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/reducercommutativity/max20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:29,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:29,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:29,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:29,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:29,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:29,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:29,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:29,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:29,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:29,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:29,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:29,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:29,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:29,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:29,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:29,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:29,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:29,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:29,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:29,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:29,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:29,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:29,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:29,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:29,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:29,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:29,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:29,603 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:29,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:29,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:29,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:29,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:29,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:29,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:29,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:29,608 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 [2019-10-14 23:42:29,622 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:29,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:29,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:29,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:29,624 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:29,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:29,625 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:29,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:29,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:29,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:29,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:29,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:29,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:29,626 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:29,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:29,626 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:29,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:29,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:29,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:29,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:29,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:29,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:29,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:29,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:29,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:29,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:29,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:29,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:29,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:29,912 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:29,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:29,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:29,930 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:29,931 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:29,932 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max20-1.i [2019-10-14 23:42:30,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3410fc3c6/acb0c248d47f425a8c913ddedc962da7/FLAGa22e91fd7 [2019-10-14 23:42:30,502 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:30,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max20-1.i [2019-10-14 23:42:30,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3410fc3c6/acb0c248d47f425a8c913ddedc962da7/FLAGa22e91fd7 [2019-10-14 23:42:30,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3410fc3c6/acb0c248d47f425a8c913ddedc962da7 [2019-10-14 23:42:30,912 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:30,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:30,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:30,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:30,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:30,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52da3fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30, skipping insertion in model container [2019-10-14 23:42:30,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,928 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:30,946 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:31,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:31,124 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:31,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:31,161 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:31,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31 WrapperNode [2019-10-14 23:42:31,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:31,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:31,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:31,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:31,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:31,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:31,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:31,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:31,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (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 [2019-10-14 23:42:31,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:31,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:31,338 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-10-14 23:42:31,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:31,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:31,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:31,338 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-10-14 23:42:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:31,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:31,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:31,641 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:31,641 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:42:31,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:31 BoogieIcfgContainer [2019-10-14 23:42:31,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:31,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:31,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:31,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:31,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:30" (1/3) ... [2019-10-14 23:42:31,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a13fed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:31, skipping insertion in model container [2019-10-14 23:42:31,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (2/3) ... [2019-10-14 23:42:31,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a13fed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:31, skipping insertion in model container [2019-10-14 23:42:31,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:31" (3/3) ... [2019-10-14 23:42:31,651 INFO L109 eAbstractionObserver]: Analyzing ICFG max20-1.i [2019-10-14 23:42:31,673 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:31,682 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:31,692 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:31,717 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:31,717 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:31,718 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:31,718 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:31,718 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:31,718 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:31,718 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:31,718 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 23:42:31,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:31,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:31,744 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:31,746 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:31,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1379671032, now seen corresponding path program 1 times [2019-10-14 23:42:31,761 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:31,762 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247565803] [2019-10-14 23:42:31,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:31,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:31,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:32,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247565803] [2019-10-14 23:42:32,052 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:32,055 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:32,056 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873966430] [2019-10-14 23:42:32,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:32,062 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:32,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:32,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:32,081 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-10-14 23:42:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:32,257 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2019-10-14 23:42:32,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:32,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-14 23:42:32,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:32,275 INFO L225 Difference]: With dead ends: 60 [2019-10-14 23:42:32,275 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:42:32,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:42:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:42:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:42:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 23:42:32,330 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 32 [2019-10-14 23:42:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:32,331 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 23:42:32,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 23:42:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:42:32,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:32,335 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:32,335 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:32,336 INFO L82 PathProgramCache]: Analyzing trace with hash 551744077, now seen corresponding path program 1 times [2019-10-14 23:42:32,336 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:32,336 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043575647] [2019-10-14 23:42:32,337 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,337 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:42:32,453 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043575647] [2019-10-14 