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/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:13:58,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:13:58,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:13:58,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:13:58,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:13:58,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:13:58,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:13:58,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:13:58,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:13:58,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:13:58,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:13:58,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:13:58,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:13:58,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:13:58,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:13:58,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:13:58,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:13:58,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:13:58,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:13:58,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:13:58,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:13:58,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:13:58,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:13:58,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:13:58,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:13:58,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:13:58,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:13:58,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:13:58,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:13:58,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:13:58,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:13:58,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:13:58,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:13:58,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:13:58,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:13:58,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:13:58,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:13:58,545 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:13:58,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:13:58,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:13:58,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:13:58,548 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:13:58,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:13:58,548 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:13:58,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:13:58,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:13:58,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:13:58,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:13:58,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:13:58,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:13:58,551 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:13:58,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:13:58,552 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:13:58,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:13:58,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:13:58,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:13:58,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:13:58,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:13:58,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:13:58,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:13:58,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:13:58,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:13:58,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:13:58,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:13:58,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:13:58,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:13:58,873 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:13:58,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:13:58,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:13:58,891 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:13:58,892 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:13:58,893 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2019-10-14 23:13:58,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93d3369b2/845f003d86844f2bb3e912748c66a612/FLAG8c67e4888 [2019-10-14 23:13:59,417 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:13:59,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2019-10-14 23:13:59,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93d3369b2/845f003d86844f2bb3e912748c66a612/FLAG8c67e4888 [2019-10-14 23:13:59,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93d3369b2/845f003d86844f2bb3e912748c66a612 [2019-10-14 23:13:59,819 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:13:59,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:13:59,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:13:59,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:13:59,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:13:59,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:13:59" (1/1) ... [2019-10-14 23:13:59,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8f9260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:13:59, skipping insertion in model container [2019-10-14 23:13:59,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:13:59" (1/1) ... [2019-10-14 23:13:59,838 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:13:59,858 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:14:00,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:00,075 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:14:00,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:00,113 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:14:00,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:00 WrapperNode [2019-10-14 23:14:00,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:00,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:14:00,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:14:00,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:14:00,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:00" (1/1) ... [2019-10-14 23:14:00,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:00" (1/1) ... [2019-10-14 23:14:00,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:00" (1/1) ... [2019-10-14 23:14:00,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:00" (1/1) ... [2019-10-14 23:14:00,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:00" (1/1) ... [2019-10-14 23:14:00,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:00" (1/1) ... [2019-10-14 23:14:00,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:00" (1/1) ... [2019-10-14 23:14:00,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:14:00,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:14:00,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:14:00,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:14:00,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:14:00,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:14:00,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:14:00,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:14:00,306 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:14:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:14:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:14:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:14:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:14:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:14:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:14:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:14:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:14:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:14:00,529 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:14:00,530 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:14:00,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:00 BoogieIcfgContainer [2019-10-14 23:14:00,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:14:00,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:14:00,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:14:00,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:14:00,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:13:59" (1/3) ... [2019-10-14 23:14:00,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61722582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:00, skipping insertion in model container [2019-10-14 23:14:00,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:00" (2/3) ... [2019-10-14 23:14:00,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61722582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:00, skipping insertion in model container [2019-10-14 23:14:00,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:00" (3/3) ... [2019-10-14 23:14:00,540 INFO L109 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2019-10-14 23:14:00,554 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:14:00,564 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:14:00,577 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:14:00,620 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:14:00,621 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:14:00,621 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:14:00,621 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:14:00,621 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:14:00,621 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:14:00,622 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:14:00,622 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:14:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-14 23:14:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:14:00,657 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:00,658 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:00,660 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:00,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:00,668 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2019-10-14 23:14:00,678 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:00,679 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844339779] [2019-10-14 23:14:00,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:00,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:00,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:00,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844339779] [2019-10-14 23:14:00,890 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:00,890 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:14:00,891 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245402898] [2019-10-14 23:14:00,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:14:00,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:00,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:14:00,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:14:00,917 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-10-14 23:14:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:00,986 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-10-14 23:14:00,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:14:00,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-14 23:14:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:00,999 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:14:01,000 INFO L226 Difference]: Without dead ends: 14 [2019-10-14 23:14:01,004 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 23:14:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-14 23:14:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-14 23:14:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-14 23:14:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-14 23:14:01,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-14 23:14:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:01,053 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-14 23:14:01,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:14:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-14 23:14:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:14:01,055 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:01,055 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:01,056 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:01,056 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2019-10-14 23:14:01,057 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:01,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706157667] [2019-10-14 23:14:01,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:01,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:01,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:01,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706157667] [2019-10-14 23:14:01,196 