/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:19:25,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:19:25,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:19:25,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:19:25,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:19:25,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:19:25,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:19:25,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:19:25,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:19:25,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:19:25,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:19:25,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:19:25,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:19:25,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:19:25,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:19:25,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:19:25,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:19:25,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:19:25,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:19:25,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:19:25,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:19:25,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:19:25,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:19:25,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:19:25,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:19:25,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:19:25,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:19:25,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:19:25,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:19:25,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:19:25,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:19:25,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:19:25,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:19:25,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:19:25,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:19:25,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:19:25,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:19:25,792 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:19:25,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:19:25,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:19:25,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:19:25,795 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:19:25,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:19:25,796 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:19:25,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:19:25,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:19:25,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:19:25,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:19:25,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:19:25,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:19:25,798 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:19:25,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:19:25,798 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:19:25,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:19:25,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:19:25,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:19:25,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:19:25,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:19:25,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:19:25,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:19:25,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:19:25,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:19:25,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:19:25,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:19:25,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:19:25,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:19:25,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:19:26,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:19:26,390 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:19:26,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:19:26,398 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:19:26,399 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:19:26,401 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-09-04 13:19:26,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5eef45b97/25fdde60b4c64d3b8d9ae759a735eae8/FLAG570d6c96d [2020-09-04 13:19:27,171 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:19:27,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-09-04 13:19:27,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5eef45b97/25fdde60b4c64d3b8d9ae759a735eae8/FLAG570d6c96d [2020-09-04 13:19:27,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5eef45b97/25fdde60b4c64d3b8d9ae759a735eae8 [2020-09-04 13:19:27,519 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:19:27,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:19:27,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:19:27,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:19:27,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:19:27,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:19:27" (1/1) ... [2020-09-04 13:19:27,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155d8a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27, skipping insertion in model container [2020-09-04 13:19:27,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:19:27" (1/1) ... [2020-09-04 13:19:27,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:19:27,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:19:27,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:19:27,921 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:19:27,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:19:27,985 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:19:27,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27 WrapperNode [2020-09-04 13:19:27,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:19:27,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:19:27,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:19:27,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:19:28,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ... [2020-09-04 13:19:28,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ... [2020-09-04 13:19:28,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ... [2020-09-04 13:19:28,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ... [2020-09-04 13:19:28,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ... [2020-09-04 13:19:28,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ... [2020-09-04 13:19:28,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ... [2020-09-04 13:19:28,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:19:28,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:19:28,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:19:28,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:19:28,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:19:28,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:19:28,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:19:28,308 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-04 13:19:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-04 13:19:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:19:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:19:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:19:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-04 13:19:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-04 13:19:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:19:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:19:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:19:28,585 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:19:28,585 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:19:28,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:19:28 BoogieIcfgContainer [2020-09-04 13:19:28,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:19:28,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:19:28,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:19:28,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:19:28,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:19:27" (1/3) ... [2020-09-04 13:19:28,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544c608e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:19:28, skipping insertion in model container [2020-09-04 13:19:28,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (2/3) ... [2020-09-04 13:19:28,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544c608e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:19:28, skipping insertion in model container [2020-09-04 13:19:28,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:19:28" (3/3) ... [2020-09-04 13:19:28,609 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-09-04 13:19:28,626 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:19:28,644 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:19:28,675 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:19:28,744 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:19:28,745 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:19:28,745 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:19:28,745 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:19:28,746 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:19:28,746 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:19:28,746 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:19:28,746 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:19:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-04 13:19:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:19:28,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:28,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:28,794 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:28,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-09-04 13:19:28,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:28,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617520064] [2020-09-04 13:19:28,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:19:29,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617520064] [2020-09-04 13:19:29,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:19:29,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:19:29,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240201650] [2020-09-04 