23:42:32,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600495341] [2019-10-14 23:42:32,456 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 [2019-10-14 23:42:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:32,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:42:32,598 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:32,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:42:32,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098597757] [2019-10-14 23:42:32,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:32,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:32,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:32,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:32,603 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-10-14 23:42:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:32,633 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2019-10-14 23:42:32,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:32,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:42:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:32,635 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:42:32,635 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:42:32,637 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:42:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-14 23:42:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:42:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 23:42:32,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2019-10-14 23:42:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:32,646 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 23:42:32,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 23:42:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:42:32,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:32,648 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:32,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:32,854 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:32,855 INFO L82 PathProgramCache]: Analyzing trace with hash 727331048, now seen corresponding path program 1 times [2019-10-14 23:42:32,856 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:32,856 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072609388] [2019-10-14 23:42:32,856 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:33,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072609388] [2019-10-14 23:42:33,067 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:33,067 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:33,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403687571] [2019-10-14 23:42:33,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:33,069 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:33,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:33,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:33,071 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2019-10-14 23:42:33,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:33,191 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-10-14 23:42:33,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:33,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-10-14 23:42:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:33,195 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:42:33,195 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:42:33,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:42:33,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-14 23:42:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:42:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-14 23:42:33,203 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 46 [2019-10-14 23:42:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:33,206 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-14 23:42:33,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-14 23:42:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:42:33,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:33,208 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:33,208 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:33,209 INFO L82 PathProgramCache]: Analyzing trace with hash -270429754, now seen corresponding path program 1 times [2019-10-14 23:42:33,209 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:33,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784082570] [2019-10-14 23:42:33,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,209 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:33,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784082570] [2019-10-14 23:42:33,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083451921] [2019-10-14 23:42:33,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:33,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:33,460 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:33,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:42:33,460 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789130306] [2019-10-14 23:42:33,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:33,461 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:33,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:33,462 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2019-10-14 23:42:33,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:33,572 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-14 23:42:33,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:33,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2019-10-14 23:42:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:33,574 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:33,574 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:42:33,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:42:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 23:42:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:42:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-14 23:42:33,582 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 48 [2019-10-14 23:42:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:33,582 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-14 23:42:33,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-14 23:42:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:42:33,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:33,584 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:33,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:33,788 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1585951496, now seen corresponding path program 2 times [2019-10-14 23:42:33,789 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:33,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729681135] [2019-10-14 23:42:33,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:33,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729681135] [2019-10-14 23:42:33,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901214745] [2019-10-14 23:42:33,910 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:33,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:33,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:33,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:33,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:34,011 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:34,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:42:34,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309807371] [2019-10-14 23:42:34,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:34,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:34,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:34,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:34,015 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2019-10-14 23:42:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:34,116 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-10-14 23:42:34,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:34,116 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 23:42:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:34,117 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:42:34,117 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:42:34,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:42:34,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 23:42:34,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:42:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-14 23:42:34,124 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 50 [2019-10-14 23:42:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:34,125 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-14 23:42:34,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:34,125 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-14 23:42:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:42:34,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:34,126 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:34,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:34,330 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:34,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:34,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1138062390, now seen corresponding path program 3 times [2019-10-14 23:42:34,331 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:34,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568265510] [2019-10-14 23:42:34,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:34,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568265510] [2019-10-14 23:42:34,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303502988] [2019-10-14 23:42:34,481 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:34,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:42:34,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:34,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:34,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 23:42:34,580 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:34,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:42:34,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112257133] [2019-10-14 23:42:34,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:34,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:34,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:34,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:34,582 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 9 states. [2019-10-14 23:42:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:34,751 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2019-10-14 23:42:34,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:34,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 23:42:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:34,753 INFO L225 Difference]: With dead ends: 67 [2019-10-14 23:42:34,754 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:42:34,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:42:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-10-14 23:42:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:42:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 23:42:34,762 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 52 [2019-10-14 23:42:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:34,763 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 23:42:34,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 23:42:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:42:34,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:34,764 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:34,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:34,969 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash 454933031, now seen corresponding