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:01,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:14:01,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499453713] [2019-10-14 23:14:01,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:14:01,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:01,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:14:01,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:01,200 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2019-10-14 23:14:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:01,258 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-14 23:14:01,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:14:01,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-14 23:14:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:01,260 INFO L225 Difference]: With dead ends: 22 [2019-10-14 23:14:01,261 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:14:01,262 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:14:01,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-14 23:14:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:14:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-14 23:14:01,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-10-14 23:14:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:01,270 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-14 23:14:01,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:14:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-14 23:14:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:14:01,273 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:01,273 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:01,273 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2019-10-14 23:14:01,275 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:01,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778520933] [2019-10-14 23:14:01,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:01,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:01,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:01,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778520933] [2019-10-14 23:14:01,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517880916] [2019-10-14 23:14:01,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:01,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:14:01,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:01,530 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:01,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:14:01,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140396528] [2019-10-14 23:14:01,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:14:01,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:01,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:14:01,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:14:01,542 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2019-10-14 23:14:01,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:01,590 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-14 23:14:01,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:14:01,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-10-14 23:14:01,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:01,591 INFO L225 Difference]: With dead ends: 24 [2019-10-14 23:14:01,591 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 23:14:01,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:14:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 23:14:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-10-14 23:14:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:14:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-14 23:14:01,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-10-14 23:14:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:01,597 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-14 23:14:01,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:14:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-14 23:14:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:14:01,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:01,599 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:01,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:01,804 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:01,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:01,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2019-10-14 23:14:01,805 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:01,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313921668] [2019-10-14 23:14:01,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:01,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:01,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:01,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313921668] [2019-10-14 23:14:01,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041714310] [2019-10-14 23:14:01,876 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:01,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:01,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:01,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:14:01,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:01,942 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:01,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:14:01,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948328292] [2019-10-14 23:14:01,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:14:01,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:01,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:14:01,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:14:01,945 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2019-10-14 23:14:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:01,996 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-14 23:14:01,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:14:01,996 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-10-14 23:14:01,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:01,997 INFO L225 Difference]: With dead ends: 26 [2019-10-14 23:14:01,998 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 23:14:01,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:14:01,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 23:14:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-10-14 23:14:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 23:14:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-14 23:14:02,004 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2019-10-14 23:14:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:02,004 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-14 23:14:02,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:14:02,005 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-14 23:14:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:14:02,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:02,006 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:02,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:02,217 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:02,218 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2019-10-14 23:14:02,219 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:02,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019677634] [2019-10-14 23:14:02,219 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:02,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:02,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:02,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019677634] [2019-10-14 23:14:02,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286132177] [2019-10-14 23:14:02,309 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:02,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:14:02,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:02,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:14:02,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:02,391 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:02,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 23:14:02,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035801018] [2019-10-14 23:14:02,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:14:02,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:02,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:14:02,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:14:02,393 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2019-10-14 23:14:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:02,455 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-14 23:14:02,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:14:02,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-10-14 23:14:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:02,457 INFO L225 Difference]: With dead ends: 28 [2019-10-14 23:14:02,457 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:14:02,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:14:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:14:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-10-14 23:14:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:14:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-14 23:14:02,466 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2019-10-14 23:14:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:02,467 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-14 23:14:02,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:14:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-14 23:14:02,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:14:02,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:02,468 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:02,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:02,676 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:02,676 INFO L82 PathProgramCache]: Analyzing trace with hash 815274917, now seen corresponding path program 4 times [2019-10-14 23:14:02,677 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:02,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410974844] [2019-10-14 23:14:02,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:02,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:02,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:02,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410974844] [2019-10-14 23:14:02,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121507378] [2019-10-14 23:14:02,754 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:02,794 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:02,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:02,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:14:02,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:02,813 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:02,813 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:14:02,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726143030] [2019-10-14 23:14:02,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:14:02,817 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:02,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:14:02,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:02,817 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 9 states. [2019-10-14 23:14:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:02,868 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-14 23:14:02,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:14:02,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-10-14 23:14:02,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:02,870 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:14:02,870 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:14:02,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:14:02,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-14 23:14:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:14:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-14 23:14:02,876 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2019-10-14 23:14:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:02,876 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-14 23:14:02,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:14:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-14 23:14:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:14:02,877 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:02,877 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:03,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:03,084 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash 954425671, now seen corresponding path program 5 times [2019-10-14 23:14:03,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:03,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414613845] [2019-10-14 23:14:03,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:03,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:03,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:03,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414613845] [2019-10-14 