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/array-crafted/mapavg3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:40:12,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:40:12,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:40:12,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:40:12,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:40:12,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:40:12,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:40:12,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:40:12,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:40:12,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:40:12,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:40:12,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:40:12,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:40:12,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:40:12,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:40:12,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:40:12,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:40:12,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:40:12,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:40:12,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:40:12,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:40:12,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:40:12,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:40:12,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:40:12,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:40:12,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:40:12,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:40:12,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:40:12,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:40:12,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:40:12,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:40:12,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:40:12,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:40:12,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:40:12,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:40:12,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:40:12,458 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 21:40:12,492 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:40:12,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:40:12,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:40:12,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:40:12,494 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:40:12,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:40:12,495 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:40:12,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:40:12,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:40:12,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:40:12,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:40:12,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:40:12,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:40:12,496 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:40:12,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:40:12,500 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:40:12,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:40:12,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:40:12,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:40:12,501 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:40:12,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:40:12,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:40:12,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:40:12,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:40:12,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:40:12,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:40:12,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:40:12,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:40:12,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:40:12,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:40:12,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:40:12,805 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:40:12,807 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:40:12,807 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:40:12,808 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg3.i [2019-10-14 21:40:12,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23d6bd114/c91b02a24eca4a9184c39065ae7abd04/FLAG86fe07a49 [2019-10-14 21:40:13,309 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:40:13,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg3.i [2019-10-14 21:40:13,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23d6bd114/c91b02a24eca4a9184c39065ae7abd04/FLAG86fe07a49 [2019-10-14 21:40:13,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23d6bd114/c91b02a24eca4a9184c39065ae7abd04 [2019-10-14 21:40:13,747 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:40:13,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:40:13,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:13,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:40:13,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:40:13,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db268e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13, skipping insertion in model container [2019-10-14 21:40:13,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,767 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:40:13,790 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:40:14,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:14,025 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:40:14,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:14,156 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:40:14,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14 WrapperNode [2019-10-14 21:40:14,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:14,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:40:14,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:40:14,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:40:14,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2019-10-14 21:40:14,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2019-10-14 21:40:14,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2019-10-14 21:40:14,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2019-10-14 21:40:14,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2019-10-14 21:40:14,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2019-10-14 21:40:14,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (1/1) ... [2019-10-14 21:40:14,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:40:14,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:40:14,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:40:14,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:40:14,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (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 21:40:14,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:40:14,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:40:14,264 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2019-10-14 21:40:14,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:40:14,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:40:14,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:40:14,264 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2019-10-14 21:40:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:40:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:40:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:40:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:40:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:40:14,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:40:14,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:40:14,620 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:40:14,621 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:40:14,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:14 BoogieIcfgContainer [2019-10-14 21:40:14,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:40:14,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:40:14,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:40:14,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:40:14,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:40:13" (1/3) ... [2019-10-14 21:40:14,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc10270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:14, skipping insertion in model container [2019-10-14 21:40:14,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:14" (2/3) ... [2019-10-14 21:40:14,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc10270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:14, skipping insertion in model container [2019-10-14 21:40:14,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:14" (3/3) ... [2019-10-14 21:40:14,631 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg3.i [2019-10-14 21:40:14,641 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:40:14,649 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:40:14,661 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:40:14,691 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:40:14,691 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:40:14,691 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:40:14,691 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:40:14,692 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:40:14,692 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:40:14,692 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:40:14,692 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:40:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 21:40:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:40:14,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:14,718 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 21:40:14,720 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:14,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1234592251, now seen corresponding path program 1 times [2019-10-14 21:40:14,732 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:14,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812426934] [2019-10-14 21:40:14,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:14,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:14,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,983 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 21:40:14,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812426934] [2019-10-14 21:40:14,985 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:40:14,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:40:14,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974206861] [2019-10-14 21:40:14,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:14,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:15,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:15,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:40:15,004 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 21:40:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:15,131 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-14 21:40:15,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:15,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:40:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:15,145 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:40:15,145 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:40:15,151 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:40:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:40:15,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:40:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:40:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:40:15,194 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-14 21:40:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:15,195 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:40:15,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:15,195 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:40:15,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:40:15,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:15,198 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 21:40:15,198 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:15,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:15,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1054720325, now seen corresponding path program 1 times [2019-10-14 21:40:15,199 