path program 4 times [2019-10-14 23:42:34,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:34,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334346726] [2019-10-14 23:42:34,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 23:42:35,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334346726] [2019-10-14 23:42:35,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929314662] [2019-10-14 23:42:35,112 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:35,198 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:35,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:35,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:35,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 23:42:35,243 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:35,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:42:35,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847573038] [2019-10-14 23:42:35,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:35,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:35,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:35,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:35,246 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2019-10-14 23:42:35,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:35,371 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-10-14 23:42:35,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:35,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2019-10-14 23:42:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:35,372 INFO L225 Difference]: With dead ends: 70 [2019-10-14 23:42:35,372 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:42:35,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:42:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-14 23:42:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:42:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-10-14 23:42:35,380 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 66 [2019-10-14 23:42:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:35,380 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-10-14 23:42:35,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-10-14 23:42:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 23:42:35,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:35,382 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:35,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:35,586 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1758121705, now seen corresponding path program 5 times [2019-10-14 23:42:35,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:35,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048877270] [2019-10-14 23:42:35,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:35,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:35,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 23:42:35,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048877270] [2019-10-14 23:42:35,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497043138] [2019-10-14 23:42:35,689 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:35,770 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 23:42:35,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:35,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:35,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-14 23:42:35,813 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:35,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 23:42:35,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972101599] [2019-10-14 23:42:35,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:35,815 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:35,816 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 12 states. [2019-10-14 23:42:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:36,016 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2019-10-14 23:42:36,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:36,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2019-10-14 23:42:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:36,018 INFO L225 Difference]: With dead ends: 79 [2019-10-14 23:42:36,018 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:42:36,019 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:42:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:42:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2019-10-14 23:42:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:42:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-10-14 23:42:36,026 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 68 [2019-10-14 23:42:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:36,026 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-10-14 23:42:36,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-10-14 23:42:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 23:42:36,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:36,028 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:36,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:36,232 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:36,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1391411910, now seen corresponding path program 6 times [2019-10-14 23:42:36,234 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:36,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014266315] [2019-10-14 23:42:36,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:42:36,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014266315] [2019-10-14 23:42:36,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372042228] [2019-10-14 23:42:36,375 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:36,461 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:42:36,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:36,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:36,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-14 23:42:36,514 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:36,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-10-14 23:42:36,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217205254] [2019-10-14 23:42:36,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:36,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:36,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:36,516 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 12 states. [2019-10-14 23:42:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:36,641 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-10-14 23:42:36,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:36,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2019-10-14 23:42:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:36,642 INFO L225 Difference]: With dead ends: 85 [2019-10-14 23:42:36,642 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:42:36,643 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:42:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-10-14 23:42:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:42:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-10-14 23:42:36,652 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 82 [2019-10-14 23:42:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:36,652 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-10-14 23:42:36,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-10-14 23:42:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 23:42:36,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:36,655 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:36,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:36,857 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:36,858 INFO L82 PathProgramCache]: Analyzing trace with hash 197997542, now seen corresponding path program 7 times [2019-10-14 23:42:36,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:36,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112953522] [2019-10-14 23:42:36,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:42:37,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112953522] [2019-10-14 23:42:37,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395087958] [2019-10-14 23:42:37,017 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:37,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:42:37,118 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:37,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:42:37,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595945156] [2019-10-14 23:42:37,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:37,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:37,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:37,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:37,121 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 12 states. [2019-10-14 23:42:37,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:37,283 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2019-10-14 23:42:37,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:37,283 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2019-10-14 23:42:37,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:37,284 INFO L225 Difference]: With dead ends: 88 [2019-10-14 23:42:37,285 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 23:42:37,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 23:42:37,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-10-14 23:42:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 23:42:37,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2019-10-14 23:42:37,304 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 86 [2019-10-14 23:42:37,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:37,305 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2019-10-14 23:42:37,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:37,305 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2019-10-14 23:42:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 23:42:37,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:37,309 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:37,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:37,513 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:37,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:37,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1074942888, now seen corresponding path program 8 times [2019-10-14 23:42:37,514 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:37,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033734529] [2019-10-14 23:42:37,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:42:37,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033734529] [2019-10-14 23:42:37,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584125797] [2019-10-14 23:42:37,657 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:37,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:37,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:37,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:37,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:42:37,764 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:37,765 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:42:37,765 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844359494] [2019-10-14 23:42:37,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:37,767 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:37,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:37,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:37,768 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 13 states. [2019-10-14 23:42:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:37,915 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2019-10-14 