23:14:03,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62136405] [2019-10-14 23:14:03,175 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:03,247 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:14:03,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:03,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:14:03,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:03,284 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:03,285 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 23:14:03,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822150684] [2019-10-14 23:14:03,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:14:03,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:03,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:14:03,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:03,287 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 10 states. [2019-10-14 23:14:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:03,364 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-14 23:14:03,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:14:03,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-10-14 23:14:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:03,365 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:14:03,366 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:14:03,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:14:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-10-14 23:14:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:14:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-14 23:14:03,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2019-10-14 23:14:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:03,375 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-14 23:14:03,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:14:03,377 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-14 23:14:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:14:03,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:03,377 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:03,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:03,582 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1534314089, now seen corresponding path program 6 times [2019-10-14 23:14:03,582 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:03,582 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159167973] [2019-10-14 23:14:03,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:03,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:03,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:03,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159167973] [2019-10-14 23:14:03,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908185460] [2019-10-14 23:14:03,706 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:03,767 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:14:03,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:03,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:14:03,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:03,788 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:03,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 23:14:03,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704871865] [2019-10-14 23:14:03,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:14:03,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:03,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:14:03,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:14:03,790 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 11 states. [2019-10-14 23:14:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:03,890 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-14 23:14:03,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:14:03,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-10-14 23:14:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:03,891 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:14:03,891 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:14:03,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:14:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:14:03,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 23:14:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:14:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-14 23:14:03,897 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2019-10-14 23:14:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:03,898 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-14 23:14:03,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:14:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-14 23:14:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:14:03,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:03,899 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:04,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:04,103 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash 461335307, now seen corresponding path program 7 times [2019-10-14 23:14:04,103 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:04,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708016852] [2019-10-14 23:14:04,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:04,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:04,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:04,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708016852] [2019-10-14 23:14:04,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467458135] [2019-10-14 23:14:04,238 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:14:04,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:04,313 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:04,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:14:04,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141158027] [2019-10-14 23:14:04,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:14:04,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:14:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:14:04,315 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2019-10-14 23:14:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:04,398 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-14 23:14:04,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:14:04,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2019-10-14 23:14:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:04,400 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:14:04,400 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:14:04,400 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:14:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:14:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:14:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:14:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-14 23:14:04,405 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2019-10-14 23:14:04,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:04,405 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-14 23:14:04,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:14:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-14 23:14:04,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:14:04,407 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:04,407 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:04,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:04,615 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash 120876845, now seen corresponding path program 8 times [2019-10-14 23:14:04,615 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:04,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457434393] [2019-10-14 23:14:04,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:04,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:04,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:04,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457434393] [2019-10-14 23:14:04,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895458642] [2019-10-14 23:14:04,741 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:04,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:04,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:04,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:14:04,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:04,815 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:04,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:14:04,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499300577] [2019-10-14 23:14:04,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:14:04,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:04,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:14:04,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:14:04,817 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 13 states. [2019-10-14 23:14:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:04,891 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-10-14 23:14:04,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:14:04,892 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-10-14 23:14:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:04,893 INFO L225 Difference]: With dead ends: 38 [2019-10-14 23:14:04,893 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:14:04,894 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:14:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:14:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-14 23:14:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:14:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-14 23:14:04,898 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2019-10-14 23:14:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:04,899 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-14 23:14:04,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:14:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-14 23:14:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:14:04,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:04,900 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:05,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:05,110 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:05,111 INFO L82 PathProgramCache]: Analyzing trace with hash -642190641, now seen corresponding path program 9 times [2019-10-14 23:14:05,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:05,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448349560] [2019-10-14 23:14:05,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:05,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:05,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:05,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448349560] [2019-10-14 23:14:05,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615211069] [2019-10-14 23:14:05,246 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:05,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 23:14:05,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:05,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:14:05,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:05,380 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:05,381 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 23:14:05,381 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917893563] [2019-10-14 23:14:05,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:14:05,386 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:14:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:14:05,387 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 14 states. [2019-10-14 23:14:05,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:05,486 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-10-14 23:14:05,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:14:05,487 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2019-10-14 23:14:05,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:05,488 INFO L225 Difference]: With dead ends: 40 [2019-10-14 23:14:05,488 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:14:05,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:14:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:14:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 23:14:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:14:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-14 23:14:05,493 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2019-10-14 23:14:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:05,494 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-14 23:14:05,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:14:05,494 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-14 23:14:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:14:05,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:05,495 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:05,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:05,701 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 489362929, now seen corresponding