10:30,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:10:30,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:10:31,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30" (1/1) ... [2020-08-22 22:10:31,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30" (1/1) ... [2020-08-22 22:10:31,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30" (1/1) ... [2020-08-22 22:10:31,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30" (1/1) ... [2020-08-22 22:10:31,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30" (1/1) ... [2020-08-22 22:10:31,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30" (1/1) ... [2020-08-22 22:10:31,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30" (1/1) ... [2020-08-22 22:10:31,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:10:31,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:10:31,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:10:31,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:10:31,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 22:10:31,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:10:31,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:10:31,236 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 22:10:31,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:10:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:10:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:10:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 22:10:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:10:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:10:31,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:10:31,424 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:10:31,425 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:10:31,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:10:31 BoogieIcfgContainer [2020-08-22 22:10:31,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:10:31,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:10:31,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:10:31,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:10:31,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:10:30" (1/3) ... [2020-08-22 22:10:31,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af1580e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:10:31, skipping insertion in model container [2020-08-22 22:10:31,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:30" (2/3) ... [2020-08-22 22:10:31,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af1580e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:10:31, skipping insertion in model container [2020-08-22 22:10:31,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:10:31" (3/3) ... [2020-08-22 22:10:31,443 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2020-08-22 22:10:31,457 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:10:31,467 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:10:31,485 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:10:31,513 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:10:31,513 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:10:31,513 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:10:31,513 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:10:31,514 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:10:31,514 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:10:31,515 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:10:31,515 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:10:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-22 22:10:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 22:10:31,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:31,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:31,543 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:31,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-08-22 22:10:31,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:31,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798253519] [2020-08-22 22:10:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:31,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:31,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:10:31,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798253519] [2020-08-22 22:10:31,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:10:31,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:10:31,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518221626] [2020-08-22 22:10:31,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:10:31,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:31,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:10:31,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:10:31,847 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-08-22 22:10:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:32,007 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-08-22 22:10:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:10:32,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 22:10:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:32,029 INFO L225 Difference]: With dead ends: 37 [2020-08-22 22:10:32,029 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 22:10:32,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:10:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 22:10:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-22 22:10:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 22:10:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-22 22:10:32,105 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-08-22 22:10:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:32,106 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-22 22:10:32,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:10:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-22 22:10:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 22:10:32,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:32,110 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:32,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:10:32,110 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:32,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-08-22 22:10:32,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:32,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102058781] [2020-08-22 22:10:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:10:32,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102058781] [2020-08-22 22:10:32,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:32,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 22:10:32,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369928866] [2020-08-22 22:10:32,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:10:32,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:32,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:10:32,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:10:32,307 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-22 22:10:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:32,378 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 22:10:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:10:32,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-22 22:10:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:32,381 INFO L225 Difference]: With dead ends: 34 [2020-08-22 22:10:32,381 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 22:10:32,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:10:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 22:10:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 22:10:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 22:10:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-22 22:10:32,397 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-08-22 22:10:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:32,398 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-22 22:10:32,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:10:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-22 22:10:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 22:10:32,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:32,400 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:32,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:10:32,401 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:32,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:32,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1463730447, now seen corresponding path program 2 times [2020-08-22 22:10:32,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:32,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179796114] [2020-08-22 22:10:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 22:10:32,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179796114] [2020-08-22 22:10:32,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:32,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:10:32,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792885385] [2020-08-22 22:10:32,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:10:32,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:32,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:10:32,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:10:32,631 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-08-22 22:10:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:32,709 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-08-22 