/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/fibo_2calls_6-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:19:38,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:19:38,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:19:38,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:19:38,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:19:38,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:19:38,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:19:38,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:19:38,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:19:38,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:19:38,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:19:38,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:19:38,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:19:38,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:19:38,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:19:38,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:19:38,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:19:38,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:19:38,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:19:38,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:19:38,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:19:38,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:19:38,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:19:38,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:19:38,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:19:38,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:19:38,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:19:38,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:19:38,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:19:38,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:19:38,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:19:38,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:19:38,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:19:38,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:19:38,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:19:38,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:19:38,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:19:38,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:19:38,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:19:38,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:19:38,778 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:19:38,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:19:38,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:19:38,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:19:38,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:19:38,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:19:38,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:19:38,780 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:19:38,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:19:38,780 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:19:38,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:19:38,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:19:38,781 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:19:38,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:19:38,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:19:38,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:19:38,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:19:38,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:19:38,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:19:38,786 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 [2020-07-17 17:19:39,082 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:19:39,097 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:19:39,101 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:19:39,103 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:19:39,103 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:19:39,104 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-07-17 17:19:39,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/382180bd4/9a2cf344952b4e63b5bb2427303e25c4/FLAG6d314568a [2020-07-17 17:19:39,655 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:19:39,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c [2020-07-17 17:19:39,665 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/382180bd4/9a2cf344952b4e63b5bb2427303e25c4/FLAG6d314568a [2020-07-17 17:19:40,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/382180bd4/9a2cf344952b4e63b5bb2427303e25c4 [2020-07-17 17:19:40,016 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:19:40,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:19:40,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:19:40,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:19:40,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:19:40,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:19:40" (1/1) ... [2020-07-17 17:19:40,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11172314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40, skipping insertion in model container [2020-07-17 17:19:40,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:19:40" (1/1) ... [2020-07-17 17:19:40,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:19:40,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:19:40,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:19:40,252 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:19:40,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:19:40,288 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:19:40,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40 WrapperNode [2020-07-17 17:19:40,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:19:40,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:19:40,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:19:40,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:19:40,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40" (1/1) ... [2020-07-17 17:19:40,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40" (1/1) ... [2020-07-17 17:19:40,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40" (1/1) ... [2020-07-17 17:19:40,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40" (1/1) ... [2020-07-17 17:19:40,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40" (1/1) ... [2020-07-17 17:19:40,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40" (1/1) ... [2020-07-17 17:19:40,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40" (1/1) ... [2020-07-17 17:19:40,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:19:40,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:19:40,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:19:40,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:19:40,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40" (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 [2020-07-17 17:19:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:19:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:19:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-17 17:19:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-17 17:19:40,483 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:19:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:19:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:19:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-17 17:19:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-17 17:19:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:19:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:19:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:19:40,720 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:19:40,721 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:19:40,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:19:40 BoogieIcfgContainer [2020-07-17 17:19:40,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:19:40,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:19:40,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:19:40,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:19:40,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:19:40" (1/3) ... [2020-07-17 17:19:40,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42329c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:19:40, skipping insertion in model container [2020-07-17 17:19:40,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:40" (2/3) ... [2020-07-17 17:19:40,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42329c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:19:40, skipping insertion in model container [2020-07-17 17:19:40,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:19:40" (3/3) ... [2020-07-17 17:19:40,736 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-07-17 