path program 10 times [2019-10-14 23:14:05,701 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:05,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8677362] [2019-10-14 23:14:05,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:05,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:05,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:05,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8677362] [2019-10-14 23:14:05,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607156167] [2019-10-14 23:14:05,842 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:05,885 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:05,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:05,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:14:05,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:05,930 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:05,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 23:14:05,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291758325] [2019-10-14 23:14:05,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:14:05,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:14:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:14:05,935 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 15 states. [2019-10-14 23:14:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:06,032 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-14 23:14:06,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:14:06,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2019-10-14 23:14:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:06,034 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:14:06,034 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:14:06,034 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:14:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:14:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 23:14:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:14:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-14 23:14:06,039 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2019-10-14 23:14:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:06,039 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-14 23:14:06,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:14:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-14 23:14:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:14:06,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:06,040 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:06,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:06,245 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:06,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1285617811, now seen corresponding path program 11 times [2019-10-14 23:14:06,246 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:06,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561072171] [2019-10-14 23:14:06,247 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:06,247 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:06,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:06,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561072171] [2019-10-14 23:14:06,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144415797] [2019-10-14 23:14:06,405 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:06,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 23:14:06,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:06,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:14:06,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:06,621 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:06,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 23:14:06,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850502308] [2019-10-14 23:14:06,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:14:06,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:06,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:14:06,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:14:06,623 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 16 states. [2019-10-14 23:14:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:06,739 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-10-14 23:14:06,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:14:06,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2019-10-14 23:14:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:06,740 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:14:06,740 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:14:06,741 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:14:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:14:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-10-14 23:14:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:14:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-10-14 23:14:06,745 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2019-10-14 23:14:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:06,745 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-10-14 23:14:06,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:14:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-10-14 23:14:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:14:06,747 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:06,747 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:06,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:06,948 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:06,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1982380725, now seen corresponding path program 12 times [2019-10-14 23:14:06,949 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:06,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025027480] [2019-10-14 23:14:06,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:06,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:06,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:07,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025027480] [2019-10-14 23:14:07,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039778541] [2019-10-14 23:14:07,316 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:07,595 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:14:07,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:07,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:14:07,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:07,644 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:07,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-10-14 23:14:07,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95974129] [2019-10-14 23:14:07,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:14:07,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:07,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:14:07,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:14:07,646 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 17 states. [2019-10-14 23:14:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:07,746 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-10-14 23:14:07,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:14:07,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2019-10-14 23:14:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:07,748 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:14:07,748 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:14:07,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:14:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:14:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-14 23:14:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:14:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-10-14 23:14:07,755 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2019-10-14 23:14:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:07,755 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-10-14 23:14:07,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:14:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-10-14 23:14:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 23:14:07,756 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:07,756 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:07,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:07,960 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:07,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1556642903, now seen corresponding path program 13 times [2019-10-14 23:14:07,961 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:07,962 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457087007] [2019-10-14 23:14:07,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:07,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:07,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:08,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457087007] [2019-10-14 23:14:08,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256050729] [2019-10-14 23:14:08,117 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:08,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:14:08,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:08,191 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:08,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 23:14:08,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512135540] [2019-10-14 23:14:08,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:14:08,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:08,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:14:08,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:14:08,193 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 18 states. [2019-10-14 23:14:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:08,272 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-14 23:14:08,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:14:08,273 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2019-10-14 23:14:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:08,274 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:14:08,274 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:14:08,275 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:14:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:14:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 23:14:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:14:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-10-14 23:14:08,283 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2019-10-14 23:14:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:08,283 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-10-14 23:14:08,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:14:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-10-14 23:14:08,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 23:14:08,286 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:08,286 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:08,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:08,488 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:08,488 INFO L82 PathProgramCache]: Analyzing trace with hash 444489081, now seen corresponding path program 14 times [2019-10-14 23:14:08,488 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:08,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800188113] [2019-10-14 23:14:08,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:08,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:08,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:08,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800188113] [2019-10-14 23:14:08,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844534890] [2019-10-14 23:14:08,685 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:08,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:08,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:08,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:14:08,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:08,757 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:08,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 23:14:08,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459014088] [2019-10-14 23:14:08,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:14:08,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:14:08,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:14:08,758 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 19 states. [2019-10-14 23:14:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:08,889 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-10-14 23:14:08,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:14:08,890 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2019-10-14 23:14:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:08,891 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:14:08,891 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:14:08,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:14:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:14:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-14 