/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_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:59:19,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:59:19,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:59:19,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:59:19,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:59:19,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:59:19,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:59:19,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:59:19,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:59:19,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:59:19,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:59:19,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:59:19,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:59:19,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:59:19,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:59:19,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:59:19,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:59:19,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:59:19,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:59:19,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:59:19,700 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:59:19,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:59:19,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:59:19,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:59:19,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 11:59:19,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:59:19,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:59:19,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:59:19,719 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 11:59:19,757 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:59:19,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:59:19,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:59:19,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:59:19,764 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:59:19,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:59:19,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:59:19,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:59:19,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:59:19,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:59:19,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:59:19,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:59:19,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:59:19,767 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:59:19,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:59:19,767 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:59:19,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:59:19,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:59:19,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:59:19,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:59:19,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:59:19,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:59:19,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:59:19,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:59:19,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:59:19,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:59:19,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:59:19,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:59:19,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:59:19,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:59:20,034 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:59:20,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:59:20,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:59:20,049 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:59:20,049 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:59:20,050 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-17 11:59:20,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858519518/5c3ece9a99874667847c7a115c0ce63b/FLAGfec566941 [2020-07-17 11:59:20,537 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:59:20,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2020-07-17 11:59:20,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858519518/5c3ece9a99874667847c7a115c0ce63b/FLAGfec566941 [2020-07-17 11:59:20,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858519518/5c3ece9a99874667847c7a115c0ce63b [2020-07-17 11:59:20,982 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:59:20,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:59:20,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:59:20,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:59:20,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:59:20,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:59:20" (1/1) ... [2020-07-17 11:59:20,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58bb5dcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:20, skipping insertion in model container [2020-07-17 11:59:20,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:59:20" (1/1) ... [2020-07-17 11:59:21,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:59:21,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:59:21,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:59:21,180 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:59:21,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:59:21,206 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:59:21,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:21 WrapperNode [2020-07-17 11:59:21,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:59:21,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:59:21,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:59:21,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:59:21,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:21" (1/1) ... [2020-07-17 11:59:21,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:21" (1/1) ... [2020-07-17 11:59:21,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:21" (1/1) ... [2020-07-17 11:59:21,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:21" (1/1) ... [2020-07-17 11:59:21,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:21" (1/1) ... [2020-07-17 11:59:21,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:21" (1/1) ... [2020-07-17 11:59:21,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:21" (1/1) ... [2020-07-17 11:59:21,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:59:21,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:59:21,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:59:21,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:59:21,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:59:21,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:59:21,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:59:21,383 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-17 11:59:21,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:59:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:59:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:59:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-17 11:59:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:59:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:59:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:59:21,562 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:59:21,563 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 11:59:21,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:59:21 BoogieIcfgContainer [2020-07-17 11:59:21,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:59:21,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:59:21,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:59:21,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:59:21,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:59:20" (1/3) ... [2020-07-17 11:59:21,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7874c447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:59:21, skipping insertion in model container [2020-07-17 11:59:21,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:59:21" (2/3) ... [2020-07-17 11:59:21,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7874c447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:59:21, skipping insertion in model container [2020-07-17 11:59:21,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:59:21" (3/3) ... [2020-07-17 11:59:21,574 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2020-07-17 11:59:21,583 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:59:21,589 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:59:21,603 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:59:21,627 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:59:21,627 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:59:21,627 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:59:21,627 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:59:21,628 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:59:21,628 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:59:21,628 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:59:21,628 