22:10:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:10:32,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-08-22 22:10:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:32,712 INFO L225 Difference]: With dead ends: 39 [2020-08-22 22:10:32,712 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 22:10:32,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:10:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 22:10:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 22:10:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 22:10:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 22:10:32,727 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2020-08-22 22:10:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:32,727 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 22:10:32,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:10:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 22:10:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 22:10:32,730 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:32,730 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:32,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:10:32,731 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:32,731 INFO L82 PathProgramCache]: Analyzing trace with hash 23346727, now seen corresponding path program 3 times [2020-08-22 22:10:32,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:32,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58956165] [2020-08-22 22:10:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 22:10:32,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58956165] [2020-08-22 22:10:32,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:32,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:10:32,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280605586] [2020-08-22 22:10:32,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:10:32,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:32,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:10:32,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:10:32,976 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-08-22 22:10:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:33,115 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-08-22 22:10:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:10:33,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-22 22:10:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:33,117 INFO L225 Difference]: With dead ends: 44 [2020-08-22 22:10:33,118 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 22:10:33,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:10:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 22:10:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-08-22 22:10:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 22:10:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-08-22 22:10:33,131 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 40 [2020-08-22 22:10:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:33,131 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-08-22 22:10:33,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:10:33,132 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-08-22 22:10:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 22:10:33,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:33,134 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:33,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:10:33,134 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:33,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:33,135 INFO L82 PathProgramCache]: Analyzing trace with hash -649675855, now seen corresponding path program 4 times [2020-08-22 22:10:33,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:33,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645031056] [2020-08-22 22:10:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 22:10:33,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645031056] [2020-08-22 22:10:33,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:33,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:10:33,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204946541] [2020-08-22 22:10:33,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:10:33,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:33,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:10:33,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:10:33,351 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2020-08-22 22:10:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:33,465 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 22:10:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:10:33,466 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-08-22 22:10:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:33,468 INFO L225 Difference]: With dead ends: 49 [2020-08-22 22:10:33,468 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 22:10:33,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:10:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 22:10:33,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-22 22:10:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 22:10:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-22 22:10:33,481 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 48 [2020-08-22 22:10:33,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:33,481 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-22 22:10:33,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:10:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-22 22:10:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 22:10:33,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:33,484 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:33,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:10:33,484 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash 899977063, now seen corresponding path program 5 times [2020-08-22 22:10:33,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:33,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437581120] [2020-08-22 22:10:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 22:10:33,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437581120] [2020-08-22 22:10:33,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:33,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:10:33,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017877459] [2020-08-22 22:10:33,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:10:33,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:33,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:10:33,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:10:33,676 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 10 states. [2020-08-22 22:10:33,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:33,775 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-08-22 22:10:33,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:10:33,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-08-22 22:10:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:33,778 INFO L225 Difference]: With dead ends: 54 [2020-08-22 22:10:33,779 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 22:10:33,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:10:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 22:10:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 22:10:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 22:10:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 22:10:33,796 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 56 [2020-08-22 22:10:33,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:33,796 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 22:10:33,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:10:33,797 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 22:10:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 22:10:33,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:33,800 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:33,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:10:33,801 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:33,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1000802417, now seen corresponding path program 6 times [2020-08-22 22:10:33,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:33,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500407621] [2020-08-22 22:10:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:33,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 22:10:34,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500407621] [2020-08-22 22:10:34,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:34,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:10:34,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926346713] [2020-08-22 22:10:34,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:10:34,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:34,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:10:34,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:10:34,049 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 11 states. [2020-08-22 22:10:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:34,163 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-08-22 22:10:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 22:10:34,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-08-22 22:10:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:34,166 