/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/sum_20x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:13:21,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:13:21,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:13:21,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:13:21,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:13:21,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:13:21,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:13:21,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:13:21,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:13:21,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:13:21,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:13:21,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:13:21,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:13:21,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:13:21,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:13:21,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:13:21,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:13:21,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:13:21,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:13:21,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:13:21,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:13:21,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:13:21,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:13:21,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:13:21,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:13:21,401 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 [2020-07-07 11:13:21,423 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:13:21,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:13:21,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:13:21,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:13:21,426 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:13:21,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:13:21,426 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:13:21,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:13:21,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:13:21,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:13:21,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:13:21,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:13:21,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:13:21,429 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:13:21,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:13:21,429 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:13:21,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:13:21,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:13:21,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:13:21,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:13:21,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:13:21,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:13:21,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:13:21,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:13:21,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:13:21,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:13:21,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:13:21,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:13:21,432 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:13:21,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:13:21,705 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:13:21,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:13:21,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:13:21,720 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:13:21,721 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:13:21,721 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-07-07 11:13:21,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9c27e33/98c28797cecc4ebfb6c843a356c0d804/FLAGd296ea507 [2020-07-07 11:13:22,251 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:13:22,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-1.c [2020-07-07 11:13:22,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9c27e33/98c28797cecc4ebfb6c843a356c0d804/FLAGd296ea507 [2020-07-07 11:13:22,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9c27e33/98c28797cecc4ebfb6c843a356c0d804 [2020-07-07 11:13:22,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:13:22,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:13:22,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:13:22,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:13:22,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:13:22,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:13:22" (1/1) ... [2020-07-07 11:13:22,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c2d01c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22, skipping insertion in model container [2020-07-07 11:13:22,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:13:22" (1/1) ... [2020-07-07 11:13:22,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:13:22,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:13:22,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:13:22,958 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:13:22,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:13:22,989 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:13:22,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22 WrapperNode [2020-07-07 11:13:22,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:13:22,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:13:22,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:13:22,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:13:23,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22" (1/1) ... [2020-07-07 11:13:23,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22" (1/1) ... [2020-07-07 11:13:23,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22" (1/1) ... [2020-07-07 11:13:23,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22" (1/1) ... [2020-07-07 11:13:23,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22" (1/1) ... [2020-07-07 11:13:23,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22" (1/1) ... [2020-07-07 11:13:23,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22" (1/1) ... [2020-07-07 11:13:23,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:13:23,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:13:23,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:13:23,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:13:23,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22" (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 [2020-07-07 11:13:23,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:13:23,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:13:23,169 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-07 11:13:23,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:13:23,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:13:23,170 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-07 11:13:23,170 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:13:23,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:13:23,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:13:23,329 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:13:23,329 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:13:23,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:13:23 BoogieIcfgContainer [2020-07-07 11:13:23,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:13:23,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:13:23,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:13:23,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:13:23,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:13:22" (1/3) ... [2020-07-07 11:13:23,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c9f1e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:13:23, skipping insertion in model container [2020-07-07 11:13:23,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:22" (2/3) ... [2020-07-07 11:13:23,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c9f1e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:13:23, skipping insertion in model container [2020-07-07 11:13:23,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:13:23" (3/3) ... [2020-07-07 11:13:23,342 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2020-07-07 11:13:23,352 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:13:23,358 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:13:23,372 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:13:23,396 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:13:23,396 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:13:23,396 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:13:23,396 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:13:23,397 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:13:23,397 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:13:23,397 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:13:23,397 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:13:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-07 11:13:23,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:13:23,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:23,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:23,423 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:23,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:23,428 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-07 11:13:23,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:23,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522212516] [2020-07-07 11:13:23,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:13:23,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522212516] [2020-07-07 11:13:23,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:13:23,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:13:23,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521764537] [2020-07-07 11:13:23,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:13:23,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:23,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:13:23,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:13:23,669 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-07 11:13:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:23,754 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-07 11:13:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:13:23,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:13:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:23,769 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:13:23,770 INFO L226 Difference]: Without dead ends: 18 [2020-07-07 11:13:23,774 