23:14:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:14:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-10-14 23:14:08,898 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2019-10-14 23:14:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:08,898 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-10-14 23:14:08,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:14:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-10-14 23:14:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:14:08,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:08,900 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:09,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:09,104 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:09,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1111522843, now seen corresponding path program 15 times [2019-10-14 23:14:09,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:09,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070097172] [2019-10-14 23:14:09,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:09,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:09,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:09,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070097172] [2019-10-14 23:14:09,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501737183] [2019-10-14 23:14:09,310 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:09,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-14 23:14:09,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:09,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:14:09,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:09,670 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:09,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-14 23:14:09,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845681141] [2019-10-14 23:14:09,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:14:09,671 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:14:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:14:09,672 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 20 states. [2019-10-14 23:14:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:09,779 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-10-14 23:14:09,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:14:09,780 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2019-10-14 23:14:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:09,782 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:14:09,782 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:14:09,783 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:14:09,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:14:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-10-14 23:14:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:14:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-10-14 23:14:09,791 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2019-10-14 23:14:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:09,792 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-10-14 23:14:09,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:14:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-10-14 23:14:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 23:14:09,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:09,793 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:09,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:09,994 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:09,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2114126275, now seen corresponding path program 16 times [2019-10-14 23:14:09,995 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:09,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811021623] [2019-10-14 23:14:09,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:09,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:09,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:10,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811021623] [2019-10-14 23:14:10,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748202084] [2019-10-14 23:14:10,218 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:10,301 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:10,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:10,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:14:10,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:10,340 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:10,340 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 23:14:10,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164642] [2019-10-14 23:14:10,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:14:10,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:10,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:14:10,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:14:10,345 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 21 states. [2019-10-14 23:14:10,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:10,471 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-10-14 23:14:10,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:14:10,472 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2019-10-14 23:14:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:10,473 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:14:10,473 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:14:10,474 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:14:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:14:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-10-14 23:14:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:14:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-10-14 23:14:10,489 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2019-10-14 23:14:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:10,489 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-10-14 23:14:10,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:14:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-10-14 23:14:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:14:10,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:10,492 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:10,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:10,700 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:10,700 INFO L82 PathProgramCache]: Analyzing trace with hash -996540961, now seen corresponding path program 17 times [2019-10-14 23:14:10,701 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:10,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911203519] [2019-10-14 23:14:10,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:10,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:10,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:10,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911203519] [2019-10-14 23:14:10,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853198662] [2019-10-14 23:14:10,950 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:11,106 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 23:14:11,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:11,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:14:11,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:11,129 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:11,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 23:14:11,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836807550] [2019-10-14 23:14:11,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:14:11,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:11,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:14:11,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:14:11,131 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 22 states. [2019-10-14 23:14:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:11,246 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-10-14 23:14:11,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:14:11,247 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2019-10-14 23:14:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:11,247 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:14:11,248 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:14:11,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:14:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:14:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-14 23:14:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:14:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-14 23:14:11,253 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2019-10-14 23:14:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:11,253 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-14 23:14:11,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:14:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-14 23:14:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:14:11,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:11,255 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:11,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:11,461 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:11,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:11,461 INFO L82 PathProgramCache]: Analyzing trace with hash -738878207, now seen corresponding path program 18 times [2019-10-14 23:14:11,461 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:11,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972413533] [2019-10-14 23:14:11,462 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:11,462 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:11,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:11,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972413533] [2019-10-14 23:14:11,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377665437] [2019-10-14 23:14:11,683 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:12,317 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 23:14:12,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:12,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 23:14:12,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:12,349 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:12,349 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-14 23:14:12,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912581583] [2019-10-14 23:14:12,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:14:12,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:12,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:14:12,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:14:12,351 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 23 states. [2019-10-14 23:14:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:12,480 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-10-14 23:14:12,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:14:12,480 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-10-14 23:14:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:12,481 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:14:12,481 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:14:12,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:14:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:14:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 23:14:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:14:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-10-14 23:14:12,485 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2019-10-14 23:14:12,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:12,486 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-10-14 23:14:12,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:14:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-10-14 23:14:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:14:12,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:12,487 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:12,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:12,692 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:12,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:12,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2061892515, now seen corresponding path program 19 times [2019-10-14 23:14:12,692 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:12,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914559021] [2019-10-14 23:14:12,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:12,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:12,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:12,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914559021] [2019-10-14 23:14:12,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206095617] [2019-10-14 23:14:12,953 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:13,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:14:13,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:13,029 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:13,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 