17:19:40,749 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:19:40,758 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:19:40,776 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:19:40,802 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:19:40,802 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:19:40,803 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:19:40,803 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:19:40,803 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:19:40,804 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:19:40,804 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:19:40,804 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:19:40,830 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-17 17:19:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 17:19:40,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:40,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:40,850 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:40,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-07-17 17:19:40,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:40,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609493670] [2020-07-17 17:19:40,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:19:41,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609493670] [2020-07-17 17:19:41,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:19:41,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:19:41,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285473355] [2020-07-17 17:19:41,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:19:41,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:41,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:19:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:19:41,148 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-07-17 17:19:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:41,275 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-07-17 17:19:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:19:41,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-17 17:19:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:41,291 INFO L225 Difference]: With dead ends: 58 [2020-07-17 17:19:41,291 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 17:19:41,296 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 [2020-07-17 17:19:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 17:19:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-17 17:19:41,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 17:19:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-17 17:19:41,362 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-07-17 17:19:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:41,363 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-17 17:19:41,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:19:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-17 17:19:41,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 17:19:41,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:41,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:41,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:19:41,368 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-07-17 17:19:41,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:41,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103004988] [2020-07-17 17:19:41,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:19:41,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103004988] [2020-07-17 17:19:41,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:19:41,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:19:41,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997788082] [2020-07-17 17:19:41,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:19:41,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:41,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:19:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:19:41,513 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-07-17 17:19:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:41,635 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-17 17:19:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:19:41,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-17 17:19:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:41,638 INFO L225 Difference]: With dead ends: 50 [2020-07-17 17:19:41,639 INFO L226 Difference]: Without dead ends: 44 [2020-07-17 17:19:41,640 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 [2020-07-17 17:19:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-17 17:19:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-17 17:19:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 17:19:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-17 17:19:41,655 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-07-17 17:19:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:41,656 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-17 17:19:41,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:19:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-17 17:19:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 17:19:41,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:41,658 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:41,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:19:41,659 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:41,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-07-17 17:19:41,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:41,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552242392] [2020-07-17 17:19:41,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:19:41,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552242392] [2020-07-17 17:19:41,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:41,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:19:41,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746076877] [2020-07-17 17:19:41,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:19:41,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:41,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:19:41,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:19:41,789 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-07-17 17:19:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:41,892 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-07-17 17:19:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:19:41,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-07-17 17:19:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:41,895 INFO L225 Difference]: With dead ends: 82 [2020-07-17 17:19:41,895 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 17:19:41,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:19:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 17:19:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-17 17:19:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-17 17:19:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-07-17 17:19:41,913 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-07-17 17:19:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:41,913 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-07-17 17:19:41,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:19:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-07-17 17:19:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 17:19:41,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:41,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:41,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:19:41,917 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:41,918 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-07-17 17:19:41,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:41,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253659688] [2020-07-17 17:19:41,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:19:42,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253659688] [2020-07-17 17:19:42,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:42,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:19:42,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458060448] [2020-07-17 17:19:42,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:19:42,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:42,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:19:42,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:19:42,045 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-07-17 17:19:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:42,295 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-07-17 17:19:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 17:19:42,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-07-17 