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 [2020-07-07 11:13:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-07 11:13:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-07 11:13:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 11:13:23,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-07 11:13:23,834 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-07 11:13:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:23,834 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-07 11:13:23,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:13:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-07 11:13:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:13:23,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:23,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:23,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:13:23,843 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:23,844 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-07 11:13:23,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:23,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792668559] [2020-07-07 11:13:23,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:13:24,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792668559] [2020-07-07 11:13:24,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813864690] [2020-07-07 11:13:24,027 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 [2020-07-07 11:13:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:13:24,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:13:24,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:24,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-07 11:13:24,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19606951] [2020-07-07 11:13:24,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:13:24,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:24,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:13:24,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:13:24,158 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-07 11:13:24,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:24,222 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-07 11:13:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:13:24,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-07 11:13:24,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:24,224 INFO L225 Difference]: With dead ends: 25 [2020-07-07 11:13:24,224 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 11:13:24,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:13:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 11:13:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 11:13:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:13:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-07 11:13:24,233 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-07 11:13:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:24,233 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-07 11:13:24,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:13:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-07 11:13:24,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:13:24,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:24,235 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:24,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:13:24,451 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-07 11:13:24,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:24,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694437288] [2020-07-07 11:13:24,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:13:24,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694437288] [2020-07-07 11:13:24,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227386174] [2020-07-07 11:13:24,668 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 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 [2020-07-07 11:13:24,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:24,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:24,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:13:24,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:13:24,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:24,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-07 11:13:24,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888301948] [2020-07-07 11:13:24,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:13:24,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:24,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:13:24,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:13:24,749 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-07 11:13:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:24,838 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-07 11:13:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:13:24,839 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-07 11:13:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:24,840 INFO L225 Difference]: With dead ends: 28 [2020-07-07 11:13:24,840 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 11:13:24,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:13:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 11:13:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 11:13:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 11:13:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-07 11:13:24,855 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-07 11:13:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:24,856 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-07 11:13:24,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:13:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-07 11:13:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:13:24,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:24,859 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:25,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:25,073 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:25,074 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-07 11:13:25,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:25,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447435227] [2020-07-07 11:13:25,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:13:25,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447435227] [2020-07-07 11:13:25,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955738126] [2020-07-07 11:13:25,228 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 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 [2020-07-07 11:13:25,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:13:25,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:25,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:13:25,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:13:25,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:25,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-07 11:13:25,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195005090] [2020-07-07 11:13:25,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:13:25,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:25,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:13:25,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:13:25,298 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-07 11:13:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:25,374 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-07 11:13:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:13:25,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-07 11:13:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:25,376 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:13:25,376 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:13:25,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:13:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:13:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-07 11:13:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:13:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-07 11:13:25,384 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-07 11:13:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:25,384 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-07 11:13:25,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:13:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-07 11:13:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:13:25,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:25,386 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:25,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:25,602 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:25,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:25,603 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-07 11:13:25,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:25,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904886490] [2020-07-07 11:13:25,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:13:25,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904886490] [2020-07-07 11:13:25,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576994287] [2020-07-07 11:13:25,846 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 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 [2020-07-07 11:13:25,888 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:13:25,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:25,889 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:13:25,895 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:13:25,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:25,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-07 11:13:25,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981821443] [2020-07-07 11:13:25,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:13:25,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:25,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:13:25,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:13:25,945 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-07 11:13:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:26,056 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-07 11:13:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:13:26,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-07 11:13:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:26,061 INFO L225 Difference]: With dead ends: 34 [2020-07-07 11:13:26,061 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:13:26,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:13:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:13:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 11:13:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:13:26,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-07 