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/loops-crafted-1/nested5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:18:43,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:18:43,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:18:43,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 12:18:43,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 12:18:43,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 12:18:43,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 12:18:43,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 12:18:43,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 12:18:43,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 12:18:43,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 12:18:43,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 12:18:43,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:18:43,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:18:43,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:18:43,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:18:43,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:18:43,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:18:43,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:18:43,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:18:43,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:18:43,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:18:43,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:18:43,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:18:43,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:18:43,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 12:18:43,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 12:18:43,593 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 12:18:43,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 12:18:43,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 12:18:43,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 12:18:43,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 12:18:43,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 12:18:43,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:18:43,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:18:43,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:18:43,599 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 [2019-09-05 12:18:43,612 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:18:43,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:18:43,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:18:43,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:18:43,614 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:18:43,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:18:43,615 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:18:43,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:18:43,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:18:43,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:18:43,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:18:43,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:18:43,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:18:43,616 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:18:43,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:18:43,616 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:18:43,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:18:43,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:18:43,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:18:43,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:18:43,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:18:43,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:18:43,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:18:43,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:18:43,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:18:43,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:18:43,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:18:43,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:18:43,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:18:43,645 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:18:43,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:18:43,661 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:18:43,662 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:18:43,663 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:18:43,663 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-2.c [2019-09-05 12:18:43,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2f9a2a19/1c6523253c8b4192aa3603c7dced7623/FLAG7045a3a25 [2019-09-05 12:18:44,100 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:18:44,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-2.c [2019-09-05 12:18:44,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2f9a2a19/1c6523253c8b4192aa3603c7dced7623/FLAG7045a3a25 [2019-09-05 12:18:44,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2f9a2a19/1c6523253c8b4192aa3603c7dced7623 [2019-09-05 12:18:44,502 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:18:44,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:18:44,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:18:44,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:18:44,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:18:44,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:18:44" (1/1) ... [2019-09-05 12:18:44,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17114e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44, skipping insertion in model container [2019-09-05 12:18:44,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:18:44" (1/1) ... [2019-09-05 12:18:44,523 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:18:44,542 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:18:44,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:18:44,749 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:18:44,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:18:44,791 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:18:44,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44 WrapperNode [2019-09-05 12:18:44,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:18:44,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:18:44,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:18:44,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:18:44,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44" (1/1) ... [2019-09-05 12:18:44,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44" (1/1) ... [2019-09-05 12:18:44,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44" (1/1) ... [2019-09-05 12:18:44,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44" (1/1) ... [2019-09-05 12:18:44,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44" (1/1) ... [2019-09-05 12:18:44,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44" (1/1) ... [2019-09-05 12:18:44,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44" (1/1) ... [2019-09-05 12:18:44,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:18:44,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:18:44,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:18:44,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:18:44,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44" (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 [2019-09-05 12:18:45,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:18:45,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:18:45,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:18:45,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:18:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:18:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:18:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:18:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:18:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:18:45,217 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:18:45,223 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-05 12:18:45,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:18:45 BoogieIcfgContainer [2019-09-05 12:18:45,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:18:45,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:18:45,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:18:45,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:18:45,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:18:44" (1/3) ... [2019-09-05 12:18:45,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665fc457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:18:45, skipping insertion in model container [2019-09-05 12:18:45,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:18:44" (2/3) ... [2019-09-05 12:18:45,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@665fc457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:18:45, skipping insertion in model container [2019-09-05 12:18:45,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:18:45" (3/3) ... [2019-09-05 12:18:45,245 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2019-09-05 12:18:45,274 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:18:45,291 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:18:45,329 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:18:45,365 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:18:45,366 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:18:45,366 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:18:45,366 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:18:45,366 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:18:45,366 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:18:45,367 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:18:45,367 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:18:45,367 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:18:45,383 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-05 12:18:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-05 12:18:45,388 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:45,389 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:45,391 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:45,397 INFO L82 PathProgramCache]: Analyzing trace with hash -84144223, now seen corresponding path program 1 times [2019-09-05 12:18:45,399 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:45,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:45,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:45,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:18:45,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:45,523 