17:19:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:42,299 INFO L225 Difference]: With dead ends: 74 [2020-07-17 17:19:42,299 INFO L226 Difference]: Without dead ends: 68 [2020-07-17 17:19:42,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:19:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-17 17:19:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-07-17 17:19:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-17 17:19:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-07-17 17:19:42,324 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 34 [2020-07-17 17:19:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:42,324 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-07-17 17:19:42,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:19:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-07-17 17:19:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-17 17:19:42,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:42,327 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:42,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:19:42,328 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:42,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1875452576, now seen corresponding path program 1 times [2020-07-17 17:19:42,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:42,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993508296] [2020-07-17 17:19:42,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 17:19:42,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993508296] [2020-07-17 17:19:42,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:42,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:19:42,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806938793] [2020-07-17 17:19:42,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:19:42,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:42,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:19:42,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:19:42,437 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 6 states. [2020-07-17 17:19:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:42,525 INFO L93 Difference]: Finished difference Result 130 states and 178 transitions. [2020-07-17 17:19:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:19:42,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-07-17 17:19:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:42,528 INFO L225 Difference]: With dead ends: 130 [2020-07-17 17:19:42,528 INFO L226 Difference]: Without dead ends: 70 [2020-07-17 17:19:42,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:19:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-17 17:19:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-17 17:19:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-17 17:19:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-07-17 17:19:42,546 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 50 [2020-07-17 17:19:42,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:42,547 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-07-17 17:19:42,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:19:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-07-17 17:19:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 17:19:42,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:42,550 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:42,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:19:42,551 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:42,551 INFO L82 PathProgramCache]: Analyzing trace with hash 104828256, now seen corresponding path program 1 times [2020-07-17 17:19:42,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:42,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265309641] [2020-07-17 17:19:42,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-17 17:19:42,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265309641] [2020-07-17 17:19:42,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:42,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:19:42,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441494481] [2020-07-17 17:19:42,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:19:42,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:42,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:19:42,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:19:42,687 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 8 states. [2020-07-17 17:19:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:42,808 INFO L93 Difference]: Finished difference Result 142 states and 197 transitions. [2020-07-17 17:19:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:19:42,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-17 17:19:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:42,811 INFO L225 Difference]: With dead ends: 142 [2020-07-17 17:19:42,811 INFO L226 Difference]: Without dead ends: 78 [2020-07-17 17:19:42,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:19:42,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-17 17:19:42,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-07-17 17:19:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-17 17:19:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-07-17 17:19:42,830 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 51 [2020-07-17 17:19:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:42,831 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-07-17 17:19:42,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:19:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-07-17 17:19:42,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-17 17:19:42,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:42,835 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:42,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:19:42,835 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:42,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1703786405, now seen corresponding path program 1 times [2020-07-17 17:19:42,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:42,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140129952] [2020-07-17 17:19:42,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 17:19:42,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140129952] [2020-07-17 17:19:42,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:42,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:19:42,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362030902] [2020-07-17 17:19:42,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:19:42,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:42,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:19:42,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:19:42,980 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 8 states. [2020-07-17 17:19:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:43,249 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2020-07-17 17:19:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:19:43,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-07-17 17:19:43,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:43,257 INFO L225 Difference]: With dead ends: 118 [2020-07-17 17:19:43,257 INFO L226 Difference]: Without dead ends: 112 [2020-07-17 17:19:43,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:19:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-17 17:19:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-07-17 17:19:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-17 17:19:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2020-07-17 17:19:43,311 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 52 [2020-07-17 17:19:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:43,313 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2020-07-17 17:19:43,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:19:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2020-07-17 17:19:43,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-17 17:19:43,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:43,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:43,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:19:43,322 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash -521446491, now seen corresponding path program 1 times [2020-07-17 17:19:43,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:43,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382948574] [2020-07-17 17:19:43,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 17:19:43,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382948574] [2020-07-17 17:19:43,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:43,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:19:43,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109393389] [2020-07-17 