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:15,200 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012568566] [2019-10-14 21:40:15,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:40:15,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012568566] [2019-10-14 21:40:15,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213426075] [2019-10-14 21:40:15,390 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 21:40:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:40:15,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:15,528 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 21:40:15,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:40:15,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:40:15,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546886054] [2019-10-14 21:40:15,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:15,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:40:15,534 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-14 21:40:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:15,555 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-14 21:40:15,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:15,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:40:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:15,557 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:40:15,557 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:40:15,559 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:40:15,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:40:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 21:40:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:40:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 21:40:15,571 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-14 21:40:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:15,571 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 21:40:15,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 21:40:15,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:40:15,575 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:15,575 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 21:40:15,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:15,779 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:15,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1286970653, now seen corresponding path program 1 times [2019-10-14 21:40:15,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:15,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74205961] [2019-10-14 21:40:15,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,937 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 21:40:15,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74205961] [2019-10-14 21:40:15,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106928890] [2019-10-14 21:40:15,939 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 21:40:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:40:16,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:16,050 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 21:40:16,051 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:40:16,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 21:40:16,052 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072609388] [2019-10-14 21:40:16,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:16,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:16,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:16,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:40:16,054 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-14 21:40:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:16,075 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-14 21:40:16,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:16,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 21:40:16,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:16,077 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:40:16,077 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:40:16,078 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 21:40:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:40:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 21:40:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:40:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 21:40:16,092 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-14 21:40:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:16,092 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 21:40:16,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 21:40:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:40:16,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:16,095 INFO L380 BasicCegarLoop]: trace histogram [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 21:40:16,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:16,306 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:16,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash -631694085, now seen corresponding path program 1 times [2019-10-14 21:40:16,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:16,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083793307] [2019-10-14 21:40:16,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:40:16,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083793307] [2019-10-14 21:40:16,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137374284] [2019-10-14 21:40:16,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:40:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:40:16,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:40:16,539 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:40:16,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:40:16,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833003116] [2019-10-14 21:40:16,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:16,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:16,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:16,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:16,543 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-14 21:40:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:16,562 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-14 21:40:16,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:16,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-14 21:40:16,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:16,564 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:40:16,564 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:40:16,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:40:16,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:40:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:40:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 21:40:16,575 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-14 21:40:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:16,579 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 21:40:16,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 21:40:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:40:16,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:16,584 INFO L380 BasicCegarLoop]: trace histogram [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 21:40:16,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:16,790 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:16,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash -490156423, now seen corresponding path program 1 times [2019-10-14 21:40:16,791 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:16,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528055242] [2019-10-14 21:40:16,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:40:16,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528055242] [2019-10-14 21:40:16,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666405419] [2019-10-14 21:40:16,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:40:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:40:17,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 21:40:17,047 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:17,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-14 21:40:17,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222010379] [2019-10-14 21:40:17,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:40:17,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:17,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:40:17,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:40:17,055 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-14 21:40:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:17,198 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-14 21:40:17,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:40:17,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-14 21:40:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:17,201 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:40:17,201 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:40:17,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:40:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:40:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-14 21:40:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:40:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 21:40:17,214 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-14 21:40:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:17,215 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 21:40:17,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:40:17,215 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 21:40:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:40:17,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:17,218 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 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 21:40:17,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:17,421 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:17,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:17,422 INFO L82 PathProgramCache]: Analyzing trace with hash -170749255, now seen corresponding path program 2 times [2019-10-14 21:40:17,422 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:17,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873770565] [2019-10-14 21:40:17,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:40:17,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873770565] [2019-10-14 21:40:17,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564721875] [2019-10-14 21:40:17,536 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 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 21:40:17,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:17,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:17,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:40:17,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:40:17,641 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:17,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:40:17,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525022873] [2019-10-14 21:40:17,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:40:17,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:17,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:40:17,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:17,644 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-14 21:40:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:17,748 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 21:40:17,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:40:17,749 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 21:40:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:17,750 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:40:17,750 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:40:17,751 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 21:40:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:40:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 21:40:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:40:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-14 21:40:17,758 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-14 21:40:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:17,758 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-14 21:40:17,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:40:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-14 21:40:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:40:17,760 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:17,760 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 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 