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:18:45,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:18:45,527 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:18:45,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:18:45,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:18:45,539 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-09-05 12:18:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:45,559 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2019-09-05 12:18:45,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:18:45,560 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-09-05 12:18:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:45,567 INFO L225 Difference]: With dead ends: 47 [2019-09-05 12:18:45,567 INFO L226 Difference]: Without dead ends: 22 [2019-09-05 12:18:45,570 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:18:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-05 12:18:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-05 12:18:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-05 12:18:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-09-05 12:18:45,601 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-09-05 12:18:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:45,602 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-09-05 12:18:45,602 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:18:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-09-05 12:18:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-05 12:18:45,603 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:45,603 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:45,603 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash -89685349, now seen corresponding path program 1 times [2019-09-05 12:18:45,604 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:45,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:45,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:45,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:18:45,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:45,714 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:18:45,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 12:18:45,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 12:18:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 12:18:45,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:18:45,717 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-09-05 12:18:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:45,755 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2019-09-05 12:18:45,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 12:18:45,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-09-05 12:18:45,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:45,758 INFO L225 Difference]: With dead ends: 48 [2019-09-05 12:18:45,758 INFO L226 Difference]: Without dead ends: 31 [2019-09-05 12:18:45,759 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:18:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-05 12:18:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-09-05 12:18:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-05 12:18:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-05 12:18:45,767 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2019-09-05 12:18:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:45,768 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-05 12:18:45,768 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 12:18:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-05 12:18:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 12:18:45,769 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:45,769 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:45,770 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:45,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:45,770 INFO L82 PathProgramCache]: Analyzing trace with hash 374245081, now seen corresponding path program 1 times [2019-09-05 12:18:45,770 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:45,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:45,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:45,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:18:45,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:45,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:45,885 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:45,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:18:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:45,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-05 12:18:45,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:45,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:45,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-05 12:18:45,981 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:18:45,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:18:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:18:45,982 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-09-05 12:18:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:46,030 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2019-09-05 12:18:46,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-05 12:18:46,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-05 12:18:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:46,032 INFO L225 Difference]: With dead ends: 51 [2019-09-05 12:18:46,032 INFO L226 Difference]: Without dead ends: 33 [2019-09-05 12:18:46,033 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:18:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-05 12:18:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2019-09-05 12:18:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-05 12:18:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-09-05 12:18:46,040 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2019-09-05 12:18:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:46,041 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-09-05 12:18:46,041 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:18:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-09-05 12:18:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-05 12:18:46,042 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:46,042 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:46,042 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:46,043 INFO L82 PathProgramCache]: Analyzing trace with hash -465210473, now seen corresponding path program 2 times [2019-09-05 12:18:46,043 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:46,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:46,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:46,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:18:46,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:46,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:46,143 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:18:46,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:46,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:18:46,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:46,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-05 12:18:46,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:46,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:46,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-05 12:18:46,214 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:18:46,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:18:46,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:18:46,215 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-09-05 12:18:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:46,271 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-09-05 12:18:46,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:18:46,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-09-05 12:18:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:46,273 INFO L225 Difference]: With dead ends: 55 [2019-09-05 12:18:46,273 INFO L226 Difference]: Without dead ends: 35 [2019-09-05 12:18:46,274 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:18:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-05 12:18:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2019-09-05 12:18:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-05 12:18:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-05 12:18:46,281 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2019-09-05 12:18:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:46,281 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-05 12:18:46,281 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:18:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-05 12:18:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-05 12:18:46,282 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:46,283 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:46,283 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:46,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:46,283 INFO L82 PathProgramCache]: Analyzing trace with hash 271853781, now seen corresponding path program 3 times [2019-09-05 12:18:46,284 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:46,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:46,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:46,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:46,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:46,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:46,430 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:18:46,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:46,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-05 12:18:46,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:46,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-05 12:18:46,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:46,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:46,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-05 12:18:46,526 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:18:46,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:18:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:18:46,527 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2019-09-05 12:18:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:46,593 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2019-09-05 12:18:46,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:18:46,594 