17:19:43,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:19:43,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:43,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:19:43,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:19:43,544 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand 8 states. [2020-07-17 17:19:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:43,687 INFO L93 Difference]: Finished difference Result 227 states and 348 transitions. [2020-07-17 17:19:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 17:19:43,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-17 17:19:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:43,691 INFO L225 Difference]: With dead ends: 227 [2020-07-17 17:19:43,691 INFO L226 Difference]: Without dead ends: 127 [2020-07-17 17:19:43,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:19:43,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-17 17:19:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2020-07-17 17:19:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-17 17:19:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2020-07-17 17:19:43,740 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 69 [2020-07-17 17:19:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:43,742 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2020-07-17 17:19:43,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:19:43,742 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2020-07-17 17:19:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-17 17:19:43,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:43,745 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:43,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:19:43,745 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:43,746 INFO L82 PathProgramCache]: Analyzing trace with hash -439633211, now seen corresponding path program 1 times [2020-07-17 17:19:43,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:43,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111360802] [2020-07-17 17:19:43,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-17 17:19:43,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111360802] [2020-07-17 17:19:43,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:43,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:19:43,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434281865] [2020-07-17 17:19:43,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:19:43,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:43,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:19:43,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:19:43,924 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand 10 states. [2020-07-17 17:19:44,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:44,170 INFO L93 Difference]: Finished difference Result 257 states and 400 transitions. [2020-07-17 17:19:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:19:44,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-07-17 17:19:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:44,173 INFO L225 Difference]: With dead ends: 257 [2020-07-17 17:19:44,173 INFO L226 Difference]: Without dead ends: 151 [2020-07-17 17:19:44,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:19:44,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-17 17:19:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2020-07-17 17:19:44,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-17 17:19:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 191 transitions. [2020-07-17 17:19:44,197 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 191 transitions. Word has length 70 [2020-07-17 17:19:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:44,198 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 191 transitions. [2020-07-17 17:19:44,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:19:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 191 transitions. [2020-07-17 17:19:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-17 17:19:44,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:44,201 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:44,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:19:44,201 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash 307755032, now seen corresponding path program 2 times [2020-07-17 17:19:44,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:44,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695238989] [2020-07-17 17:19:44,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-17 17:19:44,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695238989] [2020-07-17 17:19:44,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:44,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:19:44,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256871900] [2020-07-17 17:19:44,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:19:44,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:44,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:19:44,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:19:44,430 INFO L87 Difference]: Start difference. First operand 133 states and 191 transitions. Second operand 12 states. [2020-07-17 17:19:44,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:44,862 INFO L93 Difference]: Finished difference Result 265 states and 420 transitions. [2020-07-17 17:19:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 17:19:44,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 105 [2020-07-17 17:19:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:44,866 INFO L225 Difference]: With dead ends: 265 [2020-07-17 17:19:44,867 INFO L226 Difference]: Without dead ends: 116 [2020-07-17 17:19:44,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-17 17:19:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-17 17:19:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-07-17 17:19:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-17 17:19:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-07-17 17:19:44,884 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 105 [2020-07-17 17:19:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:44,885 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-07-17 17:19:44,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:19:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-07-17 17:19:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-17 17:19:44,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:44,887 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:44,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:19:44,887 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:44,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1534580400, now seen corresponding path program 1 times [2020-07-17 17:19:44,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:44,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591488103] [2020-07-17 17:19:44,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 50 proven. 67 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-07-17 17:19:45,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591488103] [2020-07-17 17:19:45,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:45,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:19:45,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286230522] [2020-07-17 17:19:45,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:19:45,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:45,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:19:45,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:19:45,129 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 10 states. [2020-07-17 17:19:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:45,374 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2020-07-17 17:19:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:19:45,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-07-17 17:19:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:45,378 INFO L225 Difference]: With dead ends: 193 [2020-07-17 17:19:45,378 INFO L226 Difference]: Without dead ends: 105 [2020-07-17 17:19:45,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:19:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-17 17:19:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-07-17 17:19:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-17 17:19:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-07-17 17:19:45,393 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 123 [2020-07-17 17:19:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:45,394 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-07-17 17:19:45,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:19:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-07-17 17:19:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-17 17:19:45,396 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:45,396 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:45,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:19:45,397 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:45,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:45,397 INFO L82 PathProgramCache]: Analyzing trace with hash 822116120, now seen corresponding path program 2 times [2020-07-17 17:19:45,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:45,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499853991] [2020-07-17 17:19:45,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 72 proven. 