13:19:29,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:19:29,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:19:29,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:19:29,212 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-09-04 13:19:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:29,363 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-09-04 13:19:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:19:29,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:19:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:29,383 INFO L225 Difference]: With dead ends: 44 [2020-09-04 13:19:29,384 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:19:29,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:19:29,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:19:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:19:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:19:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-04 13:19:29,462 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-09-04 13:19:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:29,463 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-04 13:19:29,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:19:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-04 13:19:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:19:29,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:29,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:29,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:19:29,468 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-09-04 13:19:29,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:29,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49082943] [2020-09-04 13:19:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:19:29,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49082943] [2020-09-04 13:19:29,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:19:29,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:19:29,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092237698] [2020-09-04 13:19:29,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:19:29,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:29,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:19:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:19:29,574 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-09-04 13:19:29,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:29,670 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-09-04 13:19:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:19:29,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-04 13:19:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:29,674 INFO L225 Difference]: With dead ends: 36 [2020-09-04 13:19:29,674 INFO L226 Difference]: Without dead ends: 32 [2020-09-04 13:19:29,676 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 [2020-09-04 13:19:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-04 13:19:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-04 13:19:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:19:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-04 13:19:29,690 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-09-04 13:19:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:29,690 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-04 13:19:29,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:19:29,691 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-04 13:19:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:19:29,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:29,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:29,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:19:29,694 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:29,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:29,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-09-04 13:19:29,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:29,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332423124] [2020-09-04 13:19:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:19:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:29,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332423124] [2020-09-04 13:19:29,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258380771] [2020-09-04 13:19:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:29,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:19:29,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:30,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:30,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-09-04 13:19:30,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531487175] [2020-09-04 13:19:30,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:19:30,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:30,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:19:30,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:19:30,130 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-09-04 13:19:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:30,446 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-09-04 13:19:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:19:30,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-09-04 13:19:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:30,450 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:19:30,450 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 13:19:30,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:19:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 13:19:30,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-04 13:19:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 13:19:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-09-04 13:19:30,463 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-09-04 13:19:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:30,463 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-09-04 13:19:30,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:19:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-09-04 13:19:30,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 13:19:30,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:30,466 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] [2020-09-04 13:19:30,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:19:30,681 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-09-04 13:19:30,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:30,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967855575] [2020-09-04 13:19:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:30,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:30,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:30,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:30,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:30,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967855575] [2020-09-04 13:19:30,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100937108] [2020-09-04 13:19:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:19:30,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:19:30,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:30,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-09-04 13:19:30,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092347708] [2020-09-04 13:19:30,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:19:30,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:30,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:19:30,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:19:30,960 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-09-04 13:19:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:31,198 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-09-04 13:19:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:19:31,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-04 13:19:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:31,204 INFO L225 Difference]: With dead ends: 54 [2020-09-04 13:19:31,204 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 13:19:31,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:19:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 13:19:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-09-04 13:19:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:19:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-09-04 13:19:31,223 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-09-04 13:19:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:31,223 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-09-04 13:19:31,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:19:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-09-04 13:19:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-04 13:19:31,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:31,226 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] [2020-09-04 13:19:31,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:31,443 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-09-04 13:19:31,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:31,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322937712] [2020-09-04 13:19:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:31,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:31,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:31,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:31,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:31,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:19:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:31,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-04 13:19:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:19:31,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322937712] [2020-09-04 13:19:31,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735503322] [2020-09-04 13:19:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 13:19:31,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:31,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-09-04 13:19:31,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705876549] [2020-09-04 13:19:31,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:19:31,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:31,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:19:31,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:19:31,871 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-09-04 13:19:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:32,280 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-09-04 13:19:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:19:32,281 