11:13:26,073 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-07 11:13:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:26,074 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-07 11:13:26,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:13:26,074 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-07 11:13:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 11:13:26,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:26,077 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:26,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:26,279 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:26,279 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-07 11:13:26,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:26,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235668711] [2020-07-07 11:13:26,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:13:26,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235668711] [2020-07-07 11:13:26,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426854517] [2020-07-07 11:13:26,463 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 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 [2020-07-07 11:13:26,508 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 11:13:26,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:26,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:13:26,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:13:26,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:26,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-07 11:13:26,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113773041] [2020-07-07 11:13:26,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:13:26,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:26,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:13:26,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:13:26,557 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-07 11:13:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:26,642 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-07 11:13:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:13:26,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-07 11:13:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:26,644 INFO L225 Difference]: With dead ends: 37 [2020-07-07 11:13:26,645 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:13:26,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:13:26,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:13:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-07 11:13:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:13:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-07 11:13:26,652 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-07 11:13:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:26,652 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-07 11:13:26,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:13:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-07 11:13:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:13:26,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:26,654 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:26,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:13:26,869 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-07 11:13:26,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:26,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933879454] [2020-07-07 11:13:26,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:13:27,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933879454] [2020-07-07 11:13:27,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188185122] [2020-07-07 11:13:27,084 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 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 [2020-07-07 11:13:27,139 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 11:13:27,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:27,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:13:27,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:13:27,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:27,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-07 11:13:27,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950747493] [2020-07-07 11:13:27,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:13:27,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:13:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:13:27,182 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-07 11:13:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:27,293 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-07 11:13:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:13:27,294 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-07 11:13:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:27,295 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:13:27,295 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:13:27,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:13:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:13:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:13:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:13:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-07 11:13:27,303 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-07 11:13:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:27,304 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-07 11:13:27,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:13:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-07 11:13:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 11:13:27,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:27,305 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:27,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:27,520 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:27,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-07 11:13:27,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:27,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843088825] [2020-07-07 11:13:27,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:13:27,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843088825] [2020-07-07 11:13:27,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392519210] [2020-07-07 11:13:27,746 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 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 [2020-07-07 11:13:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-07 11:13:27,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:13:27,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:27,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-07 11:13:27,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548237821] [2020-07-07 11:13:27,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:13:27,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:27,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:13:27,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:13:27,824 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-07 11:13:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:27,939 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-07 11:13:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:13:27,940 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-07 11:13:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:27,943 INFO L225 Difference]: With dead ends: 43 [2020-07-07 11:13:27,943 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:13:27,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:13:27,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:13:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-07 11:13:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:13:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-07 11:13:27,954 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-07 11:13:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:27,954 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-07 11:13:27,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:13:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-07 11:13:27,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 11:13:27,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:27,957 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:28,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:28,173 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:28,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-07 11:13:28,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:28,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211575619] [2020-07-07 11:13:28,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:13:28,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211575619] [2020-07-07 11:13:28,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147984951] [2020-07-07 11:13:28,468 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 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 [2020-07-07 11:13:28,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:28,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:28,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-07 11:13:28,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:13:28,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:28,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-07 11:13:28,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979791722] [2020-07-07 11:13:28,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:13:28,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:28,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:13:28,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:13:28,623 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-07 11:13:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:28,759 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-07 11:13:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:13:28,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-07 11:13:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:28,761 INFO L225 Difference]: With dead ends: 46 [2020-07-07 11:13:28,761 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 11:13:28,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:13:28,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 11:13:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 11:13:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 11:13:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-07 11:13:28,769 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-07 11:13:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:28,769 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-07 11:13:28,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:13:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-07 