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-09-05 12:18:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:46,595 INFO L225 Difference]: With dead ends: 59 [2019-09-05 12:18:46,595 INFO L226 Difference]: Without dead ends: 37 [2019-09-05 12:18:46,596 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:18:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-05 12:18:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-09-05 12:18:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-05 12:18:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-05 12:18:46,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-09-05 12:18:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:46,603 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-05 12:18:46,603 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:18:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-05 12:18:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-05 12:18:46,604 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:46,604 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:46,605 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:46,605 INFO L82 PathProgramCache]: Analyzing trace with hash -79001965, now seen corresponding path program 4 times [2019-09-05 12:18:46,605 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:46,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:46,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:46,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:46,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:46,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:46,721 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:46,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:18:46,749 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:18:46,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:46,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-05 12:18:46,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:46,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:46,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-05 12:18:46,784 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:18:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:18:46,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:18:46,785 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-09-05 12:18:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:46,856 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2019-09-05 12:18:46,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:18:46,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-09-05 12:18:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:46,858 INFO L225 Difference]: With dead ends: 63 [2019-09-05 12:18:46,858 INFO L226 Difference]: Without dead ends: 39 [2019-09-05 12:18:46,858 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:18:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-05 12:18:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-09-05 12:18:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-05 12:18:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-05 12:18:46,863 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2019-09-05 12:18:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:46,864 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-05 12:18:46,864 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:18:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-05 12:18:46,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-05 12:18:46,865 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:46,865 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:46,865 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:46,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:46,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2051042513, now seen corresponding path program 5 times [2019-09-05 12:18:46,866 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:46,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:46,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:46,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:46,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:46,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:46,986 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:47,003 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:18:48,886 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-05 12:18:48,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:48,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 12:18:48,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:48,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:48,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-05 12:18:48,925 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:18:48,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:18:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:18:48,926 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-09-05 12:18:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:49,046 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2019-09-05 12:18:49,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:18:49,047 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-05 12:18:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:49,048 INFO L225 Difference]: With dead ends: 67 [2019-09-05 12:18:49,048 INFO L226 Difference]: Without dead ends: 41 [2019-09-05 12:18:49,049 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:18:49,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-05 12:18:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2019-09-05 12:18:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-05 12:18:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-05 12:18:49,061 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2019-09-05 12:18:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:49,061 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-05 12:18:49,062 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:18:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-05 12:18:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-05 12:18:49,063 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:49,063 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:49,063 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash 324385679, now seen corresponding path program 6 times [2019-09-05 12:18:49,063 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:49,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:49,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:49,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:49,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:49,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:49,230 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:49,244 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:18:49,271 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-05 12:18:49,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:49,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 12:18:49,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:49,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:49,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-05 12:18:49,304 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:18:49,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:18:49,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:18:49,305 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 10 states. [2019-09-05 12:18:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:49,420 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-09-05 12:18:49,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:18:49,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-09-05 12:18:49,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:49,423 INFO L225 Difference]: With dead ends: 71 [2019-09-05 12:18:49,423 INFO L226 Difference]: Without dead ends: 43 [2019-09-05 12:18:49,424 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:18:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-05 12:18:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2019-09-05 12:18:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-05 12:18:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-09-05 12:18:49,436 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2019-09-05 12:18:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:49,436 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-09-05 12:18:49,437 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:18:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-09-05 12:18:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 12:18:49,439 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:49,439 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:49,439 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1135455539, now seen corresponding path program 7 times [2019-09-05 12:18:49,440 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:49,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:49,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:49,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:49,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:49,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:49,603 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:18:49,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:49,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-05 12:18:49,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:49,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:49,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-05 12:18:49,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:18:49,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:18:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:18:49,677 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2019-09-05 12:18:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:49,802 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2019-09-05 12:18:49,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:18:49,803 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-09-05 12:18:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:49,804 INFO L225 Difference]: With dead ends: 75 [2019-09-05 12:18:49,804 INFO L226 Difference]: Without dead ends: 45 [2019-09-05 12:18:49,805 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:18:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-05 12:18:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2019-09-05 