23:42:37,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:37,915 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2019-10-14 23:42:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:37,916 INFO L225 Difference]: With dead ends: 90 [2019-10-14 23:42:37,916 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 23:42:37,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 23:42:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 23:42:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:42:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-10-14 23:42:37,928 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 88 [2019-10-14 23:42:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:37,929 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-10-14 23:42:37,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-10-14 23:42:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 23:42:37,934 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:37,934 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:38,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:38,148 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2005830378, now seen corresponding path program 9 times [2019-10-14 23:42:38,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:38,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588584406] [2019-10-14 23:42:38,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:42:38,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588584406] [2019-10-14 23:42:38,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180246545] [2019-10-14 23:42:38,328 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 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 [2019-10-14 23:42:38,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:42:38,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:38,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:38,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 94 proven. 4 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-10-14 23:42:38,452 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:38,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 23:42:38,453 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78909956] [2019-10-14 23:42:38,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:42:38,456 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:38,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:42:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:38,457 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 16 states. [2019-10-14 23:42:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:38,675 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2019-10-14 23:42:38,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:42:38,676 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2019-10-14 23:42:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:38,677 INFO L225 Difference]: With dead ends: 95 [2019-10-14 23:42:38,677 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:42:38,678 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:42:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-14 23:42:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:42:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2019-10-14 23:42:38,684 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 90 [2019-10-14 23:42:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:38,684 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2019-10-14 23:42:38,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:42:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2019-10-14 23:42:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:42:38,685 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:38,686 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:38,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:38,887 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:38,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1656201482, now seen corresponding path program 10 times [2019-10-14 23:42:38,888 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:38,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482144364] [2019-10-14 23:42:38,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,889 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-10-14 23:42:39,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482144364] [2019-10-14 23:42:39,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222740293] [2019-10-14 23:42:39,041 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 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 [2019-10-14 23:42:39,113 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:39,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:39,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:42:39,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-10-14 23:42:39,144 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:39,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 23:42:39,145 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274659568] [2019-10-14 23:42:39,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:42:39,146 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:39,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:42:39,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:42:39,148 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2019-10-14 23:42:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:39,311 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2019-10-14 23:42:39,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:42:39,312 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2019-10-14 23:42:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:39,313 INFO L225 Difference]: With dead ends: 98 [2019-10-14 23:42:39,313 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 23:42:39,313 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:42:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 23:42:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-10-14 23:42:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 23:42:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2019-10-14 23:42:39,319 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 94 [2019-10-14 23:42:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:39,319 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2019-10-14 23:42:39,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:42:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2019-10-14 23:42:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:42:39,321 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:39,321 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:39,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:39,525 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:39,526 INFO L82 PathProgramCache]: Analyzing trace with hash 659152588, now seen corresponding path program 11 times [2019-10-14 23:42:39,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:39,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359701300] [2019-10-14 23:42:39,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-10-14 23:42:39,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359701300] [2019-10-14 23:42:39,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852497299] [2019-10-14 23:42:39,693 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 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 [2019-10-14 23:42:39,935 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 23:42:39,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:39,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:39,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 88 proven. 15 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2019-10-14 23:42:39,992 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:39,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2019-10-14 23:42:39,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222647994] [2019-10-14 23:42:39,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:42:39,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:42:39,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:39,994 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 19 states. [2019-10-14 23:42:40,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:40,177 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2019-10-14 23:42:40,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:42:40,177 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-10-14 23:42:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:40,179 INFO L225 Difference]: With dead ends: 107 [2019-10-14 23:42:40,179 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 23:42:40,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:42:40,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 23:42:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2019-10-14 23:42:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 23:42:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2019-10-14 23:42:40,185 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 96 [2019-10-14 23:42:40,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:40,186 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2019-10-14 23:42:40,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:42:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2019-10-14 23:42:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 23:42:40,187 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:40,187 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:40,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:40,392 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:40,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:40,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1708395305, now seen corresponding path program 12 times [2019-10-14 23:42:40,393 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:40,394 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277558538] [2019-10-14 23:42:40,394 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,394 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-10-14 23:42:40,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277558538] [2019-10-14 23:42:40,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280308990] [2019-10-14 23:42:40,602 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 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 [2019-10-14 23:42:40,771 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 23:42:40,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:40,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:40,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 154 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2019-10-14 23:42:40,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:40,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 23:42:40,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752014425] [2019-10-14 23:42:40,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:42:40,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:40,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:42:40,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:42:40,840 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 20 states. [2019-10-14 23:42:41,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:41,031 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2019-10-14 23:42:41,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:42:41,031 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2019-10-14 23:42:41,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:41,033 INFO L225 Difference]: With dead ends: 113 [2019-10-14 23:42:41,033 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 