11:13:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 11:13:28,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:28,771 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:28,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:13:28,987 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:28,987 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-07 11:13:28,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:28,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514208114] [2020-07-07 11:13:28,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:13:29,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514208114] [2020-07-07 11:13:29,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688748631] [2020-07-07 11:13:29,265 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 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 [2020-07-07 11:13:29,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-07 11:13:29,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:29,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-07 11:13:29,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:13:29,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:29,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-07 11:13:29,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805620638] [2020-07-07 11:13:29,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:13:29,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:29,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:13:29,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:13:29,356 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-07 11:13:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:29,502 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-07 11:13:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:13:29,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-07 11:13:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:29,504 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:13:29,504 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 11:13:29,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-07 11:13:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 11:13:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-07 11:13:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:13:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-07 11:13:29,518 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-07 11:13:29,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:29,520 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-07 11:13:29,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:13:29,520 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-07 11:13:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-07 11:13:29,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:29,524 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:29,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:29,726 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:29,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-07 11:13:29,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:29,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777198015] [2020-07-07 11:13:29,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-07 11:13:30,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777198015] [2020-07-07 11:13:30,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293824358] [2020-07-07 11:13:30,102 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:30,148 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:13:30,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:30,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-07 11:13:30,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-07 11:13:30,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:30,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-07 11:13:30,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140496435] [2020-07-07 11:13:30,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:13:30,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:30,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:13:30,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:13:30,200 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-07 11:13:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:30,356 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-07 11:13:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:13:30,357 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-07 11:13:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:30,359 INFO L225 Difference]: With dead ends: 52 [2020-07-07 11:13:30,359 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 11:13:30,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-07 11:13:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 11:13:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-07 11:13:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 11:13:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-07 11:13:30,371 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-07 11:13:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:30,373 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-07 11:13:30,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:13:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-07 11:13:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 11:13:30,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:30,375 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:30,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:30,588 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:30,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-07 11:13:30,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:30,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124064429] [2020-07-07 11:13:30,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-07 11:13:30,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124064429] [2020-07-07 11:13:30,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227220443] [2020-07-07 11:13:30,958 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:31,003 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-07 11:13:31,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:31,005 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-07 11:13:31,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-07 11:13:31,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:31,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-07 11:13:31,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259060159] [2020-07-07 11:13:31,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:13:31,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:31,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:13:31,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:13:31,049 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-07 11:13:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:31,206 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-07 11:13:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:13:31,207 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-07 11:13:31,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:31,208 INFO L225 Difference]: With dead ends: 55 [2020-07-07 11:13:31,208 INFO L226 Difference]: Without dead ends: 51 [2020-07-07 11:13:31,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-07 11:13:31,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-07 11:13:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-07 11:13:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 11:13:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-07 11:13:31,215 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-07 11:13:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:31,215 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-07 11:13:31,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:13:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-07 11:13:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-07 11:13:31,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:31,217 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:31,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-07 11:13:31,430 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:31,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:31,431 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-07 11:13:31,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:31,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666000695] [2020-07-07 11:13:31,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-07 11:13:31,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666000695] [2020-07-07 11:13:31,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801811254] [2020-07-07 11:13:31,905 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:31,957 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-07 11:13:31,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:31,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-07 11:13:31,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-07 11:13:32,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:32,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-07 11:13:32,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772323313] [2020-07-07 11:13:32,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:13:32,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:32,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:13:32,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:13:32,005 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-07 11:13:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:32,177 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-07 11:13:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 11:13:32,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-07 11:13:32,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:32,178 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:13:32,179 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 11:13:32,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-07 11:13:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 11:13:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-07 11:13:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:13:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-07 11:13:32,185 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-07 11:13:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:32,186 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-07 11:13:32,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:13:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-07 11:13:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 11:13:32,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:32,187 