23:14:13,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711798311] [2019-10-14 23:14:13,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:14:13,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:13,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:14:13,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:14:13,031 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 24 states. [2019-10-14 23:14:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:13,121 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-10-14 23:14:13,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:14:13,121 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2019-10-14 23:14:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:13,122 INFO L225 Difference]: With dead ends: 60 [2019-10-14 23:14:13,122 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 23:14:13,123 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:14:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 23:14:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 23:14:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:14:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-10-14 23:14:13,127 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2019-10-14 23:14:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:13,127 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-10-14 23:14:13,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:14:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-10-14 23:14:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:14:13,128 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:13,128 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:13,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:13,332 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash 658061765, now seen corresponding path program 20 times [2019-10-14 23:14:13,333 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:13,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618100313] [2019-10-14 23:14:13,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:13,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:13,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:13,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618100313] [2019-10-14 23:14:13,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808130692] [2019-10-14 23:14:13,576 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:13,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:13,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:13,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 23:14:13,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:13,661 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:13,661 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 23:14:13,661 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266715713] [2019-10-14 23:14:13,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:14:13,662 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:13,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:14:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:14:13,662 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 25 states. [2019-10-14 23:14:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:13,776 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-10-14 23:14:13,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:14:13,779 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2019-10-14 23:14:13,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:13,780 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:14:13,780 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 23:14:13,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 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 23:14:13,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 23:14:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-10-14 23:14:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 23:14:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-10-14 23:14:13,786 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2019-10-14 23:14:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:13,786 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-10-14 23:14:13,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:14:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-10-14 23:14:13,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 23:14:13,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:13,787 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:13,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:13,996 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash 196441959, now seen corresponding path program 21 times [2019-10-14 23:14:13,997 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:13,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548281398] [2019-10-14 23:14:13,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:13,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:13,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:14,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548281398] [2019-10-14 23:14:14,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503711610] [2019-10-14 23:14:14,309 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:15,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-14 23:14:15,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:15,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:14:15,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:15,678 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:15,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-14 23:14:15,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72110574] [2019-10-14 23:14:15,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:14:15,679 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:14:15,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:14:15,680 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 26 states. [2019-10-14 23:14:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:15,782 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-10-14 23:14:15,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:14:15,782 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2019-10-14 23:14:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:15,783 INFO L225 Difference]: With dead ends: 64 [2019-10-14 23:14:15,783 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 23:14:15,784 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:14:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 23:14:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 23:14:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:14:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-10-14 23:14:15,788 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2019-10-14 23:14:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:15,788 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-10-14 23:14:15,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 23:14:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-10-14 23:14:15,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:14:15,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:15,789 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:15,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:15,995 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:15,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1038560119, now seen corresponding path program 22 times [2019-10-14 23:14:15,995 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:15,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358321982] [2019-10-14 23:14:15,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:15,996 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:15,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:16,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358321982] [2019-10-14 23:14:16,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536673923] [2019-10-14 23:14:16,293 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:16,360 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:16,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:16,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:14:16,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:16,394 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:16,394 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 23:14:16,394 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528799229] [2019-10-14 23:14:16,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:14:16,395 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:16,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:14:16,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:14:16,396 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 27 states. [2019-10-14 23:14:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:16,540 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-10-14 23:14:16,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:14:16,541 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2019-10-14 23:14:16,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:16,542 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:14:16,551 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 23:14:16,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:14:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 23:14:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-14 23:14:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 23:14:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-10-14 23:14:16,555 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2019-10-14 23:14:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:16,555 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-10-14 23:14:16,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:14:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-10-14 23:14:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 23:14:16,556 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:16,556 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:16,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:16,760 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1830383915, now seen corresponding path program 23 times [2019-10-14 23:14:16,760 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:16,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436986737] [2019-10-14 23:14:16,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:16,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:16,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:17,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436986737] [2019-10-14 23:14:17,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526826136] [2019-10-14 23:14:17,118 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:17,553 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-14 23:14:17,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:17,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 23:14:17,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:17,578 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:17,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 23:14:17,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403636386] [2019-10-14 23:14:17,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:14:17,578 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:17,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:14:17,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:14:17,579 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 28 states. [2019-10-14 23:14:17,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:17,763 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-10-14 23:14:17,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:14:17,763 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2019-10-14 23:14:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:17,764 INFO L225 Difference]: With dead ends: 68 [2019-10-14 23:14:17,764 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:14:17,765 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:14:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:14:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-14 23:14:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:14:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-10-14 23:14:17,770 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2019-10-14 23:14:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:17,770 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-10-14 23:14:17,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:14:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-10-14 23:14:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 23:14:17,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:17,772 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:17,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:17,977 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1516596557, now