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-09-04 13:19:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:32,285 INFO L225 Difference]: With dead ends: 108 [2020-09-04 13:19:32,285 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 13:19:32,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:19:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 13:19:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-04 13:19:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 13:19:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-09-04 13:19:32,309 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-09-04 13:19:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:32,309 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-09-04 13:19:32,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:19:32,310 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-09-04 13:19:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 13:19:32,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:32,313 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] [2020-09-04 13:19:32,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:32,527 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:32,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-09-04 13:19:32,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:32,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802108556] [2020-09-04 13:19:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:32,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:32,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:32,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:32,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:32,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:32,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 13:19:32,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802108556] [2020-09-04 13:19:32,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303614125] [2020-09-04 13:19:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-04 13:19:32,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:32,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-09-04 13:19:32,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952648779] [2020-09-04 13:19:32,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:19:32,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:32,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:19:32,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:19:32,982 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states. [2020-09-04 13:19:33,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:33,510 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-09-04 13:19:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:19:33,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-09-04 13:19:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:33,522 INFO L225 Difference]: With dead ends: 180 [2020-09-04 13:19:33,523 INFO L226 Difference]: Without dead ends: 120 [2020-09-04 13:19:33,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:19:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-04 13:19:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-09-04 13:19:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-04 13:19:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-09-04 13:19:33,591 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-09-04 13:19:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:33,595 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-09-04 13:19:33,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:19:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-09-04 13:19:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 13:19:33,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:33,604 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-09-04 13:19:33,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:33,810 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:33,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:33,811 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-09-04 13:19:33,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:33,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771535870] [2020-09-04 13:19:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:33,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:33,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:33,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:33,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:33,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:33,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:34,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:34,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 13:19:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-04 13:19:34,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771535870] [2020-09-04 13:19:34,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714224541] [2020-09-04 13:19:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:34,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:19:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-04 13:19:34,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:34,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-09-04 13:19:34,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273319753] [2020-09-04 13:19:34,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:19:34,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:34,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:19:34,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:19:34,244 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states. [2020-09-04 13:19:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:34,987 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-09-04 13:19:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 13:19:34,991 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-09-04 13:19:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:34,996 INFO L225 Difference]: With dead ends: 258 [2020-09-04 13:19:34,997 INFO L226 Difference]: Without dead ends: 158 [2020-09-04 13:19:35,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:19:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-04 13:19:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-09-04 13:19:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-04 13:19:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-09-04 13:19:35,031 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-09-04 13:19:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:35,032 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-09-04 13:19:35,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:19:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-09-04 13:19:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-04 13:19:35,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:35,036 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:35,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-09-04 13:19:35,250 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:35,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times [2020-09-04 13:19:35,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:35,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252441473] [2020-09-04 13:19:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-04 13:19:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-09-04 13:19:35,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252441473] [2020-09-04 13:19:35,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603154153] [2020-09-04 13:19:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:35,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:35,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-04 13:19:35,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:35,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-09-04 13:19:35,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831094225] [2020-09-04 13:19:35,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:19:35,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:35,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:19:35,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:19:35,816 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 14 states. [2020-09-04 13:19:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:36,480 INFO L93 Difference]: Finished difference Result 244 states and 474 transitions. [2020-09-04 13:19:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:19:36,481 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-09-04 13:19:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:36,487 INFO L225 Difference]: With dead ends: 244 [2020-09-04 13:19:36,487 INFO L226 Difference]: Without dead ends: 123 [2020-09-04 13:19:36,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:19:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-04 13:19:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2020-09-04 13:19:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-04 13:19:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 154 transitions. [2020-09-04 13:19:36,548 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 154 transitions. Word has length 82 [2020-09-04 13:19:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:36,548 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 154 transitions. [2020-09-04 13:19:36,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:19:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 154 transitions. [2020-09-04 13:19:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 13:19:36,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:36,556 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:36,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:36,772 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:36,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 1 times [2020-09-04 13:19:36,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:36,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083405212] [2020-09-04 13:19:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:36,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:36,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:36,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:36,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 13:19:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-09-04 13:19:37,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083405212] [2020-09-04 