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:59:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-17 11:59:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 11:59:21,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:21,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:21,656 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:21,662 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-17 11:59:21,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:21,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407331515] [2020-07-17 11:59:21,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:59:21,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407331515] [2020-07-17 11:59:21,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:59:21,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:59:21,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150667669] [2020-07-17 11:59:21,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:59:21,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:21,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:59:21,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:59:21,897 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-17 11:59:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:21,998 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-17 11:59:21,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:59:22,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-17 11:59:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:22,011 INFO L225 Difference]: With dead ends: 35 [2020-07-17 11:59:22,012 INFO L226 Difference]: Without dead ends: 21 [2020-07-17 11:59:22,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:59:22,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-17 11:59:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-17 11:59:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 11:59:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-17 11:59:22,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-17 11:59:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:22,069 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-17 11:59:22,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:59:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-17 11:59:22,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-17 11:59:22,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:22,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:22,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:59:22,073 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:22,074 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-17 11:59:22,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:22,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035784988] [2020-07-17 11:59:22,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:59:22,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035784988] [2020-07-17 11:59:22,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:59:22,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:59:22,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195969496] [2020-07-17 11:59:22,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:59:22,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:22,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:59:22,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:59:22,221 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-17 11:59:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:22,325 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-17 11:59:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:59:22,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-17 11:59:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:22,330 INFO L225 Difference]: With dead ends: 27 [2020-07-17 11:59:22,330 INFO L226 Difference]: Without dead ends: 23 [2020-07-17 11:59:22,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:59:22,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-17 11:59:22,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-17 11:59:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 11:59:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-17 11:59:22,350 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-17 11:59:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:22,350 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-17 11:59:22,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:59:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-17 11:59:22,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 11:59:22,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:22,355 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:22,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 11:59:22,356 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:22,357 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-17 11:59:22,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:22,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693014972] [2020-07-17 11:59:22,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 11:59:22,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693014972] [2020-07-17 11:59:22,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907590014] [2020-07-17 11:59:22,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 11:59:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:22,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 11:59:22,575 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 11:59:22,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:22,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-17 11:59:22,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987438387] [2020-07-17 11:59:22,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 11:59:22,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:22,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 11:59:22,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 11:59:22,644 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-17 11:59:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:22,762 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-17 11:59:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 11:59:22,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-17 11:59:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:22,764 INFO L225 Difference]: With dead ends: 38 [2020-07-17 11:59:22,764 INFO L226 Difference]: Without dead ends: 23 [2020-07-17 11:59:22,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-17 11:59:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-17 11:59:22,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-17 11:59:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-17 11:59:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-17 11:59:22,773 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-07-17 11:59:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:22,773 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-17 11:59:22,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 11:59:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-17 11:59:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 11:59:22,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:22,776 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:22,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 11:59:22,989 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:22,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:22,990 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-17 11:59:22,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:22,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158634093] [2020-07-17 11:59:22,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-17 11:59:23,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158634093] [2020-07-17 11:59:23,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054408871] [2020-07-17 11:59:23,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 11:59:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 11:59:23,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-17 11:59:23,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:23,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-17 11:59:23,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581642984] [2020-07-17 11:59:23,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 11:59:23,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 11:59:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-17 11:59:23,184 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-07-17 11:59:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:23,271 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-07-17 11:59:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 11:59:23,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-17 11:59:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:23,274 INFO L225 Difference]: With dead ends: 41 [2020-07-17 11:59:23,275 INFO L226 Difference]: Without dead ends: 37 [2020-07-17 11:59:23,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-17 11:59:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-17 11:59:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-17 11:59:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-17 