12:18:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-05 12:18:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-09-05 12:18:49,810 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2019-09-05 12:18:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:49,811 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-09-05 12:18:49,811 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:18:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-09-05 12:18:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-05 12:18:49,812 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:49,812 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:49,812 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash 411439755, now seen corresponding path program 8 times [2019-09-05 12:18:49,813 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:49,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:49,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:49,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:18:49,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:49,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:49,974 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:18:50,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:18:50,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:18:50,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:50,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 12:18:50,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:50,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:18:50,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-05 12:18:50,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 12:18:50,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 12:18:50,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:18:50,068 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 12 states. [2019-09-05 12:18:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:50,215 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2019-09-05 12:18:50,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:18:50,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2019-09-05 12:18:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:50,216 INFO L225 Difference]: With dead ends: 79 [2019-09-05 12:18:50,216 INFO L226 Difference]: Without dead ends: 47 [2019-09-05 12:18:50,217 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:18:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-05 12:18:50,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-09-05 12:18:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-05 12:18:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-09-05 12:18:50,227 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2019-09-05 12:18:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:50,228 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-09-05 12:18:50,228 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 12:18:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-09-05 12:18:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-05 12:18:50,229 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:50,229 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:50,229 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:50,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:50,230 INFO L82 PathProgramCache]: Analyzing trace with hash 919132873, now seen corresponding path program 9 times [2019-09-05 12:18:50,230 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:50,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:50,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:50,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:50,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:50,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:18:50,393 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:18:50,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:19:32,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-05 12:19:32,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:19:32,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-05 12:19:32,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:19:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:19:32,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:19:32,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-05 12:19:32,653 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:19:32,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:19:32,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:19:32,655 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 13 states. [2019-09-05 12:19:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:19:32,810 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2019-09-05 12:19:32,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 12:19:32,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-09-05 12:19:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:19:32,812 INFO L225 Difference]: With dead ends: 83 [2019-09-05 12:19:32,812 INFO L226 Difference]: Without dead ends: 49 [2019-09-05 12:19:32,813 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:19:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-05 12:19:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2019-09-05 12:19:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-05 12:19:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-09-05 12:19:32,817 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2019-09-05 12:19:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:19:32,818 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-09-05 12:19:32,818 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:19:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-09-05 12:19:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-05 12:19:32,819 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:19:32,819 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:19:32,819 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:19:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:19:32,820 INFO L82 PathProgramCache]: Analyzing trace with hash -814052473, now seen corresponding path program 10 times [2019-09-05 12:19:32,820 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:19:32,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:19:32,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:32,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:19:32,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:19:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:19:33,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:19:33,010 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:19:33,027 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:19:33,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:19:33,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:19:33,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:19:33,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:19:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:19:33,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:19:33,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-05 12:19:33,079 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:19:33,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:19:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:19:33,080 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 14 states. [2019-09-05 12:19:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:19:33,298 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2019-09-05 12:19:33,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:19:33,299 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2019-09-05 12:19:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:19:33,300 INFO L225 Difference]: With dead ends: 87 [2019-09-05 12:19:33,300 INFO L226 Difference]: Without dead ends: 51 [2019-09-05 12:19:33,301 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:19:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-05 12:19:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2019-09-05 12:19:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-05 12:19:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-05 12:19:33,305 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2019-09-05 12:19:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:19:33,306 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-05 12:19:33,306 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:19:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-05 12:19:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-05 12:19:33,307 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:19:33,307 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:19:33,307 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:19:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:19:33,307 INFO L82 PathProgramCache]: Analyzing trace with hash 42140869, now seen corresponding path program 11 times [2019-09-05 12:19:33,308 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:19:33,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:19:33,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:33,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:19:33,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:19:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:19:33,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:19:33,472 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:19:33,486 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:21:03,526 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-05 12:21:03,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:03,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-05 12:21:03,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:21:03,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:21:03,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-05 12:21:03,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:21:03,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:21:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:21:03,890 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 15 states. [2019-09-05 12:21:04,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:04,083 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2019-09-05 12:21:04,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:21:04,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2019-09-05 12:21:04,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:04,084 