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:32,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 11:13:32,391 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:32,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-07 11:13:32,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:32,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127304942] [2020-07-07 11:13:32,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-07 11:13:32,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127304942] [2020-07-07 11:13:32,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268371213] [2020-07-07 11:13:32,898 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-07 11:13:32,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-07 11:13:32,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:32,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-07 11:13:32,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354796287] [2020-07-07 11:13:32,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 11:13:32,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:32,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 11:13:32,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:13:32,996 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-07 11:13:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:33,169 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-07 11:13:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 11:13:33,170 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-07 11:13:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:33,171 INFO L225 Difference]: With dead ends: 61 [2020-07-07 11:13:33,171 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 11:13:33,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 11:13:33,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 11:13:33,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-07 11:13:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:13:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-07 11:13:33,178 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-07 11:13:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:33,179 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-07 11:13:33,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 11:13:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-07 11:13:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-07 11:13:33,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:33,180 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:33,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-07 11:13:33,382 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:33,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-07 11:13:33,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:33,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477598188] [2020-07-07 11:13:33,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-07 11:13:33,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477598188] [2020-07-07 11:13:33,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110964574] [2020-07-07 11:13:33,950 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:34,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:34,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:34,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-07 11:13:34,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-07 11:13:34,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:34,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-07 11:13:34,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125363655] [2020-07-07 11:13:34,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:13:34,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:34,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:13:34,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:13:34,053 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-07 11:13:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:34,270 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-07 11:13:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:13:34,270 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-07 11:13:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:34,271 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:13:34,271 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:13:34,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 11:13:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:13:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-07 11:13:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:13:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-07 11:13:34,284 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-07 11:13:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:34,285 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-07 11:13:34,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:13:34,285 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-07 11:13:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-07 11:13:34,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:34,287 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:34,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:34,488 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-07 11:13:34,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:34,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30636564] [2020-07-07 11:13:34,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-07 11:13:35,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30636564] [2020-07-07 11:13:35,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368431376] [2020-07-07 11:13:35,113 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:35,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-07 11:13:35,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:35,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-07 11:13:35,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-07 11:13:35,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:35,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-07-07 11:13:35,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528949836] [2020-07-07 11:13:35,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 11:13:35,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:35,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 11:13:35,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:13:35,263 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 21 states. [2020-07-07 11:13:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:35,495 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-07 11:13:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 11:13:35,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-07-07 11:13:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:35,496 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:13:35,497 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:13:35,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 11:13:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:13:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-07 11:13:35,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 11:13:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-07 11:13:35,503 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-07 11:13:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:35,503 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-07 11:13:35,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 11:13:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-07 11:13:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-07 11:13:35,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:35,505 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:35,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-07 11:13:35,717 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-07-07 11:13:35,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:35,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023412009] [2020-07-07 11:13:35,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-07 11:13:36,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023412009] [2020-07-07 11:13:36,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233172527] [2020-07-07 11:13:36,313 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:36,366 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:13:36,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:36,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-07 11:13:36,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-07 11:13:36,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:36,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-07-07 11:13:36,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547134699] [2020-07-07 11:13:36,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:13:36,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:36,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:13:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:13:36,419 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 22 states. [2020-07-07 11:13:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:36,684 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-07 11:13:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 11:13:36,684 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-07-07 11:13:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:36,686 INFO L225 Difference]: With dead ends: 70 [2020-07-07 11:13:36,686 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:13:36,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 11:13:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:13:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-07 11:13:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-07 11:13:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-07 11:13:36,694 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-07 11:13:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:36,695 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-07 11:13:36,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:13:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-07 11:13:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-07 11:13:36,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:36,698 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:36,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-07 11:13:36,910 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:36,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-07-07 11:13:36,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:36,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457737476] [2020-07-07 11:13:36,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-07 