11:59:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-07-17 11:59:23,286 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-07-17 11:59:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:23,287 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-07-17 11:59:23,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 11:59:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-07-17 11:59:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-17 11:59:23,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:23,289 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:23,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:23,504 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:23,505 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-07-17 11:59:23,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:23,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801730843] [2020-07-17 11:59:23,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-17 11:59:23,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801730843] [2020-07-17 11:59:23,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464842373] [2020-07-17 11:59:23,720 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 11:59:23,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:59:23,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:23,764 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 11:59:23,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-17 11:59:23,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:23,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-07-17 11:59:23,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674667378] [2020-07-17 11:59:23,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 11:59:23,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:23,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 11:59:23,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-17 11:59:23,859 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 12 states. [2020-07-17 11:59:24,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:24,118 INFO L93 Difference]: Finished difference Result 72 states and 109 transitions. [2020-07-17 11:59:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 11:59:24,120 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-17 11:59:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:24,122 INFO L225 Difference]: With dead ends: 72 [2020-07-17 11:59:24,122 INFO L226 Difference]: Without dead ends: 41 [2020-07-17 11:59:24,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-07-17 11:59:24,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-17 11:59:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-17 11:59:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-17 11:59:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-17 11:59:24,141 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 40 [2020-07-17 11:59:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:24,141 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-17 11:59:24,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 11:59:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-17 11:59:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-17 11:59:24,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:24,148 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:24,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:24,363 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 3 times [2020-07-17 11:59:24,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:24,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768082202] [2020-07-17 11:59:24,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 11:59:24,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768082202] [2020-07-17 11:59:24,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975583643] [2020-07-17 11:59:24,599 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 11:59:24,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-07-17 11:59:24,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:24,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 11:59:24,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 65 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-17 11:59:24,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:24,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-07-17 11:59:24,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092228096] [2020-07-17 11:59:24,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 11:59:24,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:24,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 11:59:24,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-17 11:59:24,726 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 10 states. [2020-07-17 11:59:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:24,897 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2020-07-17 11:59:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 11:59:24,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-07-17 11:59:24,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:24,903 INFO L225 Difference]: With dead ends: 88 [2020-07-17 11:59:24,904 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 11:59:24,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-17 11:59:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 11:59:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-07-17 11:59:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-17 11:59:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-07-17 11:59:24,925 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 68 [2020-07-17 11:59:24,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:24,926 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-07-17 11:59:24,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 11:59:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-07-17 11:59:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-17 11:59:24,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:24,934 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:25,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:25,151 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:25,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:25,152 INFO L82 PathProgramCache]: Analyzing trace with hash -19418837, now seen corresponding path program 4 times [2020-07-17 11:59:25,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:25,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325003829] [2020-07-17 11:59:25,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 47 proven. 280 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-17 11:59:25,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325003829] [2020-07-17 11:59:25,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020838228] [2020-07-17 11:59:25,429 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 11:59:25,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:59:25,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:25,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-17 11:59:25,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 47 proven. 280 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-07-17 11:59:25,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:25,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-17 11:59:25,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342909233] [2020-07-17 11:59:25,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 11:59:25,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:25,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 11:59:25,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-17 11:59:25,529 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 10 states. [2020-07-17 11:59:25,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:25,759 INFO L93 Difference]: Finished difference Result 120 states and 179 transitions. [2020-07-17 11:59:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 11:59:25,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-07-17 11:59:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:25,767 INFO L225 Difference]: With dead ends: 120 [2020-07-17 11:59:25,768 INFO L226 Difference]: Without dead ends: 116 [2020-07-17 11:59:25,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-17 11:59:25,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-17 11:59:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2020-07-17 11:59:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-17 11:59:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 162 transitions. [2020-07-17 11:59:25,813 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 162 transitions. Word has length 123 [2020-07-17 11:59:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:25,815 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 162 transitions. [2020-07-17 11:59:25,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 11:59:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 162 transitions. [2020-07-17 11:59:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-17 11:59:25,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:25,825 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:26,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-17 11:59:26,042 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:26,043 INFO L82 PathProgramCache]: Analyzing trace with hash 706081956, now seen corresponding path program 5 times [2020-07-17 11:59:26,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:26,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435436584] [2020-07-17 11:59:26,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 432 proven. 