java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copyInit_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:44:15,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:44:15,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:44:15,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:44:15,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:44:15,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:44:15,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:44:15,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:44:15,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:44:15,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:44:15,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:44:15,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:44:15,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:44:15,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:44:15,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:44:15,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:44:15,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:44:15,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:44:15,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:44:15,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:44:15,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:44:15,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:44:15,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:44:15,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:44:15,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:44:15,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:44:15,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:44:15,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:44:15,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:44:15,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:44:15,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:44:15,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:44:15,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:44:15,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:44:15,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:44:15,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:44:15,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:44:15,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:44:15,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:44:15,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:44:15,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:44:15,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:44:16,015 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:44:16,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:44:16,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:44:16,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:44:16,017 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:44:16,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:44:16,017 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:44:16,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:44:16,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:44:16,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:44:16,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:44:16,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:44:16,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:44:16,021 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:44:16,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:44:16,022 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:44:16,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:44:16,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:44:16,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:44:16,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:44:16,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:44:16,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:16,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:44:16,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:44:16,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:44:16,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:44:16,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:44:16,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:44:16,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:44:16,298 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:44:16,311 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:44:16,314 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:44:16,316 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:44:16,316 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:44:16,317 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInit_ground.i [2019-10-14 21:44:16,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80c182df3/ae96d8baca494f0e86022b37f82e22cb/FLAGa0faa5e12 [2019-10-14 21:44:16,829 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:44:16,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInit_ground.i [2019-10-14 21:44:16,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80c182df3/ae96d8baca494f0e86022b37f82e22cb/FLAGa0faa5e12 [2019-10-14 21:44:17,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80c182df3/ae96d8baca494f0e86022b37f82e22cb [2019-10-14 21:44:17,222 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:44:17,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:44:17,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:17,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:44:17,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:44:17,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:17" (1/1) ... [2019-10-14 21:44:17,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@351bcc33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17, skipping insertion in model container [2019-10-14 21:44:17,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:17" (1/1) ... [2019-10-14 21:44:17,239 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:44:17,257 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:44:17,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:17,458 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:44:17,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:17,497 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:44:17,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17 WrapperNode [2019-10-14 21:44:17,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:17,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:44:17,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:44:17,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:44:17,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17" (1/1) ... [2019-10-14 21:44:17,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17" (1/1) ... [2019-10-14 21:44:17,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17" (1/1) ... [2019-10-14 21:44:17,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17" (1/1) ... [2019-10-14 21:44:17,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17" (1/1) ... [2019-10-14 21:44:17,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17" (1/1) ... [2019-10-14 21:44:17,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17" (1/1) ... [2019-10-14 21:44:17,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:44:17,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:44:17,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:44:17,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:44:17,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:17,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:44:17,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:44:17,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:44:17,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:44:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:44:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:44:17,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:44:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:44:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:44:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:44:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:44:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:44:17,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:44:17,891 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:44:17,892 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:44:17,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:17 BoogieIcfgContainer [2019-10-14 21:44:17,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:44:17,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:44:17,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:44:17,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:44:17,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:44:17" (1/3) ... [2019-10-14 21:44:17,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d368f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:17, skipping insertion in model container [2019-10-14 21:44:17,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:17" (2/3) ... [2019-10-14 21:44:17,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d368f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:17, skipping insertion in model container [2019-10-14 21:44:17,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:17" (3/3) ... [2019-10-14 21:44:17,900 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInit_ground.i [2019-10-14 21:44:17,908 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:44:17,915 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:44:17,926 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:44:17,950 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:44:17,951 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:44:17,951 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:44:17,951 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:44:17,951 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:44:17,951 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:44:17,951 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:44:17,952 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:44:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-14 21:44:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:44:17,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:17,973 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:17,974 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:17,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:17,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1085876810, now seen corresponding path program 1 times [2019-10-14 21:44:17,988 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:17,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646997751] [2019-10-14 21:44:17,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:17,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:17,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:18,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646997751] [2019-10-14 21:44:18,159 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:18,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:44:18,160 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244364443] [2019-10-14 21:44:18,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:44:18,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:18,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:44:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:18,189 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-14 21:44:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:18,307 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-10-14 21:44:18,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:44:18,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:44:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:18,318 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:44:18,318 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 21:44:18,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 21:44:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 21:44:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:44:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-14 