seen corresponding path program 24 times [2019-10-14 23:14:17,977 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:17,978 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548893139] [2019-10-14 23:14:17,978 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:17,978 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:17,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:18,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548893139] [2019-10-14 23:14:18,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854927549] [2019-10-14 23:14:18,334 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:19,838 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-14 23:14:19,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:19,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 23:14:19,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:19,859 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:19,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-10-14 23:14:19,859 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138114020] [2019-10-14 23:14:19,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 23:14:19,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:19,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 23:14:19,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:14:19,861 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 29 states. [2019-10-14 23:14:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:20,025 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-10-14 23:14:20,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:14:20,026 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2019-10-14 23:14:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:20,027 INFO L225 Difference]: With dead ends: 70 [2019-10-14 23:14:20,027 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 23:14:20,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:14:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 23:14:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-10-14 23:14:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 23:14:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-10-14 23:14:20,031 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2019-10-14 23:14:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:20,032 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-10-14 23:14:20,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 23:14:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-10-14 23:14:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 23:14:20,033 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:20,033 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:20,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:20,238 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:20,238 INFO L82 PathProgramCache]: Analyzing trace with hash 614656239, now seen corresponding path program 25 times [2019-10-14 23:14:20,239 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:20,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914267280] [2019-10-14 23:14:20,239 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:20,239 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:20,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:20,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914267280] [2019-10-14 23:14:20,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18656319] [2019-10-14 23:14:20,557 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:20,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:14:20,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:20,643 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:20,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 23:14:20,643 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789800218] [2019-10-14 23:14:20,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:14:20,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:20,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:14:20,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:14:20,644 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 30 states. [2019-10-14 23:14:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:20,809 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-10-14 23:14:20,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 23:14:20,810 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 62 [2019-10-14 23:14:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:20,811 INFO L225 Difference]: With dead ends: 72 [2019-10-14 23:14:20,811 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 23:14:20,812 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:14:20,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 23:14:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-10-14 23:14:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 23:14:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-10-14 23:14:20,814 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2019-10-14 23:14:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:20,814 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-10-14 23:14:20,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:14:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-10-14 23:14:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 23:14:20,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:20,815 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:21,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:21,016 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1433404433, now seen corresponding path program 26 times [2019-10-14 23:14:21,017 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:21,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775639148] [2019-10-14 23:14:21,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:21,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:21,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:21,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775639148] [2019-10-14 23:14:21,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931700880] [2019-10-14 23:14:21,380 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:21,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:21,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:21,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 23:14:21,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:21,486 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:21,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 23:14:21,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590931452] [2019-10-14 23:14:21,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:14:21,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:21,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:14:21,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:14:21,487 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 31 states. [2019-10-14 23:14:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:21,652 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-10-14 23:14:21,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:14:21,652 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 64 [2019-10-14 23:14:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:21,652 INFO L225 Difference]: With dead ends: 74 [2019-10-14 23:14:21,653 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 23:14:21,653 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:14:21,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 23:14:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-10-14 23:14:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 23:14:21,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-10-14 23:14:21,657 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2019-10-14 23:14:21,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:21,657 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-10-14 23:14:21,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:14:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-10-14 23:14:21,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:14:21,658 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:21,658 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:21,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:21,863 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:21,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2023563597, now seen corresponding path program 27 times [2019-10-14 23:14:21,863 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:21,864 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182467421] [2019-10-14 23:14:21,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:21,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:21,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:22,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182467421] [2019-10-14 23:14:22,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903189149] [2019-10-14 23:14:22,389 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:27,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-10-14 23:14:27,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:27,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:14:27,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:27,643 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:27,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-10-14 23:14:27,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283431252] [2019-10-14 23:14:27,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:14:27,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:14:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:14:27,645 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 32 states. [2019-10-14 23:14:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:27,790 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-10-14 23:14:27,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 23:14:27,791 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 66 [2019-10-14 23:14:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:27,792 INFO L225 Difference]: With dead ends: 76 [2019-10-14 23:14:27,792 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 23:14:27,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:14:27,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 23:14:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-10-14 23:14:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 23:14:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-10-14 23:14:27,797 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2019-10-14 23:14:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:27,798 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-10-14 23:14:27,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 23:14:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-10-14 23:14:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 23:14:27,799 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:27,799 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:28,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:28,006 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:28,006 INFO L82 PathProgramCache]: Analyzing trace with hash 134846677, now seen corresponding path program 28 times [2019-10-14 23:14:28,007 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:28,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803928830] [2019-10-14 23:14:28,007 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,007 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:28,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803928830] [2019-10-14 23:14:28,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759094918] [2019-10-14 23:14:28,408 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:28,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:28,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:28,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:14:28,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:28,499 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:28,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 23:14:28,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246110116] [2019-10-14 23:14:28,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:14:28,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:28,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:14:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:14:28,501 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 33 states. [2019-10-14 23:14:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:28,648 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-10-14 23:14:28,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:14:28,648 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 68 [2019-10-14 23:14:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:28,649 INFO L225 Difference]: With dead ends: 78 [2019-10-14 23:14:28,649 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 23:14:28,650 