21:40:17,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:17,965 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash 767810715, now seen corresponding path program 3 times [2019-10-14 21:40:17,966 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:17,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685778483] [2019-10-14 21:40:17,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:40:18,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685778483] [2019-10-14 21:40:18,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864983103] [2019-10-14 21:40:18,093 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 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 21:40:18,166 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:40:18,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:18,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:40:18,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 21:40:18,207 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:18,207 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 21:40:18,207 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674506864] [2019-10-14 21:40:18,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:40:18,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:18,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:40:18,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:18,209 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-14 21:40:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:18,325 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-14 21:40:18,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:40:18,326 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 21:40:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:18,327 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:40:18,327 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:40:18,328 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:40:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-14 21:40:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:40:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 21:40:18,334 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-14 21:40:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:18,334 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 21:40:18,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:40:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 21:40:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:40:18,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:18,336 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 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 21:40:18,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:18,537 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1024452869, now seen corresponding path program 4 times [2019-10-14 21:40:18,537 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:18,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218081747] [2019-10-14 21:40:18,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:18,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:18,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:40:18,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218081747] [2019-10-14 21:40:18,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604128377] [2019-10-14 21:40:18,640 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 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 21:40:18,700 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:18,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:18,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:40:18,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:40:18,727 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:18,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:40:18,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755768029] [2019-10-14 21:40:18,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:40:18,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:18,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:40:18,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:18,729 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-14 21:40:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:18,823 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-14 21:40:18,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:40:18,823 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-14 21:40:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:18,824 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:40:18,825 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:40:18,825 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 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 21:40:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:40:18,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:40:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:40:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 21:40:18,831 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-14 21:40:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:18,832 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 21:40:18,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:40:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 21:40:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:40:18,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:18,833 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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 21:40:19,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:19,045 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:19,046 INFO L82 PathProgramCache]: Analyzing trace with hash -599330979, now seen corresponding path program 5 times [2019-10-14 21:40:19,046 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:19,046 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862410095] [2019-10-14 21:40:19,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:40:19,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862410095] [2019-10-14 21:40:19,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914312097] [2019-10-14 21:40:19,176 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 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 21:40:19,265 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:40:19,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:19,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:40:19,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:40:19,313 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:19,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:40:19,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066147229] [2019-10-14 21:40:19,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:40:19,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:19,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:40:19,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:40:19,315 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-14 21:40:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:19,456 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-14 21:40:19,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:40:19,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-14 21:40:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:19,457 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:40:19,458 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:40:19,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 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 21:40:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:40:19,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 21:40:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:40:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-14 21:40:19,469 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-14 21:40:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:19,469 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-14 21:40:19,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:40:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-14 21:40:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:40:19,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:19,472 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 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 21:40:19,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:19,677 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:19,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1877447581, now seen corresponding path program 6 times [2019-10-14 21:40:19,679 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:19,679 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023699643] [2019-10-14 21:40:19,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-14 21:40:19,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023699643] [2019-10-14 21:40:19,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726208009] [2019-10-14 21:40:19,805 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 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 21:40:19,919 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:40:19,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:19,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:40:19,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-14 21:40:20,066 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:20,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 21:40:20,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293824096] [2019-10-14 21:40:20,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:40:20,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:40:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:40:20,068 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-14 21:40:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:20,248 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-14 21:40:20,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:40:20,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 21:40:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:20,249 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:40:20,249 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:40:20,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:40:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:40:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-14 21:40:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:40:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-14 21:40:20,256 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-14 21:40:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:20,256 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-14 21:40:20,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:40:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-14 21:40:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:40:20,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:20,257 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 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 21:40:20,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:20,464 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:20,465 INFO L82 PathProgramCache]: Analyzing trace with hash -611990051, now seen corresponding path program 7 times [2019-10-14 21:40:20,466 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:20,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548518148] [2019-10-14 21:40:20,466 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:20,466 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:20,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:20,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548518148] [2019-10-14 21:40:20,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624647688] [2019-10-14 21:40:20,618 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 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 21:40:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:40:20,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:20,709 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:20,710 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:40:20,710 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075612162] [2019-10-14 21:40:20,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:40:20,711 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:40:20,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:40:20,712 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-14 21:40:20,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:20,801 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-14 