23:42:41,034 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:42:41,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 23:42:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2019-10-14 23:42:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:42:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2019-10-14 23:42:41,040 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 110 [2019-10-14 23:42:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:41,040 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2019-10-14 23:42:41,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:42:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2019-10-14 23:42:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 23:42:41,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:41,041 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:41,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:41,247 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:41,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:41,247 INFO L82 PathProgramCache]: Analyzing trace with hash -356697015, now seen corresponding path program 13 times [2019-10-14 23:42:41,247 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:41,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844869553] [2019-10-14 23:42:41,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 23:42:41,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844869553] [2019-10-14 23:42:41,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079824871] [2019-10-14 23:42:41,461 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 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 [2019-10-14 23:42:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:42:41,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 23:42:41,574 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:41,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 23:42:41,575 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575039708] [2019-10-14 23:42:41,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:42:41,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:41,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:42:41,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:42:41,577 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 18 states. [2019-10-14 23:42:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:41,789 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2019-10-14 23:42:41,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:42:41,789 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2019-10-14 23:42:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:41,790 INFO L225 Difference]: With dead ends: 116 [2019-10-14 23:42:41,790 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 23:42:41,791 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:42:41,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 23:42:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-14 23:42:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:42:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2019-10-14 23:42:41,804 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 114 [2019-10-14 23:42:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:41,804 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2019-10-14 23:42:41,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:42:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2019-10-14 23:42:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 23:42:41,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:41,808 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:42,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,017 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1330051829, now seen corresponding path program 14 times [2019-10-14 23:42:42,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684566291] [2019-10-14 23:42:42,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 23:42:42,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684566291] [2019-10-14 23:42:42,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500264340] [2019-10-14 23:42:42,248 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 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 [2019-10-14 23:42:42,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:42,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:42,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:42:42,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 23:42:42,365 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:42,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 23:42:42,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091460162] [2019-10-14 23:42:42,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:42:42,366 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:42:42,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:42,367 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 19 states. [2019-10-14 23:42:42,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:42,489 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2019-10-14 23:42:42,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:42:42,489 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 116 [2019-10-14 23:42:42,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:42,490 INFO L225 Difference]: With dead ends: 118 [2019-10-14 23:42:42,490 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 23:42:42,491 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 23:42:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-14 23:42:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 23:42:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2019-10-14 23:42:42,497 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 116 [2019-10-14 23:42:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:42,497 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2019-10-14 23:42:42,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:42:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2019-10-14 23:42:42,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-14 23:42:42,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:42,498 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:42,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,702 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,702 INFO L82 PathProgramCache]: Analyzing trace with hash -421157555, now seen corresponding path program 15 times [2019-10-14 23:42:42,703 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437289339] [2019-10-14 23:42:42,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 23:42:43,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437289339] [2019-10-14 23:42:43,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480381506] [2019-10-14 23:42:43,012 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 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 [2019-10-14 23:42:43,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 23:42:43,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:43,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:43,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 152 proven. 28 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-10-14 23:42:43,267 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:43,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 23:42:43,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863663771] [2019-10-14 23:42:43,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:42:43,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:43,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:42:43,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:43,270 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 24 states. [2019-10-14 23:42:43,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,601 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2019-10-14 23:42:43,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:42:43,601 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 118 [2019-10-14 23:42:43,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,602 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:42:43,602 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 23:42:43,603 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:42:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 23:42:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2019-10-14 23:42:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 23:42:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2019-10-14 23:42:43,608 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 118 [2019-10-14 23:42:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,608 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2019-10-14 23:42:43,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:42:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2019-10-14 23:42:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:42:43,610 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,610 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:43,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,811 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1792802646, now seen corresponding path program 16 times [2019-10-14 23:42:43,812 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:43,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424339029] [2019-10-14 23:42:43,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-10-14 23:42:44,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424339029] [2019-10-14 23:42:44,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19609751] [2019-10-14 23:42:44,072 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 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 [2019-10-14 23:42:44,175 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:44,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:44,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:42:44,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-10-14 23:42:44,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:44,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 23:42:44,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071651737] [2019-10-14 23:42:44,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:42:44,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:44,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:42:44,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:44,207 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 21 states. [2019-10-14 23:42:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:44,406 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2019-10-14 23:42:44,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:42:44,406 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 132 [2019-10-14 23:42:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:44,407 INFO L225 Difference]: With dead ends: 130 [2019-10-14 23:42:44,407 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 23:42:44,408 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 23:42:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-10-14 23:42:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 23:42:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2019-10-14 23:42:44,412 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 132 [2019-10-14 23:42:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:44,412 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2019-10-14 23:42:44,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:42:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2019-10-14 23:42:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:42:44,413 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:44,414 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:44,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,615 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash -371467028, now seen corresponding path program 17 times [2019-10-14 23:42:44,616 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:44,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530734028] [2019-10-14 23:42:44,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-10-14 23:42:44,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530734028] [2019-10-14 23:42:44,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703585072] [2019-10-14 23:42:44,884 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 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 [2019-10-14 23:42:45,354 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 23:42:45,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:45,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:45,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 224 proven. 