21:44:18,369 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2019-10-14 21:44:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:18,370 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-14 21:44:18,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:44:18,371 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-14 21:44:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:44:18,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:18,372 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:18,372 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash -274239930, now seen corresponding path program 1 times [2019-10-14 21:44:18,373 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:18,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891455732] [2019-10-14 21:44:18,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:18,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:18,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:18,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891455732] [2019-10-14 21:44:18,456 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:18,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:18,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652304208] [2019-10-14 21:44:18,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:18,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:18,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:18,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:18,459 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2019-10-14 21:44:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:18,533 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-10-14 21:44:18,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:18,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:44:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:18,535 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:44:18,536 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:44:18,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:44:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-14 21:44:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:44:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 21:44:18,545 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-10-14 21:44:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:18,545 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 21:44:18,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 21:44:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:44:18,546 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:18,546 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:18,547 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:18,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:18,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1258895644, now seen corresponding path program 1 times [2019-10-14 21:44:18,548 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:18,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366104207] [2019-10-14 21:44:18,548 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:18,549 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:18,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:44:18,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366104207] [2019-10-14 21:44:18,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539351386] [2019-10-14 21:44:18,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:18,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:44:18,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:44:18,735 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:18,735 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:44:18,736 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490427564] [2019-10-14 21:44:18,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:44:18,737 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:18,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:44:18,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:18,737 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2019-10-14 21:44:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:18,840 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-10-14 21:44:18,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:44:18,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-14 21:44:18,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:18,843 INFO L225 Difference]: With dead ends: 42 [2019-10-14 21:44:18,843 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:44:18,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:44:18,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-14 21:44:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:44:18,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-14 21:44:18,856 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2019-10-14 21:44:18,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:18,857 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-14 21:44:18,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:44:18,857 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-14 21:44:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:44:18,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:18,860 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:19,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:19,065 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:19,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1615172030, now seen corresponding path program 2 times [2019-10-14 21:44:19,067 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:19,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602671261] [2019-10-14 21:44:19,067 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:44:19,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602671261] [2019-10-14 21:44:19,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747982762] [2019-10-14 21:44:19,172 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:19,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:19,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:19,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:44:19,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:44:19,234 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:19,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:44:19,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781355507] [2019-10-14 21:44:19,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:44:19,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:19,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:44:19,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:19,237 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2019-10-14 21:44:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:19,329 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-10-14 21:44:19,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:44:19,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-10-14 21:44:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:19,331 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:44:19,331 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:44:19,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:44:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:44:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:44:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-14 21:44:19,338 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2019-10-14 21:44:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:19,338 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-14 21:44:19,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:44:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-14 21:44:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:44:19,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:19,339 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:19,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:19,544 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:19,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:19,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1115557856, now seen corresponding path program 3 times [2019-10-14 21:44:19,544 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:19,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696106167] [2019-10-14 21:44:19,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:19,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:44:19,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696106167] [2019-10-14 21:44:19,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27736375] [2019-10-14 21:44:19,654 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:19,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:44:19,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:19,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:44:19,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:44:19,730 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:19,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:44:19,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524955912] [2019-10-14 21:44:19,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:44:19,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:44:19,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:19,734 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2019-10-14 21:44:19,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:19,829 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2019-10-14 21:44:19,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:44:19,829 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-14 21:44:19,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:19,831 INFO L225 Difference]: With dead ends: 52 [2019-10-14 21:44:19,831 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:44:19,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:44:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 21:44:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:44:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-14 21:44:19,841 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2019-10-14 21:44:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:19,843 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-14 21:44:19,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:44:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-14 21:44:19,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:44:19,844 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:19,847 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:20,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:20,058 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:20,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1574965310, now seen corresponding path program 4 times [2019-10-14 21:44:20,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:20,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966353790] [2019-10-14 21:44:20,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:20,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:20,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:44:20,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966353790] [2019-10-14 21:44:20,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784775243] [2019-10-14 21:44:20,156 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:20,194 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:20,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:20,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:44:20,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:44:20,229 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:20,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:44:20,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276476077] [2019-10-14 21:44:20,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:44:20,232 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:20,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:44:20,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:20,233 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2019-10-14 21:44:20,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:20,368 