761 refuted. 0 times theorem prover too weak. 1387 trivial. 0 not checked. [2020-07-17 11:59:26,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435436584] [2020-07-17 11:59:26,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651615199] [2020-07-17 11:59:26,679 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 11:59:26,767 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-07-17 11:59:26,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:26,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-17 11:59:26,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 630 proven. 571 refuted. 0 times theorem prover too weak. 1379 trivial. 0 not checked. [2020-07-17 11:59:26,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:26,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2020-07-17 11:59:26,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101938621] [2020-07-17 11:59:26,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 11:59:26,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:26,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 11:59:26,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-07-17 11:59:26,922 INFO L87 Difference]: Start difference. First operand 107 states and 162 transitions. Second operand 19 states. [2020-07-17 11:59:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:27,615 INFO L93 Difference]: Finished difference Result 196 states and 368 transitions. [2020-07-17 11:59:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-17 11:59:27,616 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 218 [2020-07-17 11:59:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:27,618 INFO L225 Difference]: With dead ends: 196 [2020-07-17 11:59:27,618 INFO L226 Difference]: Without dead ends: 98 [2020-07-17 11:59:27,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 11:59:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-17 11:59:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-07-17 11:59:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-17 11:59:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2020-07-17 11:59:27,634 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 218 [2020-07-17 11:59:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:27,634 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2020-07-17 11:59:27,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 11:59:27,635 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2020-07-17 11:59:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-17 11:59:27,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:27,639 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:27,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:27,854 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:27,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:27,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 6 times [2020-07-17 11:59:27,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:27,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84662071] [2020-07-17 11:59:27,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-17 11:59:29,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84662071] [2020-07-17 11:59:29,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577632392] [2020-07-17 11:59:29,376 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 11:59:29,539 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2020-07-17 11:59:29,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:29,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 167 conjunts are in the unsatisfiable core [2020-07-17 11:59:29,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2020-07-17 11:59:30,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:30,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2020-07-17 11:59:30,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66309108] [2020-07-17 11:59:30,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-17 11:59:30,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:30,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-17 11:59:30,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-17 11:59:30,475 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand 28 states. [2020-07-17 11:59:30,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:30,943 INFO L93 Difference]: Finished difference Result 108 states and 158 transitions. [2020-07-17 11:59:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 11:59:30,944 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 286 [2020-07-17 11:59:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:30,946 INFO L225 Difference]: With dead ends: 108 [2020-07-17 11:59:30,946 INFO L226 Difference]: Without dead ends: 104 [2020-07-17 11:59:30,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 407 SyntacticMatches, 21 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-07-17 11:59:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-17 11:59:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2020-07-17 11:59:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-17 11:59:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 142 transitions. [2020-07-17 11:59:30,965 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 142 transitions. Word has length 286 [2020-07-17 11:59:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:30,966 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 142 transitions. [2020-07-17 11:59:30,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-17 11:59:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 142 transitions. [2020-07-17 11:59:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-07-17 11:59:30,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:30,973 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 43, 26, 26, 26, 26, 26, 26, 26, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:31,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:31,187 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:31,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:31,188 INFO L82 PathProgramCache]: Analyzing trace with hash -120387169, now seen corresponding path program 7 times [2020-07-17 11:59:31,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:31,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423856015] [2020-07-17 11:59:31,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 1624 proven. 1706 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2020-07-17 11:59:32,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423856015] [2020-07-17 11:59:32,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19179409] [2020-07-17 11:59:32,328 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 11:59:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:32,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-17 11:59:32,442 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 1238 proven. 629 refuted. 0 times theorem prover too weak. 5848 trivial. 0 not checked. [2020-07-17 11:59:32,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:32,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 20 [2020-07-17 11:59:32,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898998674] [2020-07-17 11:59:32,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 11:59:32,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:32,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 11:59:32,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-07-17 11:59:32,601 INFO L87 Difference]: Start difference. First operand 97 states and 142 transitions. Second operand 20 states. [2020-07-17 11:59:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:33,478 INFO L93 Difference]: Finished difference Result 230 states and 452 transitions. [2020-07-17 11:59:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-17 11:59:33,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 368 [2020-07-17 11:59:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:33,482 INFO L225 Difference]: With dead ends: 230 [2020-07-17 11:59:33,482 INFO L226 Difference]: Without dead ends: 127 [2020-07-17 11:59:33,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=431, Invalid=1731, Unknown=0, NotChecked=0, Total=2162 [2020-07-17 11:59:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-17 11:59:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2020-07-17 11:59:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-17 11:59:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2020-07-17 11:59:33,498 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 368 [2020-07-17 11:59:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:33,499 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2020-07-17 11:59:33,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 11:59:33,499 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2020-07-17 11:59:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-17 11:59:33,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:59:33,505 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:59:33,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-17 11:59:33,720 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:59:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:59:33,721 INFO L82 PathProgramCache]: Analyzing trace with hash -617256294, now seen corresponding path program 8 times [2020-07-17 11:59:33,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:59:33,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120372885] [2020-07-17 11:59:33,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:59:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:59:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 863 proven. 