45 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2019-10-14 23:42:45,495 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:45,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-10-14 23:42:45,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590132056] [2019-10-14 23:42:45,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:42:45,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:42:45,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:45,497 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 27 states. [2019-10-14 23:42:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:45,864 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2019-10-14 23:42:45,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:42:45,864 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 134 [2019-10-14 23:42:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:45,865 INFO L225 Difference]: With dead ends: 139 [2019-10-14 23:42:45,865 INFO L226 Difference]: Without dead ends: 95 [2019-10-14 23:42:45,866 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:42:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-14 23:42:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2019-10-14 23:42:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:42:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2019-10-14 23:42:45,869 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 134 [2019-10-14 23:42:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:45,869 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2019-10-14 23:42:45,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:42:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2019-10-14 23:42:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 23:42:45,871 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:45,871 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:46,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,080 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:46,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1660813879, now seen corresponding path program 18 times [2019-10-14 23:42:46,080 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:46,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143720066] [2019-10-14 23:42:46,081 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,081 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-10-14 23:42:46,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143720066] [2019-10-14 23:42:46,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389349662] [2019-10-14 23:42:46,398 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 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 [2019-10-14 23:42:46,806 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 23:42:46,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:46,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:46,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 322 proven. 16 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2019-10-14 23:42:46,911 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:46,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-10-14 23:42:46,911 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024714684] [2019-10-14 23:42:46,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:42:46,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:42:46,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:46,912 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 27 states. [2019-10-14 23:42:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:47,142 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2019-10-14 23:42:47,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:42:47,142 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 148 [2019-10-14 23:42:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:47,144 INFO L225 Difference]: With dead ends: 145 [2019-10-14 23:42:47,144 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 23:42:47,145 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 23:42:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 23:42:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 23:42:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2019-10-14 23:42:47,149 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 148 [2019-10-14 23:42:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:47,150 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2019-10-14 23:42:47,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:42:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2019-10-14 23:42:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 23:42:47,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:47,151 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:47,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,356 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash -462803735, now seen corresponding path program 19 times [2019-10-14 23:42:47,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:47,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026954091] [2019-10-14 23:42:47,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-10-14 23:42:47,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026954091] [2019-10-14 23:42:47,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439029351] [2019-10-14 23:42:47,671 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-10-14 23:42:47,820 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:47,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 23:42:47,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181786024] [2019-10-14 23:42:47,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:42:47,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:42:47,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:47,822 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 24 states. [2019-10-14 23:42:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:47,992 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2019-10-14 23:42:47,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:42:47,994 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 152 [2019-10-14 23:42:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:47,995 INFO L225 Difference]: With dead ends: 147 [2019-10-14 23:42:47,995 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 23:42:47,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 23:42:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-10-14 23:42:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 23:42:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2019-10-14 23:42:48,001 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 152 [2019-10-14 23:42:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:48,002 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2019-10-14 23:42:48,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:42:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2019-10-14 23:42:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 23:42:48,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:48,005 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:48,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,206 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:48,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1779127339, now seen corresponding path program 20 times [2019-10-14 23:42:48,207 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:48,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252871184] [2019-10-14 23:42:48,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 320 proven. 66 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-10-14 23:42:48,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252871184] [2019-10-14 23:42:48,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780810429] [2019-10-14 23:42:48,408 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:48,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:48,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:48,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2019-10-14 23:42:48,543 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:48,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2019-10-14 23:42:48,544 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874869302] [2019-10-14 23:42:48,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:42:48,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:48,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:42:48,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:48,547 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 10 states. [2019-10-14 23:42:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:48,733 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2019-10-14 23:42:48,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:42:48,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 154 [2019-10-14 23:42:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:48,734 INFO L225 Difference]: With dead ends: 153 [2019-10-14 23:42:48,734 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 23:42:48,735 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:42:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 23:42:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-10-14 23:42:48,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 23:42:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2019-10-14 23:42:48,741 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 154 [2019-10-14 23:42:48,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:48,741 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2019-10-14 23:42:48,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:42:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2019-10-14 23:42:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 23:42:48,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:48,743 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:48,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,948 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1900284986, now seen corresponding path program 21 times [2019-10-14 23:42:48,948 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:48,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583667182] [2019-10-14 23:42:48,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 428 proven. 91 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2019-10-14 23:42:49,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583667182] [2019-10-14 23:42:49,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850088430] [2019-10-14 23:42:49,153 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:49,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 23:42:49,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:49,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:49,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 430 proven. 