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2019-10-14 21:44:20,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:44:20,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-10-14 21:44:20,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:20,369 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:44:20,369 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:44:20,371 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:20,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:44:20,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 21:44:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:44:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-14 21:44:20,380 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2019-10-14 21:44:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:20,381 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-14 21:44:20,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:44:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-14 21:44:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:44:20,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:20,382 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:20,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:20,586 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:20,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1364556508, now seen corresponding path program 5 times [2019-10-14 21:44:20,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:20,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858030974] [2019-10-14 21:44:20,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:20,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:20,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:44:20,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858030974] [2019-10-14 21:44:20,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228618419] [2019-10-14 21:44:20,700 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:20,790 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:44:20,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:20,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:44:20,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:44:20,823 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:20,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:44:20,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729898026] [2019-10-14 21:44:20,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:44:20,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:20,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:44:20,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:20,827 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 10 states. [2019-10-14 21:44:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:20,939 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2019-10-14 21:44:20,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:44:20,940 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-10-14 21:44:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:20,940 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:44:20,941 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:44:20,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:44:20,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-10-14 21:44:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:44:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-10-14 21:44:20,952 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2019-10-14 21:44:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:20,953 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-10-14 21:44:20,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:44:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-10-14 21:44:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:44:20,956 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:20,957 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:21,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:21,162 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:21,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2008503354, now seen corresponding path program 6 times [2019-10-14 21:44:21,162 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:21,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906485625] [2019-10-14 21:44:21,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:21,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:21,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:44:21,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906485625] [2019-10-14 21:44:21,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031734282] [2019-10-14 21:44:21,258 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:21,328 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:44:21,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:21,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:44:21,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:44:21,363 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:21,363 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:44:21,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439274365] [2019-10-14 21:44:21,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:44:21,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:21,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:44:21,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:44:21,365 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 11 states. [2019-10-14 21:44:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:21,481 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2019-10-14 21:44:21,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:44:21,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-10-14 21:44:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:21,482 INFO L225 Difference]: With dead ends: 67 [2019-10-14 21:44:21,482 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:44:21,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:44:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:44:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:44:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:44:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-14 21:44:21,489 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2019-10-14 21:44:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:21,489 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-14 21:44:21,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:44:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-14 21:44:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:44:21,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:21,491 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:21,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:21,695 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:21,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1155270616, now seen corresponding path program 7 times [2019-10-14 21:44:21,696 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:21,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099511642] [2019-10-14 21:44:21,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:21,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:21,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-14 21:44:21,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099511642] [2019-10-14 21:44:21,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313089270] [2019-10-14 21:44:21,819 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:21,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:44:21,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-14 21:44:21,886 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:21,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:44:21,886 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10758624] [2019-10-14 21:44:21,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:44:21,887 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:44:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:21,887 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 12 states. [2019-10-14 21:44:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:21,987 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2019-10-14 21:44:21,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:44:21,987 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-10-14 21:44:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:21,988 INFO L225 Difference]: With dead ends: 72 [2019-10-14 21:44:21,988 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:44:21,989 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:44:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-14 21:44:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:44:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-10-14 21:44:21,994 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2019-10-14 21:44:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:21,995 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-10-14 21:44:21,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:44:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-10-14 21:44:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:44:21,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:21,996 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:22,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:22,201 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:22,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:22,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2090911178, now seen corresponding path program 8 times [2019-10-14 21:44:22,201 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:22,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449924345] [2019-10-14 21:44:22,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:22,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:22,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:44:22,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449924345] [2019-10-14 21:44:22,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278227119] [2019-10-14 21:44:22,331 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:22,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:22,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:22,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:44:22,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:44:22,418 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:22,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:44:22,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317359748] [2019-10-14 21:44:22,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:44:22,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:22,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:44:22,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:44:22,420 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 13 states. [2019-10-14 21:44:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:22,518 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2019-10-14 21:44:22,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:44:22,519 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-10-14 21:44:22,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:22,520 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:44:22,520 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:44:22,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:44:22,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:44:22,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-10-14 21:44:22,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:44:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2019-10-14 21:44:22,529 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 39 [2019-10-14 21:44:22,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:22,530 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2019-10-14 21:44:22,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:44:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2019-10-14 21:44:22,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:44:22,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:22,533 