11:13:37,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457737476] [2020-07-07 11:13:37,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103204551] [2020-07-07 11:13:37,696 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:37,791 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-07-07 11:13:37,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:37,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-07 11:13:37,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-07 11:13:37,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:37,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-07-07 11:13:37,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535471206] [2020-07-07 11:13:37,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 11:13:37,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:37,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 11:13:37,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:13:37,868 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 23 states. [2020-07-07 11:13:38,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:38,229 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-07 11:13:38,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 11:13:38,230 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-07-07 11:13:38,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:38,231 INFO L225 Difference]: With dead ends: 73 [2020-07-07 11:13:38,231 INFO L226 Difference]: Without dead ends: 69 [2020-07-07 11:13:38,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 11:13:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-07 11:13:38,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-07 11:13:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-07 11:13:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-07 11:13:38,238 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-07 11:13:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:38,239 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-07 11:13:38,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 11:13:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-07 11:13:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 11:13:38,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:38,241 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:38,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-07 11:13:38,455 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-07-07 11:13:38,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:38,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045022366] [2020-07-07 11:13:38,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-07 11:13:39,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045022366] [2020-07-07 11:13:39,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665045027] [2020-07-07 11:13:39,159 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:39,230 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-07-07 11:13:39,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:39,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-07 11:13:39,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-07 11:13:39,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:39,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-07-07 11:13:39,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749624030] [2020-07-07 11:13:39,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 11:13:39,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:39,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 11:13:39,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:13:39,322 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 24 states. [2020-07-07 11:13:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:39,570 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-07 11:13:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 11:13:39,570 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-07-07 11:13:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:39,571 INFO L225 Difference]: With dead ends: 76 [2020-07-07 11:13:39,571 INFO L226 Difference]: Without dead ends: 72 [2020-07-07 11:13:39,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 11:13:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-07 11:13:39,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-07 11:13:39,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-07 11:13:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-07 11:13:39,576 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-07 11:13:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:39,577 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-07 11:13:39,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 11:13:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-07 11:13:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-07 11:13:39,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:39,579 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:39,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:39,791 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:39,791 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-07-07 11:13:39,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:39,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621645836] [2020-07-07 11:13:39,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-07 11:13:40,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621645836] [2020-07-07 11:13:40,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867793450] [2020-07-07 11:13:40,652 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:40,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-07 11:13:40,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-07 11:13:40,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:40,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-07-07 11:13:40,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322117890] [2020-07-07 11:13:40,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 11:13:40,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:40,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 11:13:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-07 11:13:40,800 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 25 states. [2020-07-07 11:13:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:41,121 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-07 11:13:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 11:13:41,122 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2020-07-07 11:13:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:41,123 INFO L225 Difference]: With dead ends: 79 [2020-07-07 11:13:41,123 INFO L226 Difference]: Without dead ends: 75 [2020-07-07 11:13:41,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 11:13:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-07 11:13:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-07 11:13:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-07 11:13:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-07 11:13:41,128 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-07 11:13:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:41,129 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-07 11:13:41,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 11:13:41,129 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-07 11:13:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-07 11:13:41,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:41,130 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:41,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:41,344 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-07-07 11:13:41,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:41,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956354342] [2020-07-07 11:13:41,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:13:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:13:41,411 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:13:41,412 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:13:41,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 11:13:41,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:13:41 BoogieIcfgContainer [2020-07-07 11:13:41,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:13:41,461 INFO L168 Benchmark]: Toolchain (without parser) took 18691.56 ms. Allocated memory was 137.9 MB in the beginning and 493.4 MB in the end (delta: 355.5 MB). Free memory was 102.3 MB in the beginning and 210.6 MB in the end (delta: -108.3 MB). Peak memory consumption was 247.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:41,461 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:13:41,462 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.26 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:41,462 INFO L168 Benchmark]: Boogie Preprocessor took 27.80 ms. Allocated memory is still 137.9 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:41,463 INFO L168 Benchmark]: RCFGBuilder took 314.51 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 169.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:41,463 INFO L168 Benchmark]: TraceAbstraction took 18123.71 ms. Allocated memory was 201.3 MB in the beginning and 493.4 MB in the end (delta: 292.0 MB). Free memory was 168.8 MB in the beginning and 210.6 MB in the end (delta: -41.8 MB). Peak memory consumption was 250.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:41,465 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 220.26 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.80 ms. Allocated memory is still 137.9 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 314.51 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 169.5 MB in the end (delta: -78.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18123.71 ms. Allocated memory was 201.3 MB in the beginning and 493.4 MB in the end (delta: 292.0 MB). Free memory was 168.8 MB in the beginning and 210.6 MB in the end (delta: -41.8 MB). Peak memory consumption was 250.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 20; [L13] int b = 0; VAL [a=20, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) VAL [a=20, b=0, sum(a, b)=20] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=20, b=0, result=20] [L16] __VERIFIER_error() VAL [a=20, b=0, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.0s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 243 SDtfs, 883 SDslu, 1148 SDs, 0 SdLazy, 821 SolverSat, 227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2308 GetRequests, 1829 SyntacticMatches, 0 SemanticMatches, 479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2920 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 602160 SizeOfPredicates, 228 NumberOfNonLiveVariables, 4123 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...