25 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked. [2019-10-14 23:42:49,409 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:49,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-10-14 23:42:49,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805607050] [2019-10-14 23:42:49,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:42:49,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:49,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:42:49,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:42:49,412 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 17 states. [2019-10-14 23:42:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:49,712 INFO L93 Difference]: Finished difference Result 164 states and 191 transitions. [2019-10-14 23:42:49,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:42:49,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 166 [2019-10-14 23:42:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:49,714 INFO L225 Difference]: With dead ends: 164 [2019-10-14 23:42:49,714 INFO L226 Difference]: Without dead ends: 111 [2019-10-14 23:42:49,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:42:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-14 23:42:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2019-10-14 23:42:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 23:42:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2019-10-14 23:42:49,720 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 166 [2019-10-14 23:42:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:49,720 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2019-10-14 23:42:49,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:42:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2019-10-14 23:42:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-14 23:42:49,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:49,721 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:49,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:49,926 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash 614179775, now seen corresponding path program 22 times [2019-10-14 23:42:49,927 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:49,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051162569] [2019-10-14 23:42:49,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1627 backedges. 276 proven. 396 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2019-10-14 23:42:50,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051162569] [2019-10-14 23:42:50,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538517514] [2019-10-14 23:42:50,141 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:50,262 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:50,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:50,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:50,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1627 backedges. 548 proven. 120 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2019-10-14 23:42:50,302 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:50,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2019-10-14 23:42:50,302 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515094756] [2019-10-14 23:42:50,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:50,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:50,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:50,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:50,303 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 12 states. [2019-10-14 23:42:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:50,569 INFO L93 Difference]: Finished difference Result 173 states and 201 transitions. [2019-10-14 23:42:50,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:50,570 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 180 [2019-10-14 23:42:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:50,571 INFO L225 Difference]: With dead ends: 173 [2019-10-14 23:42:50,571 INFO L226 Difference]: Without dead ends: 114 [2019-10-14 23:42:50,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-14 23:42:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2019-10-14 23:42:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-14 23:42:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2019-10-14 23:42:50,577 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 180 [2019-10-14 23:42:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:50,577 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2019-10-14 23:42:50,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2019-10-14 23:42:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-14 23:42:50,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:50,579 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:50,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:50,784 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash -65754278, now seen corresponding path program 23 times [2019-10-14 23:42:50,784 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:50,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462763662] [2019-10-14 23:42:50,784 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:50,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:50,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 692 proven. 153 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2019-10-14 23:42:51,024 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462763662] [2019-10-14 23:42:51,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087627803] [2019-10-14 23:42:51,025 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:53,460 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-10-14 23:42:53,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:53,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:42:53,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 688 proven. 153 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2019-10-14 23:42:53,496 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:53,496 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-10-14 23:42:53,496 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471360973] [2019-10-14 23:42:53,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:53,497 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:53,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:53,497 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand 13 states. [2019-10-14 23:42:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:53,786 INFO L93 Difference]: Finished difference Result 181 states and 211 transitions. [2019-10-14 23:42:53,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:42:53,786 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 192 [2019-10-14 23:42:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:53,806 INFO L225 Difference]: With dead ends: 181 [2019-10-14 23:42:53,806 INFO L226 Difference]: Without dead ends: 118 [2019-10-14 23:42:53,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:42:53,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-14 23:42:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2019-10-14 23:42:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-14 23:42:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2019-10-14 23:42:53,812 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 192 [2019-10-14 23:42:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:53,813 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2019-10-14 23:42:53,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2019-10-14 23:42:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-14 23:42:53,814 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:53,814 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:54,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:54,017 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1833262475, now seen corresponding path program 24 times [2019-10-14 23:42:54,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:54,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421485802] [2019-10-14 23:42:54,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 424 proven. 614 refuted. 0 times theorem prover too weak. 1243 trivial. 0 not checked. [2019-10-14 23:42:54,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421485802] [2019-10-14 23:42:54,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960134614] [2019-10-14 23:42:54,258 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:55,880 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-10-14 23:42:55,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:55,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:55,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2019-10-14 23:42:56,018 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:56,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2019-10-14 23:42:56,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990588640] [2019-10-14 23:42:56,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:42:56,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:56,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:42:56,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:56,019 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand 21 states. [2019-10-14 23:42:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:56,573 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2019-10-14 23:42:56,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:42:56,573 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 204 [2019-10-14 23:42:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:56,575 INFO L225 Difference]: With dead ends: 192 [2019-10-14 23:42:56,575 INFO L226 Difference]: Without dead ends: 125 [2019-10-14 23:42:56,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:42:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-14 23:42:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2019-10-14 23:42:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 23:42:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2019-10-14 23:42:56,584 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 204 [2019-10-14 23:42:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:56,584 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2019-10-14 23:42:56,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:42:56,584 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2019-10-14 23:42:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-14 23:42:56,586 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:56,586 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 20, 20, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:56,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:56,790 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:56,790 INFO L82 PathProgramCache]: Analyzing trace with hash 368002414, now seen corresponding path program 25 times [2019-10-14 23:42:56,791 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:56,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79065339] [2019-10-14 23:42:56,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2019-10-14 23:42:57,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79065339] [2019-10-14 23:42:57,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846634990] [2019-10-14 23:42:57,083 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:42:57,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1016 proven. 