INFO L225 Difference]: With dead ends: 59 [2020-08-22 22:10:34,166 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 22:10:34,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:10:34,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 22:10:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-08-22 22:10:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 22:10:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-22 22:10:34,178 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 64 [2020-08-22 22:10:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:34,179 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-22 22:10:34,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:10:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-22 22:10:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 22:10:34,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:34,181 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:34,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:10:34,181 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:34,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1977618599, now seen corresponding path program 7 times [2020-08-22 22:10:34,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:34,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956222448] [2020-08-22 22:10:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 22:10:34,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956222448] [2020-08-22 22:10:34,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:34,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:10:34,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747243650] [2020-08-22 22:10:34,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:10:34,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:34,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:10:34,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:10:34,474 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2020-08-22 22:10:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:34,615 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 22:10:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:10:34,616 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-08-22 22:10:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:34,618 INFO L225 Difference]: With dead ends: 64 [2020-08-22 22:10:34,618 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 22:10:34,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-22 22:10:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 22:10:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-22 22:10:34,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 22:10:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-08-22 22:10:34,629 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 72 [2020-08-22 22:10:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:34,630 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-08-22 22:10:34,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:10:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-08-22 22:10:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 22:10:34,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:34,632 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:34,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:10:34,633 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:34,633 INFO L82 PathProgramCache]: Analyzing trace with hash 555623729, now seen corresponding path program 8 times [2020-08-22 22:10:34,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:34,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073242774] [2020-08-22 22:10:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:34,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 22:10:35,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073242774] [2020-08-22 22:10:35,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:35,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:10:35,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375111166] [2020-08-22 22:10:35,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:10:35,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:35,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:10:35,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:10:35,020 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2020-08-22 22:10:35,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:35,182 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-08-22 22:10:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 22:10:35,182 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-08-22 22:10:35,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:35,184 INFO L225 Difference]: With dead ends: 69 [2020-08-22 22:10:35,184 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 22:10:35,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:10:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 22:10:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 22:10:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 22:10:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 22:10:35,207 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 80 [2020-08-22 22:10:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:35,207 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 22:10:35,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:10:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 22:10:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 22:10:35,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:35,209 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:35,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:10:35,213 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:35,214 INFO L82 PathProgramCache]: Analyzing trace with hash 777699815, now seen corresponding path program 9 times [2020-08-22 22:10:35,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:35,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47986628] [2020-08-22 22:10:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 22:10:35,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47986628] [2020-08-22 22:10:35,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:35,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:10:35,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574358328] [2020-08-22 22:10:35,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:10:35,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:35,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:10:35,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:10:35,681 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 14 states. [2020-08-22 22:10:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:35,844 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-08-22 22:10:35,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:10:35,845 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2020-08-22 22:10:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:35,846 INFO L225 Difference]: With dead ends: 74 [2020-08-22 22:10:35,846 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 22:10:35,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:10:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 22:10:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-08-22 22:10:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 22:10:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-08-22 22:10:35,857 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 88 [2020-08-22 22:10:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:35,857 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-08-22 22:10:35,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:10:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-08-22 22:10:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 22:10:35,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:35,859 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:35,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:10:35,859 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2145915377, now seen corresponding path program 10 times [2020-08-22 22:10:35,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:35,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816661512] [2020-08-22 22:10:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:35,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 22:10:36,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816661512] [2020-08-22 22:10:36,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:36,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 22:10:36,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954262308] [2020-08-22 22:10:36,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 22:10:36,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 22:10:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 22:10:36,254 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 15 states. [2020-08-22 22:10:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:36,412 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-22 22:10:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 22:10:36,412 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2020-08-22 22:10:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:36,414 INFO L225 Difference]: With dead ends: 79 [2020-08-22 22:10:36,414 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 