13:19:37,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714568009] [2020-09-04 13:19:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:37,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:19:37,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 51 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-09-04 13:19:37,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:37,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2020-09-04 13:19:37,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358492774] [2020-09-04 13:19:37,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 13:19:37,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:37,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 13:19:37,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:19:37,722 INFO L87 Difference]: Start difference. First operand 101 states and 154 transitions. Second operand 18 states. [2020-09-04 13:19:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:38,778 INFO L93 Difference]: Finished difference Result 238 states and 428 transitions. [2020-09-04 13:19:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 13:19:38,779 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 136 [2020-09-04 13:19:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:38,785 INFO L225 Difference]: With dead ends: 238 [2020-09-04 13:19:38,786 INFO L226 Difference]: Without dead ends: 135 [2020-09-04 13:19:38,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 13:19:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-04 13:19:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2020-09-04 13:19:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-04 13:19:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions. [2020-09-04 13:19:38,828 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 136 [2020-09-04 13:19:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:38,829 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 160 transitions. [2020-09-04 13:19:38,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 13:19:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions. [2020-09-04 13:19:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-04 13:19:38,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:38,834 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:39,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:39,052 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 2 times [2020-09-04 13:19:39,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:39,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307563893] [2020-09-04 13:19:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:19:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:19:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:19:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:19:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-04 13:19:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:19:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:19:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:19:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 59 proven. 50 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-09-04 13:19:39,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307563893] [2020-09-04 13:19:39,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996812869] [2020-09-04 13:19:39,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:19:39,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:19:39,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:19:39,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:19:39,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:19:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-09-04 13:19:39,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:19:39,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2020-09-04 13:19:39,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909459686] [2020-09-04 13:19:39,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:19:39,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:19:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:19:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:19:39,657 INFO L87 Difference]: Start difference. First operand 112 states and 160 transitions. Second operand 15 states. [2020-09-04 13:19:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:19:40,250 INFO L93 Difference]: Finished difference Result 228 states and 340 transitions. [2020-09-04 13:19:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:19:40,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2020-09-04 13:19:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:19:40,256 INFO L225 Difference]: With dead ends: 228 [2020-09-04 13:19:40,256 INFO L226 Difference]: Without dead ends: 129 [2020-09-04 13:19:40,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-04 13:19:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-04 13:19:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-09-04 13:19:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-04 13:19:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions. [2020-09-04 13:19:40,276 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 95 [2020-09-04 13:19:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:19:40,278 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 163 transitions. [2020-09-04 13:19:40,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:19:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions. [2020-09-04 13:19:40,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 13:19:40,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:19:40,281 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:19:40,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-04 13:19:40,495 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:19:40,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:19:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-09-04 13:19:40,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:19:40,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718333154] [2020-09-04 13:19:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:19:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:19:40,540 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:19:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:19:40,589 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:19:40,654 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:19:40,655 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:19:40,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 13:19:40,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:19:40 BoogieIcfgContainer [2020-09-04 13:19:40,798 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:19:40,805 INFO L168 Benchmark]: Toolchain (without parser) took 13279.79 ms. Allocated memory was 136.8 MB in the beginning and 332.9 MB in the end (delta: 196.1 MB). Free memory was 100.6 MB in the beginning and 303.5 MB in the end (delta: -202.8 MB). Peak memory consumption was 209.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:40,806 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 136.8 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-04 13:19:40,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 464.89 ms. Allocated memory is still 136.8 MB. Free memory was 100.4 MB in the beginning and 90.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:40,808 INFO L168 Benchmark]: Boogie Preprocessor took 215.66 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.9 MB in the beginning and 179.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:40,817 INFO L168 Benchmark]: RCFGBuilder took 387.36 ms. Allocated memory is still 200.8 MB. Free memory was 179.1 MB in the beginning and 165.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:40,822 INFO L168 Benchmark]: TraceAbstraction took 12202.62 ms. Allocated memory was 200.8 MB in the beginning and 332.9 MB in the end (delta: 132.1 MB). Free memory was 165.6 MB in the beginning and 303.5 MB in the end (delta: -137.8 MB). Peak memory consumption was 210.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:19:40,832 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 136.8 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 464.89 ms. Allocated memory is still 136.8 MB. Free memory was 100.4 MB in the beginning and 90.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 215.66 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.9 MB in the beginning and 179.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 387.36 ms. Allocated memory is still 200.8 MB. Free memory was 179.1 MB in the beginning and 165.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12202.62 ms. Allocated memory was 200.8 MB in the beginning and 332.9 MB in the end (delta: 132.1 MB). Free memory was 165.6 MB in the beginning and 303.5 MB in the end (delta: -137.8 MB). Peak memory consumption was 210.6 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 = 5; VAL [x=5] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) 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 [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 [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); [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 [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); [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 [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 [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); [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); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) 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 [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 [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); [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 [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); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L37] int result = fibo1(x); [L38] COND TRUE result == 5 VAL [result=5, x=5] [L39] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.9s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 301 SDtfs, 433 SDslu, 1735 SDs, 0 SdLazy, 2418 SolverSat, 421 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 123 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 1134 NumberOfCodeBlocks, 1134 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1007 ConstructedInterpolants, 0 QuantifiedInterpolants, 138229 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1125 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 1301/1700 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...