1526 refuted. 0 times theorem prover too weak. 4731 trivial. 0 not checked. [2020-07-17 11:59:34,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120372885] [2020-07-17 11:59:34,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494222990] [2020-07-17 11:59:34,699 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:34,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:59:34,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:59:34,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-17 11:59:34,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:59:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 419 proven. 1507 refuted. 0 times theorem prover too weak. 5194 trivial. 0 not checked. [2020-07-17 11:59:34,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:59:34,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 19 [2020-07-17 11:59:34,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937715569] [2020-07-17 11:59:34,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 11:59:34,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:59:34,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 11:59:34,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-07-17 11:59:34,988 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand 19 states. [2020-07-17 11:59:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:59:35,482 INFO L93 Difference]: Finished difference Result 214 states and 297 transitions. [2020-07-17 11:59:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 11:59:35,482 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 354 [2020-07-17 11:59:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:59:35,483 INFO L225 Difference]: With dead ends: 214 [2020-07-17 11:59:35,484 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 11:59:35,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2020-07-17 11:59:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 11:59:35,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 11:59:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 11:59:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 11:59:35,486 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 354 [2020-07-17 11:59:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:59:35,486 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 11:59:35,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 11:59:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 11:59:35,487 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 11:59:35,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:59:35,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 11:59:36,339 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 42 [2020-07-17 11:59:36,473 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 6 [2020-07-17 11:59:36,478 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 11:59:36,478 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:59:36,478 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:59:36,478 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 11:59:36,478 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 11:59:36,479 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 11:59:36,479 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-07-17 11:59:36,479 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-17 11:59:36,479 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-17 11:59:36,479 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-07-17 11:59:36,479 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 7 main_~x~0) (<= main_~x~0 7)) [2020-07-17 11:59:36,480 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-07-17 11:59:36,480 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-17 11:59:36,480 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-07-17 11:59:36,480 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-07-17 11:59:36,480 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-07-17 11:59:36,480 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-07-17 11:59:36,481 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (<= 2 |fibo_#in~n|)) [2020-07-17 11:59:36,481 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-17 11:59:36,481 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (let ((.cse0 (<= 1 |fibo_#t~ret0|)) (.cse1 (<= |fibo_#t~ret0| 1))) (or (and (<= 4 |fibo_#in~n|) (<= |fibo_#t~ret0| 2) (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|)) (and .cse0 .cse1 (<= |fibo_#in~n| 2) (<= 2 |fibo_#in~n|)) (and (<= 5 |fibo_#in~n|) (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= |fibo_#in~n| 5)) (<= 8 |fibo_#in~n|) (and (<= 5 |fibo_#t~ret0|) (<= |fibo_#in~n| 6) (<= |fibo_#t~ret0| 5) (<= 6 |fibo_#in~n|)) (and (<= |fibo_#t~ret0| 8) (<= 7 |fibo_#in~n|) (<= 8 |fibo_#t~ret0|)) (and .cse0 .cse1 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3))))) [2020-07-17 11:59:36,481 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-07-17 11:59:36,481 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-07-17 11:59:36,481 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-07-17 11:59:36,482 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-17 11:59:36,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 11:59:36 BoogieIcfgContainer [2020-07-17 11:59:36,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 11:59:36,489 INFO L168 Benchmark]: Toolchain (without parser) took 15505.73 ms. Allocated memory was 146.3 MB in the beginning and 548.9 MB in the end (delta: 402.7 MB). Free memory was 104.8 MB in the beginning and 348.3 MB in the end (delta: -243.5 MB). Peak memory consumption was 159.2 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:36,489 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 11:59:36,490 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.96 ms. Allocated memory is still 146.3 MB. Free memory was 104.4 MB in the beginning and 94.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:36,491 INFO L168 Benchmark]: Boogie Preprocessor took 23.02 ms. Allocated memory is still 146.3 MB. Free memory was 94.7 MB in the beginning and 93.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:36,492 INFO L168 Benchmark]: RCFGBuilder took 335.55 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 93.3 MB in the beginning and 171.7 MB in the end (delta: -78.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:36,492 INFO L168 Benchmark]: TraceAbstraction took 14919.34 ms. Allocated memory was 203.9 MB in the beginning and 548.9 MB in the end (delta: 345.0 MB). Free memory was 171.1 MB in the beginning and 348.3 MB in the end (delta: -177.2 MB). Peak memory consumption was 167.8 MB. Max. memory is 7.1 GB. [2020-07-17 11:59:36,496 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.96 ms. Allocated memory is still 146.3 MB. Free memory was 104.4 MB in the beginning and 94.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.02 ms. Allocated memory is still 146.3 MB. Free memory was 94.7 MB in the beginning and 93.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 335.55 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 93.3 MB in the beginning and 171.7 MB in the end (delta: -78.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14919.34 ms. Allocated memory was 203.9 MB in the beginning and 548.9 MB in the end (delta: 345.0 MB). Free memory was 171.1 MB in the beginning and 348.3 MB in the end (delta: -177.2 MB). Peak memory consumption was 167.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.0s, OverallIterations: 11, TraceHistogramMax: 53, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 290 SDtfs, 587 SDslu, 1691 SDs, 0 SdLazy, 2402 SolverSat, 567 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2226 GetRequests, 1997 SyntacticMatches, 21 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred 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: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 46 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 275 PreInvPairs, 405 NumberOfFragments, 102 HoareAnnotationTreeSize, 275 FomulaSimplifications, 1036 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2240 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 3047 NumberOfCodeBlocks, 2963 NumberOfCodeBlocksAsserted, 89 NumberOfCheckSat, 3027 ConstructedInterpolants, 0 QuantifiedInterpolants, 1675733 SizeOfPredicates, 48 NumberOfNonLiveVariables, 3161 ConjunctsInSsa, 261 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 35563/45982 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...