21:40:20,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:40:20,801 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-14 21:40:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:20,802 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:40:20,802 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:40:20,803 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 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 21:40:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:40:20,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 21:40:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:40:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-14 21:40:20,811 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-14 21:40:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:20,812 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-14 21:40:20,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:40:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-14 21:40:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:40:20,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:20,813 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 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 21:40:21,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:21,020 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash 152046015, now seen corresponding path program 8 times [2019-10-14 21:40:21,021 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:21,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486233454] [2019-10-14 21:40:21,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:21,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:21,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:21,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486233454] [2019-10-14 21:40:21,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489890398] [2019-10-14 21:40:21,150 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 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 21:40:21,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:21,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:21,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:40:21,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:21,247 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:21,248 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:40:21,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416500118] [2019-10-14 21:40:21,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:40:21,249 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:21,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:40:21,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:40:21,249 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-14 21:40:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:21,342 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-14 21:40:21,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:40:21,342 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-14 21:40:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:21,343 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:40:21,343 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:40:21,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 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 21:40:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:40:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 21:40:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:40:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-14 21:40:21,349 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-14 21:40:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:21,350 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-14 21:40:21,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:40:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-14 21:40:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:40:21,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:21,351 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 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 21:40:21,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:21,552 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:21,552 INFO L82 PathProgramCache]: Analyzing trace with hash -48702175, now seen corresponding path program 9 times [2019-10-14 21:40:21,553 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:21,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991410025] [2019-10-14 21:40:21,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:21,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:21,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:21,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991410025] [2019-10-14 21:40:21,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330838133] [2019-10-14 21:40:21,712 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 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 21:40:21,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:40:21,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:21,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:40:21,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-14 21:40:21,852 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:21,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 21:40:21,853 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579754210] [2019-10-14 21:40:21,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:40:21,855 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:21,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:40:21,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:40:21,856 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-14 21:40:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:22,062 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-14 21:40:22,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:40:22,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-14 21:40:22,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:22,063 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:40:22,063 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:40:22,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 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 21:40:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:40:22,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 21:40:22,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:40:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-14 21:40:22,077 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-14 21:40:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:22,078 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-14 21:40:22,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:40:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-14 21:40:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 21:40:22,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:22,079 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 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 21:40:22,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:22,283 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:22,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:22,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1677678719, now seen corresponding path program 10 times [2019-10-14 21:40:22,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:22,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260749084] [2019-10-14 21:40:22,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:22,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:22,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-14 21:40:22,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260749084] [2019-10-14 21:40:22,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723024069] [2019-10-14 21:40:22,446 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 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 21:40:22,519 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:22,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:22,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:40:22,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-14 21:40:22,616 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:22,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-14 21:40:22,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207986439] [2019-10-14 21:40:22,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:40:22,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:22,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:40:22,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:40:22,618 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-14 21:40:22,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:22,910 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-14 21:40:22,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:40:22,911 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-14 21:40:22,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:22,912 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:40:22,912 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:40:22,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:40:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-14 21:40:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:40:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-14 21:40:22,924 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-14 21:40:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:22,925 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-14 21:40:22,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:40:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-14 21:40:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 21:40:22,926 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:22,926 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 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 21:40:23,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:23,130 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash 531544513, now seen corresponding path program 11 times [2019-10-14 21:40:23,131 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:23,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440840072] [2019-10-14 21:40:23,131 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:23,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:23,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-14 21:40:23,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440840072] [2019-10-14 21:40:23,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248582294] [2019-10-14 21:40:23,292 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 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 21:40:23,731 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:40:23,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:23,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:40:23,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 21:40:23,828 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:23,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-14 21:40:23,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936329228] [2019-10-14 21:40:23,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:40:23,829 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:23,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:40:23,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:40:23,829 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-14 21:40:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:24,110 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-14 21:40:24,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:40:24,110 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-14 21:40:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:24,111 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:40:24,112 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:40:24,113 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:40:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:40:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-14 21:40:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:40:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-14 21:40:24,118 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-14 21:40:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:24,118 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-14 21:40:24,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:40:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-14 