111 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-07-17 17:19:45,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499853991] [2020-07-17 17:19:45,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:45,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:19:45,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664617304] [2020-07-17 17:19:45,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:19:45,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:45,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:19:45,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:19:45,660 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 12 states. [2020-07-17 17:19:46,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:46,066 INFO L93 Difference]: Finished difference Result 241 states and 326 transitions. [2020-07-17 17:19:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 17:19:46,066 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 140 [2020-07-17 17:19:46,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:46,069 INFO L225 Difference]: With dead ends: 241 [2020-07-17 17:19:46,069 INFO L226 Difference]: Without dead ends: 141 [2020-07-17 17:19:46,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-17 17:19:46,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-17 17:19:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2020-07-17 17:19:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-17 17:19:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2020-07-17 17:19:46,088 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 140 [2020-07-17 17:19:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:46,089 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2020-07-17 17:19:46,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:19:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2020-07-17 17:19:46,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-17 17:19:46,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:46,091 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:46,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 17:19:46,091 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:46,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1260071360, now seen corresponding path program 2 times [2020-07-17 17:19:46,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:46,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588555234] [2020-07-17 17:19:46,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 26 proven. 126 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-07-17 17:19:46,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588555234] [2020-07-17 17:19:46,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:46,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:19:46,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700021579] [2020-07-17 17:19:46,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:19:46,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:46,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:19:46,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:19:46,314 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand 10 states. [2020-07-17 17:19:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:46,590 INFO L93 Difference]: Finished difference Result 244 states and 326 transitions. [2020-07-17 17:19:46,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 17:19:46,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2020-07-17 17:19:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:46,598 INFO L225 Difference]: With dead ends: 244 [2020-07-17 17:19:46,598 INFO L226 Difference]: Without dead ends: 238 [2020-07-17 17:19:46,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-17 17:19:46,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-17 17:19:46,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 213. [2020-07-17 17:19:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-17 17:19:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 287 transitions. [2020-07-17 17:19:46,644 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 287 transitions. Word has length 140 [2020-07-17 17:19:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:46,645 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 287 transitions. [2020-07-17 17:19:46,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:19:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 287 transitions. [2020-07-17 17:19:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-07-17 17:19:46,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:46,652 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:46,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 17:19:46,653 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash -88380307, now seen corresponding path program 3 times [2020-07-17 17:19:46,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:46,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379529605] [2020-07-17 17:19:46,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 179 proven. 163 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-07-17 17:19:47,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379529605] [2020-07-17 17:19:47,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:47,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 17:19:47,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959980142] [2020-07-17 17:19:47,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 17:19:47,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 17:19:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:19:47,158 INFO L87 Difference]: Start difference. First operand 213 states and 287 transitions. Second operand 14 states. [2020-07-17 17:19:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:47,663 INFO L93 Difference]: Finished difference Result 470 states and 677 transitions. [2020-07-17 17:19:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 17:19:47,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 193 [2020-07-17 17:19:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:47,669 INFO L225 Difference]: With dead ends: 470 [2020-07-17 17:19:47,669 INFO L226 Difference]: Without dead ends: 257 [2020-07-17 17:19:47,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-07-17 17:19:47,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-17 17:19:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 233. [2020-07-17 17:19:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-17 17:19:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 310 transitions. [2020-07-17 17:19:47,709 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 310 transitions. Word has length 193 [2020-07-17 17:19:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:47,710 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 310 transitions. [2020-07-17 17:19:47,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 17:19:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 310 transitions. [2020-07-17 17:19:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-17 17:19:47,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:47,716 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:47,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 17:19:47,717 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:47,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1293350858, now seen corresponding path program 4 times [2020-07-17 17:19:47,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:47,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787875593] [2020-07-17 17:19:47,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 199 proven. 