22:10:36,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-08-22 22:10:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 22:10:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-08-22 22:10:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 22:10:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-08-22 22:10:36,426 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 96 [2020-08-22 22:10:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:36,427 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-08-22 22:10:36,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 22:10:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-08-22 22:10:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 22:10:36,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:36,428 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:36,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:10:36,429 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1180214055, now seen corresponding path program 11 times [2020-08-22 22:10:36,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:36,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214878828] [2020-08-22 22:10:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 22:10:36,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214878828] [2020-08-22 22:10:36,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:36,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 22:10:36,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802365772] [2020-08-22 22:10:36,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 22:10:36,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:36,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 22:10:36,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 22:10:36,870 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 16 states. [2020-08-22 22:10:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:37,093 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-08-22 22:10:37,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 22:10:37,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-08-22 22:10:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:37,097 INFO L225 Difference]: With dead ends: 84 [2020-08-22 22:10:37,097 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 22:10:37,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-08-22 22:10:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 22:10:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-22 22:10:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 22:10:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-22 22:10:37,118 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 104 [2020-08-22 22:10:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:37,118 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-22 22:10:37,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 22:10:37,119 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-22 22:10:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 22:10:37,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:37,121 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:37,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 22:10:37,121 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:37,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1287598415, now seen corresponding path program 12 times [2020-08-22 22:10:37,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:37,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600898584] [2020-08-22 22:10:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 22:10:37,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600898584] [2020-08-22 22:10:37,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:37,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 22:10:37,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866114005] [2020-08-22 22:10:37,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 22:10:37,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:37,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 22:10:37,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 22:10:37,721 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-08-22 22:10:37,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:37,918 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-08-22 22:10:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 22:10:37,919 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-08-22 22:10:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:37,920 INFO L225 Difference]: With dead ends: 89 [2020-08-22 22:10:37,920 INFO L226 Difference]: Without dead ends: 83 [2020-08-22 22:10:37,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-08-22 22:10:37,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-22 22:10:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-08-22 22:10:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 22:10:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-08-22 22:10:37,935 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 112 [2020-08-22 22:10:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:37,935 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-08-22 22:10:37,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 22:10:37,936 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-08-22 22:10:37,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-22 22:10:37,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:37,939 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:37,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 22:10:37,939 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1612559463, now seen corresponding path program 13 times [2020-08-22 22:10:37,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:37,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932491707] [2020-08-22 22:10:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:37,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 22:10:38,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932491707] [2020-08-22 22:10:38,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:38,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 22:10:38,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378058595] [2020-08-22 22:10:38,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 22:10:38,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:38,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 22:10:38,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 22:10:38,524 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 18 states. [2020-08-22 22:10:38,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:38,727 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-22 22:10:38,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 22:10:38,728 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-08-22 22:10:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:38,729 INFO L225 Difference]: With dead ends: 94 [2020-08-22 22:10:38,730 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 22:10:38,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-08-22 22:10:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 22:10:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-08-22 22:10:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 22:10:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-08-22 22:10:38,739 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 120 [2020-08-22 22:10:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:38,740 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-08-22 22:10:38,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 22:10:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-08-22 22:10:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 22:10:38,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:38,742 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:38,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 22:10:38,742 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:38,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:38,743 INFO L82 PathProgramCache]: Analyzing trace with hash 996432753, now seen corresponding path program 14 times [2020-08-22 22:10:38,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:38,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104035359] [2020-08-22 22:10:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:38,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 22:10:39,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104035359] [2020-08-22 22:10:39,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:39,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 22:10:39,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272139759] [2020-08-22 22:10:39,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 22:10:39,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 22:10:39,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 22:10:39,611 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 19 states. [2020-08-22 22:10:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:39,927 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2020-08-22 22:10:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:10:39,928 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2020-08-22 22:10:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:39,930 INFO L225 Difference]: With dead ends: 99 [2020-08-22 22:10:39,930 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 22:10:39,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 