INFO L225 Difference]: With dead ends: 91 [2019-09-05 12:21:04,084 INFO L226 Difference]: Without dead ends: 53 [2019-09-05 12:21:04,085 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:21:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-05 12:21:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2019-09-05 12:21:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-05 12:21:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-09-05 12:21:04,090 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2019-09-05 12:21:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:04,090 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-09-05 12:21:04,091 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:21:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-09-05 12:21:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-05 12:21:04,091 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:04,092 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:04,092 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:04,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:04,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1789778301, now seen corresponding path program 12 times [2019-09-05 12:21:04,092 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:04,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:04,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:04,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:04,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:21:04,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:21:04,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:21:04,284 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:21:06,837 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-05 12:21:06,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:06,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-05 12:21:06,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:21:06,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:21:06,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-05 12:21:06,890 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:21:06,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:21:06,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:21:06,891 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 16 states. [2019-09-05 12:21:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:07,161 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2019-09-05 12:21:07,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:21:07,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2019-09-05 12:21:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:07,163 INFO L225 Difference]: With dead ends: 95 [2019-09-05 12:21:07,163 INFO L226 Difference]: Without dead ends: 55 [2019-09-05 12:21:07,164 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:21:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-05 12:21:07,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-09-05 12:21:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-05 12:21:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-05 12:21:07,168 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2019-09-05 12:21:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:07,168 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-05 12:21:07,168 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:21:07,169 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-05 12:21:07,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-05 12:21:07,169 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:07,170 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:07,170 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1327509311, now seen corresponding path program 13 times [2019-09-05 12:21:07,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:07,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:07,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:07,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:07,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:21:07,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:21:07,362 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:21:07,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:07,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-05 12:21:07,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:21:07,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:21:07,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-05 12:21:07,439 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-05 12:21:07,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-05 12:21:07,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:21:07,440 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 17 states. [2019-09-05 12:21:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:07,738 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-09-05 12:21:07,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:21:07,738 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2019-09-05 12:21:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:07,739 INFO L225 Difference]: With dead ends: 99 [2019-09-05 12:21:07,739 INFO L226 Difference]: Without dead ends: 57 [2019-09-05 12:21:07,740 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:21:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-05 12:21:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2019-09-05 12:21:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-05 12:21:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-09-05 12:21:07,746 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2019-09-05 12:21:07,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:07,746 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-09-05 12:21:07,746 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-05 12:21:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-09-05 12:21:07,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-05 12:21:07,747 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:07,747 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:07,747 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:07,748 INFO L82 PathProgramCache]: Analyzing trace with hash 531358591, now seen corresponding path program 14 times [2019-09-05 12:21:07,748 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:07,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:07,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:07,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:21:07,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:21:07,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:21:07,983 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:21:08,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:21:08,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:21:08,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:08,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-05 12:21:08,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:21:08,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:21:08,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-05 12:21:08,072 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:21:08,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:21:08,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:21:08,072 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 18 states. [2019-09-05 12:21:08,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:21:08,425 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-09-05 12:21:08,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:21:08,425 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2019-09-05 12:21:08,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:21:08,426 INFO L225 Difference]: With dead ends: 103 [2019-09-05 12:21:08,426 INFO L226 Difference]: Without dead ends: 59 [2019-09-05 12:21:08,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:21:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-05 12:21:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2019-09-05 12:21:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-05 12:21:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-05 12:21:08,431 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2019-09-05 12:21:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:21:08,432 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-05 12:21:08,432 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:21:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-05 12:21:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-05 12:21:08,433 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:21:08,433 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:21:08,433 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:21:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:21:08,434 INFO L82 PathProgramCache]: Analyzing trace with hash 197017277, now seen corresponding path program 15 times [2019-09-05 12:21:08,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:21:08,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:21:08,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:08,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:21:08,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:21:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:21:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:21:08,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:21:08,727 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:21:08,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:22:43,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-05 12:22:43,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:22:43,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-05 12:22:43,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:22:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:22:43,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:22:43,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-05 12:22:43,257 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:22:43,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:22:43,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:22:43,258 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 19 states. [2019-09-05 12:22:43,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:22:43,593 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2019-09-05 12:22:43,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 12:22:43,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2019-09-05 