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:22,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:22,738 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:22,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1997490476, now seen corresponding path program 9 times [2019-10-14 21:44:22,739 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:22,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340345992] [2019-10-14 21:44:22,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:22,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:22,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:44:22,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340345992] [2019-10-14 21:44:22,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575530610] [2019-10-14 21:44:22,886 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:22,986 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:44:22,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:22,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:44:22,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:44:23,010 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:23,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:44:23,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994967927] [2019-10-14 21:44:23,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:44:23,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:44:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:44:23,012 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 14 states. [2019-10-14 21:44:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:23,105 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2019-10-14 21:44:23,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:44:23,106 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2019-10-14 21:44:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:23,107 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:44:23,107 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:44:23,108 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:44:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:44:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-10-14 21:44:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:44:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-10-14 21:44:23,115 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 42 [2019-10-14 21:44:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:23,116 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-10-14 21:44:23,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:44:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-10-14 21:44:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:44:23,117 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:23,117 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:23,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:23,325 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash 527876658, now seen corresponding path program 10 times [2019-10-14 21:44:23,326 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:23,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828924935] [2019-10-14 21:44:23,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-14 21:44:23,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828924935] [2019-10-14 21:44:23,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176139622] [2019-10-14 21:44:23,471 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:23,527 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:23,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:23,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:44:23,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:44:23,563 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:23,563 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:44:23,563 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747122360] [2019-10-14 21:44:23,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:44:23,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:23,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:44:23,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:44:23,569 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2019-10-14 21:44:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:23,689 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2019-10-14 21:44:23,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:44:23,690 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2019-10-14 21:44:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:23,691 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:44:23,691 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:44:23,692 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:44:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:44:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 21:44:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:44:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-10-14 21:44:23,702 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 45 [2019-10-14 21:44:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:23,702 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-10-14 21:44:23,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:44:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-10-14 21:44:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:44:23,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:23,705 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:23,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:23,916 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:23,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:23,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1374848976, now seen corresponding path program 11 times [2019-10-14 21:44:23,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:23,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722780496] [2019-10-14 21:44:23,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 21:44:24,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722780496] [2019-10-14 21:44:24,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673396944] [2019-10-14 21:44:24,059 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,412 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:44:25,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:25,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:44:25,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 21:44:25,454 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:25,454 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:44:25,455 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258424313] [2019-10-14 21:44:25,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:44:25,455 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:25,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:44:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:44:25,458 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2019-10-14 21:44:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:25,606 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2019-10-14 21:44:25,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:44:25,607 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2019-10-14 21:44:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:25,608 INFO L225 Difference]: With dead ends: 92 [2019-10-14 21:44:25,608 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:44:25,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:44:25,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:44:25,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2019-10-14 21:44:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:44:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-10-14 21:44:25,614 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 48 [2019-10-14 21:44:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:25,614 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-10-14 21:44:25,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:44:25,615 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-10-14 21:44:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:44:25,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:25,616 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:25,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,822 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:25,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:25,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1289950162, now seen corresponding path program 12 times [2019-10-14 21:44:25,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:25,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913683715] [2019-10-14 21:44:25,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:44:25,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913683715] [2019-10-14 21:44:25,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359053579] [2019-10-14 21:44:25,988 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:27,545 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:44:27,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:27,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:44:27,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:44:27,588 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:27,589 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-10-14 21:44:27,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997409527] [2019-10-14 21:44:27,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:44:27,589 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:27,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:44:27,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:44:27,590 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 18 states. [2019-10-14 21:44:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:27,745 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2019-10-14 21:44:27,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:44:27,746 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2019-10-14 21:44:27,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:27,748 INFO L225 Difference]: With dead ends: 103 [2019-10-14 21:44:27,748 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:44:27,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:44:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:44:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2019-10-14 21:44:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 21:44:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2019-10-14 21:44:27,763 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 51 [2019-10-14 21:44:27,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:27,763 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2019-10-14 21:44:27,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:44:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2019-10-14 21:44:27,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:44:27,765 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:27,765 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:27,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:27,972 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:27,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1556118220, now seen corresponding path program 13 times [2019-10-14 21:44:27,972 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:27,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511981275] [2019-10-14 21:44:27,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:27,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:27,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-14 21:44:28,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511981275] [2019-10-14 21:44:28,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372757727] [2019-10-14 21:44:28,144 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:44:28,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-14 21:44:28,223 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:28,223 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:44:28,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136520199] [2019-10-14 