21:40:24,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:40:24,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:24,120 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 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 21:40:24,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:24,331 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:24,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash 24697345, now seen corresponding path program 12 times [2019-10-14 21:40:24,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:24,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764801912] [2019-10-14 21:40:24,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:24,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:24,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 21:40:24,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764801912] [2019-10-14 21:40:24,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282939030] [2019-10-14 21:40:24,547 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 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 21:40:24,732 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:40:24,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:24,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:40:24,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-14 21:40:24,808 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:24,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 21:40:24,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838411016] [2019-10-14 21:40:24,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:40:24,809 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:24,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:40:24,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:40:24,809 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-14 21:40:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:25,025 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-14 21:40:25,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:40:25,025 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-14 21:40:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:25,027 INFO L225 Difference]: With dead ends: 105 [2019-10-14 21:40:25,027 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:40:25,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:40:25,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:40:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-14 21:40:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 21:40:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-14 21:40:25,035 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-14 21:40:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:25,035 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-14 21:40:25,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:40:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-14 21:40:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 21:40:25,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:25,037 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 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 21:40:25,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:25,243 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:25,244 INFO L82 PathProgramCache]: Analyzing trace with hash -564086943, now seen corresponding path program 13 times [2019-10-14 21:40:25,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:25,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257333301] [2019-10-14 21:40:25,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:25,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:25,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:25,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257333301] [2019-10-14 21:40:25,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836496108] [2019-10-14 21:40:25,476 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 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 21:40:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:40:25,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:25,596 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:25,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:40:25,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556926600] [2019-10-14 21:40:25,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:40:25,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:25,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:40:25,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:40:25,598 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-14 21:40:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:25,713 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-14 21:40:25,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:40:25,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-14 21:40:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:25,715 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:40:25,715 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:40:25,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 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 21:40:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:40:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-14 21:40:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:40:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-14 21:40:25,720 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-14 21:40:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:25,720 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-14 21:40:25,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:40:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-14 21:40:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 21:40:25,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:25,722 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 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 21:40:25,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:25,923 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:25,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:25,923 INFO L82 PathProgramCache]: Analyzing trace with hash 440415299, now seen corresponding path program 14 times [2019-10-14 21:40:25,924 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:25,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186957347] [2019-10-14 21:40:25,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:25,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:25,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:26,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186957347] [2019-10-14 21:40:26,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859813598] [2019-10-14 21:40:26,165 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 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 21:40:26,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:26,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:26,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:40:26,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:26,334 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:26,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:40:26,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488246963] [2019-10-14 21:40:26,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:40:26,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:26,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:40:26,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:40:26,336 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-14 21:40:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:26,493 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-14 21:40:26,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:40:26,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-14 21:40:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:26,495 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:40:26,495 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:40:26,496 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 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 21:40:26,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:40:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 21:40:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:40:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-14 21:40:26,506 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-14 21:40:26,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:26,507 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-14 21:40:26,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:40:26,507 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-14 21:40:26,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 21:40:26,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:26,509 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 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 21:40:26,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:26,715 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:26,716 INFO L82 PathProgramCache]: Analyzing trace with hash -600571739, now seen corresponding path program 15 times [2019-10-14 21:40:26,716 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:26,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294562150] [2019-10-14 21:40:26,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:26,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:26,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:26,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294562150] [2019-10-14 21:40:26,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006302130] [2019-10-14 21:40:26,974 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 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 21:40:27,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:40:27,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:27,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:40:27,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-14 21:40:27,173 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:27,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 21:40:27,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033363220] [2019-10-14 21:40:27,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:40:27,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:27,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:40:27,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:27,175 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-14 21:40:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:27,397 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-14 21:40:27,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:40:27,397 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-14 21:40:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:27,398 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:40:27,398 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:40:27,399 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:40:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-14 21:40:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:40:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-14 21:40:27,404 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-14 21:40:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:27,404 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-14 21:40:27,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:40:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-14 21:40:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:40:27,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:27,405 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 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 21:40:27,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:27,610 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:27,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:27,610 INFO L82 PathProgramCache]: Analyzing trace with hash 25314053, now seen corresponding path program 16 times [2019-10-14 21:40:27,611 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:27,611 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335105897] [2019-10-14 21:40:27,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:27,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:27,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:40:27,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335105897] [2019-10-14 21:40:27,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282264931] [2019-10-14 21:40:27,886 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 