22:10:39,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 22:10:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-22 22:10:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 22:10:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-22 22:10:39,948 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 128 [2020-08-22 22:10:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:39,949 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-22 22:10:39,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 22:10:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-22 22:10:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-22 22:10:39,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:39,953 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:39,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 22:10:39,953 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:39,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:39,954 INFO L82 PathProgramCache]: Analyzing trace with hash 418248103, now seen corresponding path program 15 times [2020-08-22 22:10:39,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:39,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089620672] [2020-08-22 22:10:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 22:10:40,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089620672] [2020-08-22 22:10:40,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:40,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 22:10:40,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251841879] [2020-08-22 22:10:40,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 22:10:40,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:40,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 22:10:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-22 22:10:40,652 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 20 states. [2020-08-22 22:10:40,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:40,956 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2020-08-22 22:10:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 22:10:40,956 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-08-22 22:10:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:40,958 INFO L225 Difference]: With dead ends: 104 [2020-08-22 22:10:40,958 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 22:10:40,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 22:10:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 22:10:40,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-08-22 22:10:40,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 22:10:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-08-22 22:10:40,971 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 136 [2020-08-22 22:10:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:40,973 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-08-22 22:10:40,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 22:10:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-08-22 22:10:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-08-22 22:10:40,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:40,976 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:40,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 22:10:40,976 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2106505265, now seen corresponding path program 16 times [2020-08-22 22:10:40,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:40,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378548037] [2020-08-22 22:10:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 22:10:41,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378548037] [2020-08-22 22:10:41,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:41,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 22:10:41,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879172797] [2020-08-22 22:10:41,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 22:10:41,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:41,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 22:10:41,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-22 22:10:41,872 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 21 states. [2020-08-22 22:10:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:42,111 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-08-22 22:10:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 22:10:42,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2020-08-22 22:10:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:42,114 INFO L225 Difference]: With dead ends: 109 [2020-08-22 22:10:42,114 INFO L226 Difference]: Without dead ends: 103 [2020-08-22 22:10:42,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 22:10:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-08-22 22:10:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-08-22 22:10:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 22:10:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-08-22 22:10:42,128 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 144 [2020-08-22 22:10:42,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:42,129 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-08-22 22:10:42,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 22:10:42,129 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-08-22 22:10:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 22:10:42,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:42,131 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:42,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 22:10:42,132 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1225615079, now seen corresponding path program 17 times [2020-08-22 22:10:42,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:42,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317699019] [2020-08-22 22:10:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:42,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 22:10:43,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317699019] [2020-08-22 22:10:43,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:43,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 22:10:43,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435731994] [2020-08-22 22:10:43,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 22:10:43,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:43,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 22:10:43,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:10:43,144 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 22 states. [2020-08-22 22:10:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:43,393 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2020-08-22 22:10:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 22:10:43,394 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 152 [2020-08-22 22:10:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:43,395 INFO L225 Difference]: With dead ends: 114 [2020-08-22 22:10:43,395 INFO L226 Difference]: Without dead ends: 108 [2020-08-22 22:10:43,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 22:10:43,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-22 22:10:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-08-22 22:10:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 22:10:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-08-22 22:10:43,406 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 152 [2020-08-22 22:10:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:43,407 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-08-22 22:10:43,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 22:10:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-08-22 22:10:43,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-08-22 22:10:43,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:43,409 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:43,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 22:10:43,409 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:43,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:43,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643855, now seen corresponding path program 18 times [2020-08-22 22:10:43,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:43,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703792761] [2020-08-22 22:10:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:43,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-22 22:10:44,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703792761] [2020-08-22 22:10:44,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:44,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 22:10:44,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91399342] [2020-08-22 22:10:44,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 22:10:44,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:44,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 22:10:44,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-22 22:10:44,461 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2020-08-22 22:10:44,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:44,777 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2020-08-22 22:10:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 22:10:44,778 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-08-22 22:10:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:44,781 INFO L225 