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:14:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 23:14:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-14 23:14:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 23:14:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-10-14 23:14:28,654 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2019-10-14 23:14:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:28,654 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-10-14 23:14:28,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:14:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-10-14 23:14:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 23:14:28,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:28,655 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:28,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:28,859 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:28,859 INFO L82 PathProgramCache]: Analyzing trace with hash -102083977, now seen corresponding path program 29 times [2019-10-14 23:14:28,859 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:28,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427764068] [2019-10-14 23:14:28,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:29,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427764068] [2019-10-14 23:14:29,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556894348] [2019-10-14 23:14:29,344 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:29,850 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-10-14 23:14:29,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:29,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:14:29,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:29,870 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:29,870 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-10-14 23:14:29,870 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780623700] [2019-10-14 23:14:29,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:14:29,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:29,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:14:29,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:14:29,872 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 34 states. [2019-10-14 23:14:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:30,042 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-10-14 23:14:30,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 23:14:30,043 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 70 [2019-10-14 23:14:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:30,044 INFO L225 Difference]: With dead ends: 80 [2019-10-14 23:14:30,044 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 23:14:30,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:14:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 23:14:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 23:14:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:14:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-10-14 23:14:30,050 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2019-10-14 23:14:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:30,050 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-10-14 23:14:30,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:14:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-10-14 23:14:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 23:14:30,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:30,051 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:30,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:30,256 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash -159175783, now seen corresponding path program 30 times [2019-10-14 23:14:30,257 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:30,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737824972] [2019-10-14 23:14:30,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:30,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:30,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:30,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737824972] [2019-10-14 23:14:30,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776059596] [2019-10-14 23:14:30,707 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 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 23:14:37,248 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-10-14 23:14:37,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:37,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 23:14:37,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:37,281 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:37,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2019-10-14 23:14:37,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598880575] [2019-10-14 23:14:37,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 23:14:37,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:37,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 23:14:37,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:14:37,283 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 35 states. [2019-10-14 23:14:37,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:37,468 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-10-14 23:14:37,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:14:37,468 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 72 [2019-10-14 23:14:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:37,470 INFO L225 Difference]: With dead ends: 82 [2019-10-14 23:14:37,470 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 23:14:37,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:14:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 23:14:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-14 23:14:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:14:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-10-14 23:14:37,476 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2019-10-14 23:14:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:37,477 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-10-14 23:14:37,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 23:14:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-10-14 23:14:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 23:14:37,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:37,479 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:37,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:37,679 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:37,680 INFO L82 PathProgramCache]: Analyzing trace with hash 810173499, now seen corresponding path program 31 times [2019-10-14 23:14:37,680 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:37,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756210485] [2019-10-14 23:14:37,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:37,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:37,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:38,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756210485] [2019-10-14 23:14:38,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676371357] [2019-10-14 23:14:38,118 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 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 23:14:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:38,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 23:14:38,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:38,227 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:38,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-14 23:14:38,227 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508994444] [2019-10-14 23:14:38,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 23:14:38,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 23:14:38,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:14:38,228 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 36 states. [2019-10-14 23:14:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:38,455 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-10-14 23:14:38,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 23:14:38,455 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2019-10-14 23:14:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:38,456 INFO L225 Difference]: With dead ends: 84 [2019-10-14 23:14:38,456 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 23:14:38,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:14:38,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 23:14:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-14 23:14:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 23:14:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-10-14 23:14:38,461 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2019-10-14 23:14:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:38,461 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-10-14 23:14:38,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 23:14:38,462 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-10-14 23:14:38,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 23:14:38,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:38,462 INFO L380 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:38,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:38,666 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:38,666 INFO L82 PathProgramCache]: Analyzing trace with hash 346930269, now seen corresponding path program 32 times [2019-10-14 23:14:38,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:38,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150032146] [2019-10-14 23:14:38,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:38,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:38,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:39,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150032146] [2019-10-14 23:14:39,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970254374] [2019-10-14 23:14:39,151 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 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 [2019-10-14 23:14:39,238 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:39,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:39,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 23:14:39,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:39,268 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:39,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-14 23:14:39,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9800836] [2019-10-14 23:14:39,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 23:14:39,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:39,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 23:14:39,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:14:39,270 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 37 states. [2019-10-14 23:14:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:39,433 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-10-14 23:14:39,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 23:14:39,433 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 76 [2019-10-14 23:14:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:39,434 INFO L225 Difference]: With dead ends: 86 [2019-10-14 23:14:39,434 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:14:39,435 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:14:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:14:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 23:14:39,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 23:14:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-10-14 23:14:39,439 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2019-10-14 23:14:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:39,439 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-10-14 23:14:39,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 23:14:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-10-14 23:14:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 23:14:39,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:39,440 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:39,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:39,644 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:39,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:39,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1846785023, now seen corresponding path program 33 times [2019-10-14 23:14:39,644 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:39,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730893990] [2019-10-14 23:14:39,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:39,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:39,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:40,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730893990] [2019-10-14 23:14:40,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933008227] [2019-10-14 23:14:40,158 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true