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 21:40:27,971 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:27,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:27,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:40:27,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:40:28,004 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:28,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:40:28,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218520894] [2019-10-14 21:40:28,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:40:28,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:28,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:40:28,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:40:28,006 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-14 21:40:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:28,195 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-14 21:40:28,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:40:28,196 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-14 21:40:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:28,196 INFO L225 Difference]: With dead ends: 118 [2019-10-14 21:40:28,197 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:40:28,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 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 21:40:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:40:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 21:40:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:40:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-14 21:40:28,202 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-14 21:40:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:28,202 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-14 21:40:28,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:40:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-14 21:40:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 21:40:28,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:28,204 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 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 21:40:28,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:28,405 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:28,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash -124797465, now seen corresponding path program 17 times [2019-10-14 21:40:28,406 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:28,406 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54091410] [2019-10-14 21:40:28,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:28,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:28,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:40:28,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54091410] [2019-10-14 21:40:28,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321161313] [2019-10-14 21:40:28,702 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 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 21:40:29,830 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 21:40:29,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:29,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:40:29,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-14 21:40:29,946 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:29,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-14 21:40:29,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477824774] [2019-10-14 21:40:29,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:40:29,947 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:29,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:40:29,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:40:29,948 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-14 21:40:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:30,373 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-14 21:40:30,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:40:30,378 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-14 21:40:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:30,379 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:40:30,379 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:40:30,380 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:40:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:40:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-14 21:40:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 21:40:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-14 21:40:30,384 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-14 21:40:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:30,384 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-14 21:40:30,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:40:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-14 21:40:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 21:40:30,386 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:30,386 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 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 21:40:30,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:30,591 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:30,592 INFO L82 PathProgramCache]: Analyzing trace with hash 933335591, now seen corresponding path program 18 times [2019-10-14 21:40:30,592 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:30,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481353249] [2019-10-14 21:40:30,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:30,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:30,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-14 21:40:30,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481353249] [2019-10-14 21:40:30,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620439211] [2019-10-14 21:40:30,888 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 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 21:40:31,280 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:40:31,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:31,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:40:31,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-10-14 21:40:31,406 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:31,406 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-10-14 21:40:31,407 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738197113] [2019-10-14 21:40:31,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:40:31,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:31,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:40:31,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:40:31,408 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-10-14 21:40:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:31,689 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-10-14 21:40:31,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:40:31,692 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-10-14 21:40:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:31,693 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:40:31,693 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 21:40:31,694 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:40:31,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 21:40:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-10-14 21:40:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 21:40:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-14 21:40:31,699 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-10-14 21:40:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:31,699 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-14 21:40:31,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:40:31,699 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-14 21:40:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 21:40:31,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:31,700 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 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 21:40:31,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:31,906 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:31,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:31,906 INFO L82 PathProgramCache]: Analyzing trace with hash 34033799, now seen corresponding path program 19 times [2019-10-14 21:40:31,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:31,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505455354] [2019-10-14 21:40:31,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:31,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:31,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:32,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505455354] [2019-10-14 21:40:32,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969474562] [2019-10-14 21:40:32,212 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 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 21:40:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:40:32,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:32,316 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:32,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:40:32,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553549342] [2019-10-14 21:40:32,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:40:32,317 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:32,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:40:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:32,318 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-10-14 21:40:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:32,508 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-10-14 21:40:32,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:40:32,508 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-10-14 21:40:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:32,509 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:40:32,509 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:40:32,510 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 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 21:40:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:40:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-14 21:40:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 21:40:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-14 21:40:32,516 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-10-14 21:40:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:32,516 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-14 21:40:32,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:40:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-14 21:40:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:40:32,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:32,518 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 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 21:40:32,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:32,724 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:32,725 INFO L82 PathProgramCache]: Analyzing trace with hash 44767209, now seen corresponding path program 20 times [2019-10-14 21:40:32,725 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:32,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333942199] [2019-10-14 21:40:32,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:32,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:32,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:33,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333942199] [2019-10-14 21:40:33,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538876943] [2019-10-14 21:40:33,020 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 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 21:40:33,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:33,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:33,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:40:33,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:33,153 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:33,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:40:33,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893459217] [2019-10-14 21:40:33,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:40:33,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:33,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:40:33,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:40:33,155 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-10-14 21:40:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:33,373 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-14 