231 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2019-10-14 23:42:57,433 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:57,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2019-10-14 23:42:57,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896167180] [2019-10-14 23:42:57,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:42:57,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:42:57,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:42:57,436 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand 23 states. [2019-10-14 23:42:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:57,924 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2019-10-14 23:42:57,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:42:57,924 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 218 [2019-10-14 23:42:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:57,926 INFO L225 Difference]: With dead ends: 204 [2019-10-14 23:42:57,926 INFO L226 Difference]: Without dead ends: 131 [2019-10-14 23:42:57,927 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:42:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-10-14 23:42:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2019-10-14 23:42:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-14 23:42:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2019-10-14 23:42:57,932 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 218 [2019-10-14 23:42:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:57,933 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2019-10-14 23:42:57,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:42:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2019-10-14 23:42:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-14 23:42:57,935 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:57,935 INFO L380 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:58,139 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:58,140 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:58,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1889924505, now seen corresponding path program 26 times [2019-10-14 23:42:58,140 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:58,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516975709] [2019-10-14 23:42:58,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3107 backedges. 1208 proven. 276 refuted. 0 times theorem prover too weak. 1623 trivial. 0 not checked. [2019-10-14 23:42:58,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516975709] [2019-10-14 23:42:58,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443862959] [2019-10-14 23:42:58,445 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:58,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:58,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:58,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:42:58,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3107 backedges. 1204 proven. 276 refuted. 0 times theorem prover too weak. 1627 trivial. 0 not checked. [2019-10-14 23:42:58,654 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:58,654 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2019-10-14 23:42:58,654 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68951630] [2019-10-14 23:42:58,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:42:58,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:42:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:58,657 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand 16 states. [2019-10-14 23:42:59,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:59,015 INFO L93 Difference]: Finished difference Result 213 states and 249 transitions. [2019-10-14 23:42:59,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:42:59,015 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 232 [2019-10-14 23:42:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:59,016 INFO L225 Difference]: With dead ends: 213 [2019-10-14 23:42:59,017 INFO L226 Difference]: Without dead ends: 134 [2019-10-14 23:42:59,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:42:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-14 23:42:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2019-10-14 23:42:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-14 23:42:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2019-10-14 23:42:59,025 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 232 [2019-10-14 23:42:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:59,026 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2019-10-14 23:42:59,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:42:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2019-10-14 23:42:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-14 23:42:59,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:59,027 INFO L380 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 20, 20, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:59,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,234 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:59,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1902191106, now seen corresponding path program 27 times [2019-10-14 23:42:59,235 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:59,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894041731] [2019-10-14 23:42:59,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3560 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 3496 trivial. 0 not checked. [2019-10-14 23:42:59,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894041731] [2019-10-14 23:42:59,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77581751] [2019-10-14 23:42:59,485 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 23:43:00,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:00,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:00,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3560 backedges. 1414 proven. 64 refuted. 0 times theorem prover too weak. 2082 trivial. 0 not checked. [2019-10-14 23:43:00,159 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:00,160 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:43:00,160 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576828750] [2019-10-14 23:43:00,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:43:00,161 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:00,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:43:00,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:00,162 INFO L87 Difference]: Start difference. First operand 131 states and 148 transitions. Second operand 13 states. [2019-10-14 23:43:00,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:00,322 INFO L93 Difference]: Finished difference Result 197 states and 228 transitions. [2019-10-14 23:43:00,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:00,323 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 244 [2019-10-14 23:43:00,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:00,324 INFO L225 Difference]: With dead ends: 197 [2019-10-14 23:43:00,324 INFO L226 Difference]: Without dead ends: 134 [2019-10-14 23:43:00,325 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-14 23:43:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-10-14 23:43:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-14 23:43:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2019-10-14 23:43:00,331 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 244 [2019-10-14 23:43:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:00,331 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2019-10-14 23:43:00,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:43:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2019-10-14 23:43:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-10-14 23:43:00,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:00,333 INFO L380 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 20, 20, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:00,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,539 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:00,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1123586400, now seen corresponding path program 28 times [2019-10-14 23:43:00,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:00,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544255221] [2019-10-14 23:43:00,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3496 trivial. 0 not checked. [2019-10-14 23:43:00,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544255221] [2019-10-14 23:43:00,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524881255] [2019-10-14 23:43:00,795 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,955 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:00,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:00,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:43:00,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 1408 proven. 325 refuted. 0 times theorem prover too weak. 1844 trivial. 0 not checked. [2019-10-14 23:43:01,208 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:01,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2019-10-14 23:43:01,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15517874] [2019-10-14 23:43:01,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:43:01,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:43:01,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:01,211 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand 27 states. [2019-10-14 23:43:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:01,806 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2019-10-14 23:43:01,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:43:01,807 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 246 [2019-10-14 23:43:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:01,808 INFO L225 Difference]: With dead ends: 228 [2019-10-14 23:43:01,809 INFO L226 Difference]: Without dead ends: 143 [2019-10-14 23:43:01,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=1215, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:43:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-10-14 23:43:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2019-10-14 23:43:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-10-14 23:43:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2019-10-14 23:43:01,815 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 246 [2019-10-14 23:43:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,815 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2019-10-14 23:43:01,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:43:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2019-10-14 23:43:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-10-14 23:43:01,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:01,817 INFO L380 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 20, 20, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:02,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,021 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:02,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1131382183, now seen corresponding path program 29 times [2019-10-14 23:43:02,022 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:02,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490978197] [2019-10-14 23:43:02,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4085 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3985 trivial. 0 not checked. [2019-10-14 23:43:02,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490978197] [2019-10-14 23:43:02,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996210217] [2019-10-14 23:43:02,327 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true