12:22:43,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:22:43,595 INFO L225 Difference]: With dead ends: 107 [2019-09-05 12:22:43,595 INFO L226 Difference]: Without dead ends: 61 [2019-09-05 12:22:43,595 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:22:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-05 12:22:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2019-09-05 12:22:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-05 12:22:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-09-05 12:22:43,599 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 44 [2019-09-05 12:22:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:22:43,600 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-09-05 12:22:43,600 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:22:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-09-05 12:22:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-05 12:22:43,601 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:22:43,601 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:22:43,601 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:22:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:22:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1017561723, now seen corresponding path program 16 times [2019-09-05 12:22:43,601 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:22:43,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:22:43,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:43,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:22:43,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:22:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:22:43,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:22:43,854 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:22:43,867 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:22:43,882 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:22:43,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:22:43,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-05 12:22:43,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:22:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:22:43,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:22:43,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-05 12:22:43,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 12:22:43,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 12:22:43,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:22:43,930 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 20 states. [2019-09-05 12:22:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:22:44,351 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2019-09-05 12:22:44,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:22:44,353 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2019-09-05 12:22:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:22:44,354 INFO L225 Difference]: With dead ends: 111 [2019-09-05 12:22:44,354 INFO L226 Difference]: Without dead ends: 63 [2019-09-05 12:22:44,355 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:22:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-05 12:22:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2019-09-05 12:22:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-05 12:22:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2019-09-05 12:22:44,359 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 46 [2019-09-05 12:22:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:22:44,359 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2019-09-05 12:22:44,359 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 12:22:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2019-09-05 12:22:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-05 12:22:44,360 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:22:44,360 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:22:44,360 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:22:44,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:22:44,361 INFO L82 PathProgramCache]: Analyzing trace with hash -713208135, now seen corresponding path program 17 times [2019-09-05 12:22:44,361 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:22:44,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:22:44,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:44,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:22:44,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:22:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:22:44,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:22:44,629 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:22:44,641 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:25:45,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-05 12:25:45,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:25:50,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-05 12:25:50,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:25:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:25:50,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:25:50,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-05 12:25:50,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:25:50,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:25:50,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:25:50,072 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 21 states. [2019-09-05 12:25:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:25:50,517 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2019-09-05 12:25:50,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:25:50,518 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2019-09-05 12:25:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:25:50,518 INFO L225 Difference]: With dead ends: 115 [2019-09-05 12:25:50,518 INFO L226 Difference]: Without dead ends: 65 [2019-09-05 12:25:50,519 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:25:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-05 12:25:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2019-09-05 12:25:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-05 12:25:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-09-05 12:25:50,527 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 48 [2019-09-05 12:25:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:25:50,527 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-09-05 12:25:50,527 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:25:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-09-05 12:25:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-05 12:25:50,528 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:25:50,528 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:25:50,528 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:25:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:25:50,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1830698121, now seen corresponding path program 18 times [2019-09-05 12:25:50,529 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:25:50,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:25:50,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:25:50,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:25:50,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:25:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:25:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:25:50,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:25:50,837 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:25:50,847 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:27:03,881 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-05 12:27:03,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:04,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-05 12:27:04,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:04,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:27:04,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-05 12:27:04,296 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-05 12:27:04,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-05 12:27:04,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:27:04,297 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 22 states. [2019-09-05 12:27:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:04,832 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2019-09-05 12:27:04,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-05 12:27:04,836 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2019-09-05 12:27:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:04,837 INFO L225 Difference]: With dead ends: 119 [2019-09-05 12:27:04,837 INFO L226 Difference]: Without dead ends: 67 [2019-09-05 12:27:04,838 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:27:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-05 12:27:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-09-05 12:27:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-05 12:27:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-09-05 12:27:04,844 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2019-09-05 12:27:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:04,845 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-09-05 12:27:04,845 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-05 12:27:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-09-05 12:27:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-05 12:27:04,845 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:04,845 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:04,846 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:04,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1996750667, now seen corresponding path program 19 times [2019-09-05 12:27:04,846 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:04,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:04,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:04,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:04,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:05,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:27:05,348 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:27:05,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:05,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-05 12:27:05,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:05,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:27:05,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-05 12:27:05,447 