21:40:33,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:40:33,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-14 21:40:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:33,375 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:40:33,376 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:40:33,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:40:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:40:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-14 21:40:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:40:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-14 21:40:33,382 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-14 21:40:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:33,382 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-14 21:40:33,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:40:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-14 21:40:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 21:40:33,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:33,384 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 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 21:40:33,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:33,591 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:33,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:33,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1769639627, now seen corresponding path program 21 times [2019-10-14 21:40:33,592 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:33,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148907358] [2019-10-14 21:40:33,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:33,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:33,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:33,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148907358] [2019-10-14 21:40:33,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670325917] [2019-10-14 21:40:33,984 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 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 21:40:34,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:40:34,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:34,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:40:34,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-10-14 21:40:34,294 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:34,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-10-14 21:40:34,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116682700] [2019-10-14 21:40:34,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:40:34,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:34,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:40:34,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:40:34,297 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-10-14 21:40:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:34,637 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-10-14 21:40:34,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:40:34,637 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-10-14 21:40:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:34,638 INFO L225 Difference]: With dead ends: 139 [2019-10-14 21:40:34,638 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 21:40:34,639 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:40:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 21:40:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 21:40:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:40:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-10-14 21:40:34,643 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-10-14 21:40:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:34,643 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-10-14 21:40:34,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:40:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-10-14 21:40:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 21:40:34,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:34,644 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 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 21:40:34,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:34,849 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:34,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1205252651, now seen corresponding path program 22 times [2019-10-14 21:40:34,850 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:34,850 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851114899] [2019-10-14 21:40:34,850 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:34,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:34,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:40:35,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851114899] [2019-10-14 21:40:35,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813659656] [2019-10-14 21:40:35,369 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 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 21:40:35,469 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:35,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:35,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:40:35,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:40:35,502 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:35,503 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:40:35,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950386704] [2019-10-14 21:40:35,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:40:35,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:35,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:40:35,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:40:35,504 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-10-14 21:40:35,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:35,746 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-10-14 21:40:35,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:40:35,746 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-10-14 21:40:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:35,747 INFO L225 Difference]: With dead ends: 142 [2019-10-14 21:40:35,747 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 21:40:35,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:40:35,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 21:40:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 21:40:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 21:40:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-14 21:40:35,752 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-10-14 21:40:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:35,753 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-14 21:40:35,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:40:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-14 21:40:35,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 21:40:35,754 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:35,754 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 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 21:40:35,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:35,958 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash -369756275, now seen corresponding path program 23 times [2019-10-14 21:40:35,959 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:35,959 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952622911] [2019-10-14 21:40:35,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:35,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:35,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:40:36,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952622911] [2019-10-14 21:40:36,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074159773] [2019-10-14 21:40:36,353 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 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 21:40:44,428 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-14 21:40:44,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:44,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:40:44,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-10-14 21:40:44,651 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:44,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-10-14 21:40:44,652 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752352968] [2019-10-14 21:40:44,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:40:44,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:44,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:40:44,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:40:44,653 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-10-14 21:40:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:45,128 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-10-14 21:40:45,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:40:45,129 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-10-14 21:40:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:45,130 INFO L225 Difference]: With dead ends: 147 [2019-10-14 21:40:45,130 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 21:40:45,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:40:45,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 21:40:45,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-10-14 21:40:45,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 21:40:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-10-14 21:40:45,135 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-10-14 21:40:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:45,135 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-10-14 21:40:45,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:40:45,135 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-10-14 21:40:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 21:40:45,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:45,136 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 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 21:40:45,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:45,337 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:45,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:45,338 INFO L82 PathProgramCache]: Analyzing trace with hash 585301965, now seen corresponding path program 24 times [2019-10-14 21:40:45,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:45,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591554107] [2019-10-14 21:40:45,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:45,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:45,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-10-14 21:40:45,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591554107] [2019-10-14 21:40:45,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024858988] [2019-10-14 21:40:45,940 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 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 21:40:47,379 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 21:40:47,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:47,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:40:47,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-10-14 21:40:47,549 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:47,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-10-14 21:40:47,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066663795] [2019-10-14 21:40:47,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:40:47,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:47,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:40:47,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:40:47,551 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-10-14 21:40:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:47,886 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-10-14 21:40:47,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:40:47,886 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-10-14 21:40:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:47,887 INFO L225 Difference]: With dead ends: 153 [2019-10-14 21:40:47,887 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:40:47,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:40:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:40:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-10-14 21:40:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 21:40:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-10-14 21:40:47,894 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-10-14 21:40:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:47,894 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-10-14 