Difference]: With dead ends: 119 [2020-08-22 22:10:44,782 INFO L226 Difference]: Without dead ends: 113 [2020-08-22 22:10:44,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 22:10:44,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-08-22 22:10:44,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-08-22 22:10:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 22:10:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-08-22 22:10:44,796 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 160 [2020-08-22 22:10:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:44,797 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-08-22 22:10:44,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 22:10:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-08-22 22:10:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 22:10:44,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:44,800 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:44,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 22:10:44,800 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:44,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1136658471, now seen corresponding path program 19 times [2020-08-22 22:10:44,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:44,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495082974] [2020-08-22 22:10:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:44,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-22 22:10:45,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495082974] [2020-08-22 22:10:45,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:45,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 22:10:45,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188441070] [2020-08-22 22:10:45,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 22:10:45,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:45,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 22:10:45,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-22 22:10:45,929 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 24 states. [2020-08-22 22:10:46,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:46,239 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2020-08-22 22:10:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 22:10:46,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 168 [2020-08-22 22:10:46,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:46,241 INFO L225 Difference]: With dead ends: 124 [2020-08-22 22:10:46,241 INFO L226 Difference]: Without dead ends: 118 [2020-08-22 22:10:46,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 22:10:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-08-22 22:10:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-08-22 22:10:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-08-22 22:10:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-08-22 22:10:46,253 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 168 [2020-08-22 22:10:46,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:46,253 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-08-22 22:10:46,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 22:10:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-08-22 22:10:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 22:10:46,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:46,256 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:46,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 22:10:46,256 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:46,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1108876879, now seen corresponding path program 20 times [2020-08-22 22:10:46,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:46,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034104653] [2020-08-22 22:10:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:10:46,278 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:10:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:10:46,302 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:10:46,342 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:10:46,342 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:10:46,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 22:10:46,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:10:46 BoogieIcfgContainer [2020-08-22 22:10:46,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:10:46,447 INFO L168 Benchmark]: Toolchain (without parser) took 15827.18 ms. Allocated memory was 140.5 MB in the beginning and 540.5 MB in the end (delta: 400.0 MB). Free memory was 100.0 MB in the beginning and 334.1 MB in the end (delta: -234.0 MB). Peak memory consumption was 166.0 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:46,448 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:10:46,449 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.63 ms. Allocated memory is still 140.5 MB. Free memory was 99.8 MB in the beginning and 90.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:46,449 INFO L168 Benchmark]: Boogie Preprocessor took 34.08 ms. Allocated memory is still 140.5 MB. Free memory was 90.5 MB in the beginning and 89.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:46,450 INFO L168 Benchmark]: RCFGBuilder took 397.89 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 89.2 MB in the beginning and 169.9 MB in the end (delta: -80.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:46,451 INFO L168 Benchmark]: TraceAbstraction took 15012.30 ms. Allocated memory was 202.4 MB in the beginning and 540.5 MB in the end (delta: 338.2 MB). Free memory was 169.9 MB in the beginning and 334.1 MB in the end (delta: -164.1 MB). Peak memory consumption was 174.0 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:46,453 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 374.63 ms. Allocated memory is still 140.5 MB. Free memory was 99.8 MB in the beginning and 90.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.08 ms. Allocated memory is still 140.5 MB. Free memory was 90.5 MB in the beginning and 89.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 397.89 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 89.2 MB in the beginning and 169.9 MB in the end (delta: -80.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15012.30 ms. Allocated memory was 202.4 MB in the beginning and 540.5 MB in the end (delta: 338.2 MB). Free memory was 169.9 MB in the beginning and 334.1 MB in the end (delta: -164.1 MB). Peak memory consumption was 174.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; VAL [input=20] [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 VAL [\old(x)=0, x=0] [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; VAL [\old(x)=1, \result=1, id(x-1)=0, x=1] [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; VAL [\old(x)=2, \result=2, id(x-1)=1, x=2] [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; VAL [\old(x)=3, \result=3, id(x-1)=2, x=3] [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; VAL [\old(x)=4, \result=4, id(x-1)=3, x=4] [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; VAL [\old(x)=5, \result=5, id(x-1)=4, x=5] [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; VAL [\old(x)=6, \result=6, id(x-1)=5, x=6] [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; VAL [\old(x)=7, \result=7, id(x-1)=6, x=7] [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; VAL [\old(x)=8, \result=8, id(x-1)=7, x=8] [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; VAL [\old(x)=9, \result=9, id(x-1)=8, x=9] [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; VAL [\old(x)=10, \result=10, id(x-1)=9, x=10] [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; VAL [\old(x)=11, \result=11, id(x-1)=10, x=11] [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; VAL [\old(x)=12, \result=12, id(x-1)=11, x=12] [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; VAL [\old(x)=13, \result=13, id(x-1)=12, x=13] [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; VAL [\old(x)=14, \result=14, id(x-1)=13, x=14] [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; VAL [\old(x)=15, \result=15, id(x-1)=14, x=15] [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; VAL [\old(x)=16, \result=16, id(x-1)=15, x=16] [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; VAL [\old(x)=17, \result=17, id(x-1)=16, x=17] [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; VAL [\old(x)=18, \result=18, id(x-1)=17, x=18] [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; VAL [\old(x)=19, \result=19, id(x-1)=18, x=19] [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; VAL [\old(x)=20, \result=20, id(x-1)=19, x=20] [L11] RET, EXPR id(input) VAL [id(input)=20, input=20] [L11] int result = id(input); VAL [id(input)=20, input=20, result=20] [L12] COND TRUE result == 20 VAL [input=20, result=20] [L13] __VERIFIER_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.8s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 364 SDtfs, 1058 SDslu, 1800 SDs, 0 SdLazy, 695 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 940 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 2016 NumberOfCodeBlocks, 2016 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1820 ConstructedInterpolants, 0 QuantifiedInterpolants, 542920 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 1 PerfectInterpolantSequences, 3800/9880 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 incorrect! Received shutdown request...