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:27:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:27:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:27:05,448 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 23 states. [2019-09-05 12:27:06,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:06,014 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-09-05 12:27:06,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:27:06,014 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2019-09-05 12:27:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:06,015 INFO L225 Difference]: With dead ends: 123 [2019-09-05 12:27:06,015 INFO L226 Difference]: Without dead ends: 69 [2019-09-05 12:27:06,016 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:27:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-05 12:27:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2019-09-05 12:27:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-05 12:27:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-09-05 12:27:06,019 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2019-09-05 12:27:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:06,020 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-09-05 12:27:06,020 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:27:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-09-05 12:27:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-05 12:27:06,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:06,021 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:06,021 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:06,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1635509875, now seen corresponding path program 20 times [2019-09-05 12:27:06,022 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:06,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:06,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:06,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:27:06,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:06,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:27:06,368 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:27:06,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:27:06,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:27:06,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:27:06,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-05 12:27:06,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:27:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:06,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:27:06,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-05 12:27:06,456 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:27:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:27:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:27:06,457 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 24 states. [2019-09-05 12:27:07,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:27:07,050 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2019-09-05 12:27:07,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-05 12:27:07,053 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2019-09-05 12:27:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:27:07,053 INFO L225 Difference]: With dead ends: 127 [2019-09-05 12:27:07,054 INFO L226 Difference]: Without dead ends: 71 [2019-09-05 12:27:07,054 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:27:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-05 12:27:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2019-09-05 12:27:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-05 12:27:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-09-05 12:27:07,058 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 54 [2019-09-05 12:27:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:27:07,058 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-09-05 12:27:07,058 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:27:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-09-05 12:27:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-05 12:27:07,059 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:27:07,059 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:27:07,060 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:27:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:27:07,060 INFO L82 PathProgramCache]: Analyzing trace with hash 429479089, now seen corresponding path program 21 times [2019-09-05 12:27:07,060 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:27:07,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:27:07,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:07,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:27:07,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:27:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:27:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:27:07,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:27:07,463 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:27:07,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:29:03,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-05 12:29:03,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:03,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-05 12:29:03,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:29:03,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:29:03,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-05 12:29:03,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:29:03,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:29:03,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:29:03,759 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 25 states. [2019-09-05 12:29:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:04,445 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2019-09-05 12:29:04,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:29:04,445 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2019-09-05 12:29:04,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:04,447 INFO L225 Difference]: With dead ends: 131 [2019-09-05 12:29:04,447 INFO L226 Difference]: Without dead ends: 73 [2019-09-05 12:29:04,448 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:29:04,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-05 12:29:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2019-09-05 12:29:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-05 12:29:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-09-05 12:29:04,451 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 56 [2019-09-05 12:29:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:04,452 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-09-05 12:29:04,452 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:29:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-09-05 12:29:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-05 12:29:04,453 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:04,453 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:04,453 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:04,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:04,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1075063663, now seen corresponding path program 22 times [2019-09-05 12:29:04,453 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:04,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:04,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:04,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:04,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:29:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:29:04,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:29:04,839 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:29:04,852 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:29:04,867 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:29:04,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:04,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-05 12:29:04,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:29:04,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 12:29:04,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-05 12:29:04,913 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-05 12:29:04,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-05 12:29:04,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:29:04,913 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 26 states. [2019-09-05 12:29:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:05,666 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2019-09-05 12:29:05,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-05 12:29:05,667 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2019-09-05 12:29:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:05,668 INFO L225 Difference]: With dead ends: 135 [2019-09-05 12:29:05,668 INFO L226 Difference]: Without dead ends: 75 [2019-09-05 12:29:05,669 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:29:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-05 12:29:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2019-09-05 12:29:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-05 12:29:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-09-05 12:29:05,672 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2019-09-05 12:29:05,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:05,673 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-09-05 12:29:05,673 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-05 12:29:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-09-05 12:29:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-05 12:29:05,673 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:05,673 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:05,674 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:05,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1288418643, now seen corresponding path program 23 times [2019-09-05 12:29:05,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:05,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:05,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:05,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:05,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:29:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:29:06,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:29:06,080 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:29:06,092 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1