21:40:47,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:40:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-10-14 21:40:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 21:40:47,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:47,897 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 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 21:40:48,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:48,103 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1800822573, now seen corresponding path program 25 times [2019-10-14 21:40:48,104 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:48,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986628949] [2019-10-14 21:40:48,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:48,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:48,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:48,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986628949] [2019-10-14 21:40:48,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124209949] [2019-10-14 21:40:48,475 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 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 21:40:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:48,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:40:48,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:48,635 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:48,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:40:48,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373836087] [2019-10-14 21:40:48,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:40:48,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:48,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:40:48,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:40:48,636 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-10-14 21:40:48,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:48,884 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-10-14 21:40:48,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:40:48,885 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-10-14 21:40:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:48,886 INFO L225 Difference]: With dead ends: 156 [2019-10-14 21:40:48,886 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 21:40:48,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:40:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 21:40:48,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-14 21:40:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 21:40:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-14 21:40:48,892 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-10-14 21:40:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:48,893 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-14 21:40:48,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:40:48,893 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-14 21:40:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 21:40:48,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:48,894 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 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 21:40:49,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:49,098 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:49,098 INFO L82 PathProgramCache]: Analyzing trace with hash -187199217, now seen corresponding path program 26 times [2019-10-14 21:40:49,099 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:49,099 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960057617] [2019-10-14 21:40:49,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:49,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:49,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:49,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960057617] [2019-10-14 21:40:49,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241164467] [2019-10-14 21:40:49,731 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 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 21:40:49,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:49,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:49,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:40:49,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:49,883 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:49,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:40:49,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60841607] [2019-10-14 21:40:49,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:40:49,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:40:49,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:40:49,885 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-10-14 21:40:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:50,041 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-10-14 21:40:50,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:40:50,042 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-10-14 21:40:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:50,043 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:40:50,044 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 21:40:50,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:40:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 21:40:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-14 21:40:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 21:40:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-14 21:40:50,050 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-10-14 21:40:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:50,050 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-14 21:40:50,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:40:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-14 21:40:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-14 21:40:50,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:50,052 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 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 21:40:50,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:50,256 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash 584307313, now seen corresponding path program 27 times [2019-10-14 21:40:50,257 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:50,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721629063] [2019-10-14 21:40:50,257 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:50,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:50,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:50,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721629063] [2019-10-14 21:40:50,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011622907] [2019-10-14 21:40:50,911 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 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 [2019-10-14 21:40:51,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:40:51,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:51,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:40:51,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-10-14 21:40:51,259 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:51,259 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-10-14 21:40:51,259 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177352739] [2019-10-14 21:40:51,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 21:40:51,260 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:51,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 21:40:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:40:51,261 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-10-14 21:40:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:51,809 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-10-14 21:40:51,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:40:51,810 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-10-14 21:40:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:51,811 INFO L225 Difference]: With dead ends: 163 [2019-10-14 21:40:51,812 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 21:40:51,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-10-14 21:40:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 21:40:51,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-10-14 21:40:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-14 21:40:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-10-14 21:40:51,819 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-10-14 21:40:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:51,819 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-10-14 21:40:51,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 21:40:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-10-14 21:40:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-14 21:40:51,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:51,821 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 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 21:40:52,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:52,025 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:52,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:52,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1229503153, now seen corresponding path program 28 times [2019-10-14 21:40:52,026 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:52,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927241416] [2019-10-14 21:40:52,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:52,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:52,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-10-14 21:40:52,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927241416] [2019-10-14 21:40:52,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640821254] [2019-10-14 21:40:52,490 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:52,620 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:52,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:52,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:40:52,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-10-14 21:40:52,793 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:52,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-10-14 21:40:52,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979868447] [2019-10-14 21:40:52,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 21:40:52,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:52,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 21:40:52,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:40:52,795 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-10-14 21:40:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:53,266 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-10-14 21:40:53,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 21:40:53,266 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-10-14 21:40:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:53,267 INFO L225 Difference]: With dead ends: 169 [2019-10-14 21:40:53,268 INFO L226 Difference]: Without dead ends: 119 [2019-10-14 21:40:53,270 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-10-14 21:40:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-14 21:40:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-10-14 21:40:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 21:40:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-10-14 21:40:53,275 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-10-14 21:40:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:53,275 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-10-14 21:40:53,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 21:40:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-10-14 21:40:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 21:40:53,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:53,277 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 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 21:40:53,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:53,481 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash -46911247, now seen corresponding path program 29 times [2019-10-14 21:40:53,482 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:53,483 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848623586] [2019-10-14 21:40:53,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:53,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:53,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-14 21:40:53,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848623586] [2019-10-14 21:40:53,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906957986] [2019-10-14 21:40:53,952 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true