21:44:28,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:44:28,224 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:28,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:44:28,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:44:28,225 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 18 states. [2019-10-14 21:44:28,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:28,403 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2019-10-14 21:44:28,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:44:28,403 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2019-10-14 21:44:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:28,404 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:44:28,404 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:44:28,405 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:44:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:44:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-10-14 21:44:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:44:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-10-14 21:44:28,413 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 54 [2019-10-14 21:44:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:28,415 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-10-14 21:44:28,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:44:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-10-14 21:44:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:44:28,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:28,417 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:28,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,628 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:28,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:28,628 INFO L82 PathProgramCache]: Analyzing trace with hash 770750506, now seen corresponding path program 14 times [2019-10-14 21:44:28,628 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:28,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284712101] [2019-10-14 21:44:28,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 21:44:28,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284712101] [2019-10-14 21:44:28,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768561412] [2019-10-14 21:44:28,805 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:28,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:28,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:44:28,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 21:44:28,884 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:28,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:44:28,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885550860] [2019-10-14 21:44:28,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:44:28,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:28,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:44:28,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:44:28,885 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 19 states. [2019-10-14 21:44:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:29,039 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2019-10-14 21:44:29,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:44:29,040 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2019-10-14 21:44:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:29,041 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:44:29,041 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:44:29,042 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:44:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:44:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-10-14 21:44:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:44:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-10-14 21:44:29,046 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 57 [2019-10-14 21:44:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:29,047 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-10-14 21:44:29,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:44:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-10-14 21:44:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:44:29,048 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:29,048 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:29,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:29,254 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:29,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1363570744, now seen corresponding path program 15 times [2019-10-14 21:44:29,255 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:29,256 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685746466] [2019-10-14 21:44:29,256 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:29,257 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:29,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 21:44:29,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685746466] [2019-10-14 21:44:29,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092082388] [2019-10-14 21:44:29,461 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:30,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:44:30,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:30,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:44:30,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 21:44:30,168 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:30,168 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-14 21:44:30,168 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687338182] [2019-10-14 21:44:30,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:44:30,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:30,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:44:30,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:44:30,170 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 20 states. [2019-10-14 21:44:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:30,337 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2019-10-14 21:44:30,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:44:30,342 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2019-10-14 21:44:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:30,343 INFO L225 Difference]: With dead ends: 112 [2019-10-14 21:44:30,343 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 21:44:30,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:44:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 21:44:30,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-10-14 21:44:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 21:44:30,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-10-14 21:44:30,349 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 60 [2019-10-14 21:44:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:30,349 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-10-14 21:44:30,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:44:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-10-14 21:44:30,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:44:30,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:30,350 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:30,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:30,556 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash -938400218, now seen corresponding path program 16 times [2019-10-14 21:44:30,556 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:30,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769876543] [2019-10-14 21:44:30,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:30,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:30,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-14 21:44:30,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769876543] [2019-10-14 21:44:30,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705684167] [2019-10-14 21:44:30,771 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:30,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:30,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:30,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:44:30,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:44:30,882 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:30,882 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:44:30,882 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874789568] [2019-10-14 21:44:30,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:44:30,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:44:30,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:44:30,884 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 21 states. [2019-10-14 21:44:31,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:31,047 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2019-10-14 21:44:31,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:44:31,048 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2019-10-14 21:44:31,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:31,048 INFO L225 Difference]: With dead ends: 117 [2019-10-14 21:44:31,049 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:44:31,049 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:44:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:44:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-14 21:44:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:44:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2019-10-14 21:44:31,053 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2019-10-14 21:44:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:31,053 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2019-10-14 21:44:31,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:44:31,054 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2019-10-14 21:44:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:44:31,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:31,054 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:31,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:31,259 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:31,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:31,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1438435012, now seen corresponding path program 17 times [2019-10-14 21:44:31,259 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:31,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084437202] [2019-10-14 21:44:31,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:31,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:31,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-14 21:44:31,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084437202] [2019-10-14 21:44:31,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985783089] [2019-10-14 21:44:31,498 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:50,346 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 21:44:50,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:50,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:44:50,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-14 21:44:50,404 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:50,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:44:50,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482996711] [2019-10-14 21:44:50,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:44:50,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:44:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:44:50,407 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 22 states. [2019-10-14 21:44:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:50,595 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2019-10-14 21:44:50,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:44:50,596 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2019-10-14 21:44:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:50,597 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:44:50,597 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 21:44:50,597 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:44:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 21:44:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-14 21:44:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:44:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2019-10-14 21:44:50,601 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 66 [2019-10-14 21:44:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:50,602 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2019-10-14 21:44:50,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:44:50,602 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2019-10-14 21:44:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:44:50,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:50,603 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:50,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:50,808 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:50,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1038272990, now seen corresponding path program 18 times [2019-10-14 21:44:50,809 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:50,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141632577] [2019-10-14 21:44:50,810 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:50,810 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:50,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-10-14 21:44:51,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141632577] [2019-10-14 21:44:51,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70435240] [2019-10-14 21:44:51,030 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:58,360 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 21:44:58,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:58,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:44:58,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 18 proven. 