672 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2020-07-17 17:19:48,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787875593] [2020-07-17 17:19:48,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:48,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 17:19:48,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771169304] [2020-07-17 17:19:48,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 17:19:48,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:48,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 17:19:48,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:19:48,374 INFO L87 Difference]: Start difference. First operand 233 states and 310 transitions. Second operand 14 states. [2020-07-17 17:19:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:48,976 INFO L93 Difference]: Finished difference Result 534 states and 785 transitions. [2020-07-17 17:19:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 17:19:48,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 351 [2020-07-17 17:19:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:48,982 INFO L225 Difference]: With dead ends: 534 [2020-07-17 17:19:48,982 INFO L226 Difference]: Without dead ends: 301 [2020-07-17 17:19:48,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2020-07-17 17:19:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-07-17 17:19:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 265. [2020-07-17 17:19:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-07-17 17:19:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 352 transitions. [2020-07-17 17:19:49,029 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 352 transitions. Word has length 351 [2020-07-17 17:19:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:49,029 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 352 transitions. [2020-07-17 17:19:49,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 17:19:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 352 transitions. [2020-07-17 17:19:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-07-17 17:19:49,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:49,035 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:49,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 17:19:49,035 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:49,036 INFO L82 PathProgramCache]: Analyzing trace with hash -2113087688, now seen corresponding path program 5 times [2020-07-17 17:19:49,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:49,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921393219] [2020-07-17 17:19:49,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1423 backedges. 261 proven. 446 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-07-17 17:19:49,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921393219] [2020-07-17 17:19:49,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:49,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-17 17:19:49,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214958883] [2020-07-17 17:19:49,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 17:19:49,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:49,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 17:19:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:19:49,725 INFO L87 Difference]: Start difference. First operand 265 states and 352 transitions. Second operand 16 states. [2020-07-17 17:19:50,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:50,507 INFO L93 Difference]: Finished difference Result 487 states and 692 transitions. [2020-07-17 17:19:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 17:19:50,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 281 [2020-07-17 17:19:50,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:50,513 INFO L225 Difference]: With dead ends: 487 [2020-07-17 17:19:50,514 INFO L226 Difference]: Without dead ends: 190 [2020-07-17 17:19:50,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 17:19:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-17 17:19:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 163. [2020-07-17 17:19:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-17 17:19:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 209 transitions. [2020-07-17 17:19:50,549 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 209 transitions. Word has length 281 [2020-07-17 17:19:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:50,551 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 209 transitions. [2020-07-17 17:19:50,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 17:19:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 209 transitions. [2020-07-17 17:19:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-07-17 17:19:50,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:50,556 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:50,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 17:19:50,556 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1117162661, now seen corresponding path program 6 times [2020-07-17 17:19:50,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:50,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206260585] [2020-07-17 17:19:50,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:50,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:19:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:19:50,694 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:19:50,694 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:19:50,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 17:19:50,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:19:50 BoogieIcfgContainer [2020-07-17 17:19:50,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:19:50,780 INFO L168 Benchmark]: Toolchain (without parser) took 10761.30 ms. Allocated memory was 140.0 MB in the beginning and 436.7 MB in the end (delta: 296.7 MB). Free memory was 105.6 MB in the beginning and 224.0 MB in the end (delta: -118.4 MB). Peak memory consumption was 178.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:19:50,781 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 17:19:50,782 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.51 ms. Allocated memory is still 140.0 MB. Free memory was 105.2 MB in the beginning and 95.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-17 17:19:50,783 INFO L168 Benchmark]: Boogie Preprocessor took 122.83 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 95.3 MB in the beginning and 183.9 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-17 17:19:50,784 INFO L168 Benchmark]: RCFGBuilder took 313.29 ms. Allocated memory is still 205.0 MB. Free memory was 183.9 MB in the beginning and 169.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-17 17:19:50,784 INFO L168 Benchmark]: TraceAbstraction took 10049.90 ms. Allocated memory was 205.0 MB in the beginning and 436.7 MB in the end (delta: 231.7 MB). Free memory was 169.7 MB in the beginning and 224.0 MB in the end (delta: -54.3 MB). Peak memory consumption was 177.5 MB. Max. memory is 7.1 GB. [2020-07-17 17:19:50,788 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.51 ms. Allocated memory is still 140.0 MB. Free memory was 105.2 MB in the beginning and 95.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.83 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 95.3 MB in the beginning and 183.9 MB in the end (delta: -88.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.29 ms. Allocated memory is still 205.0 MB. Free memory was 183.9 MB in the beginning and 169.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10049.90 ms. Allocated memory was 205.0 MB in the beginning and 436.7 MB in the end (delta: 231.7 MB). Free memory was 169.7 MB in the beginning and 224.0 MB in the end (delta: -54.3 MB). Peak memory consumption was 177.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; VAL [x=6] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=3, \result=2, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=4, \result=3, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=3, \result=2, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=5, \result=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=3, \result=2, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=4, \result=3, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=6, \result=8, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=8, x=6] [L37] int result = fibo1(x); VAL [fibo1(x)=8, result=8, x=6] [L38] COND TRUE result == 8 VAL [result=8, x=6] [L39] __VERIFIER_error() VAL [result=8, x=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.8s, OverallIterations: 17, TraceHistogramMax: 21, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 747 SDtfs, 926 SDslu, 3923 SDs, 0 SdLazy, 3274 SolverSat, 381 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 645 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=265occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 199 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 1953 NumberOfCodeBlocks, 1953 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1709 ConstructedInterpolants, 0 QuantifiedInterpolants, 521295 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 3765/5449 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...