324 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-10-14 21:44:58,412 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:58,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2019-10-14 21:44:58,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805704023] [2019-10-14 21:44:58,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:44:58,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:58,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:44:58,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:44:58,414 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 24 states. [2019-10-14 21:44:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:58,538 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2019-10-14 21:44:58,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:44:58,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2019-10-14 21:44:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:58,540 INFO L225 Difference]: With dead ends: 133 [2019-10-14 21:44:58,540 INFO L226 Difference]: Without dead ends: 84 [2019-10-14 21:44:58,541 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:44:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-14 21:44:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2019-10-14 21:44:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:44:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2019-10-14 21:44:58,545 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 69 [2019-10-14 21:44:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:58,545 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2019-10-14 21:44:58,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:44:58,546 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2019-10-14 21:44:58,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 21:44:58,546 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:58,547 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:58,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:58,750 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash 673783744, now seen corresponding path program 19 times [2019-10-14 21:44:58,751 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:58,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839197767] [2019-10-14 21:44:58,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:58,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:58,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-14 21:44:59,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839197767] [2019-10-14 21:44:59,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520293746] [2019-10-14 21:44:59,027 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:59,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:44:59,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-14 21:44:59,128 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:59,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:44:59,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191957862] [2019-10-14 21:44:59,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:44:59,129 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:59,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:44:59,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:44:59,131 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 24 states. [2019-10-14 21:44:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:59,303 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2019-10-14 21:44:59,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:44:59,303 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2019-10-14 21:44:59,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:59,304 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:44:59,304 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 21:44:59,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:44:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 21:44:59,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-10-14 21:44:59,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 21:44:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2019-10-14 21:44:59,309 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2019-10-14 21:44:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:59,310 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2019-10-14 21:44:59,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:44:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2019-10-14 21:44:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-14 21:44:59,310 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:59,311 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:59,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:59,514 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash 624158750, now seen corresponding path program 20 times [2019-10-14 21:44:59,515 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:59,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081044648] [2019-10-14 21:44:59,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:59,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:59,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:44:59,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081044648] [2019-10-14 21:44:59,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623917098] [2019-10-14 21:44:59,761 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:59,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:59,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:59,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:44:59,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:44:59,840 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:59,840 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:44:59,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553405973] [2019-10-14 21:44:59,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:44:59,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:59,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:44:59,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:44:59,842 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 25 states. [2019-10-14 21:45:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:00,032 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2019-10-14 21:45:00,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:45:00,034 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 75 [2019-10-14 21:45:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:00,035 INFO L225 Difference]: With dead ends: 137 [2019-10-14 21:45:00,035 INFO L226 Difference]: Without dead ends: 84 [2019-10-14 21:45:00,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:45:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-14 21:45:00,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-10-14 21:45:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 21:45:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2019-10-14 21:45:00,040 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 75 [2019-10-14 21:45:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:00,040 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2019-10-14 21:45:00,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:45:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2019-10-14 21:45:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:45:00,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:00,041 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:00,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:00,246 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:00,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2065851716, now seen corresponding path program 21 times [2019-10-14 21:45:00,247 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:00,247 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328467482] [2019-10-14 21:45:00,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:00,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:00,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-14 21:45:00,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328467482] [2019-10-14 21:45:00,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178705953] [2019-10-14 21:45:00,547 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:04,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 21:45:04,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:04,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 21:45:04,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-14 21:45:04,181 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:04,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-14 21:45:04,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477648756] [2019-10-14 21:45:04,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:45:04,182 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:04,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:45:04,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:45:04,182 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 26 states. [2019-10-14 21:45:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:04,326 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2019-10-14 21:45:04,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:45:04,327 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2019-10-14 21:45:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:04,328 INFO L225 Difference]: With dead ends: 142 [2019-10-14 21:45:04,328 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 21:45:04,329 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:45:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 21:45:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-10-14 21:45:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:45:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-10-14 21:45:04,333 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 78 [2019-10-14 21:45:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:04,333 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-10-14 21:45:04,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:45:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-10-14 21:45:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:45:04,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:04,334 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:04,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:04,541 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2097923046, now seen corresponding path program 22 times [2019-10-14 21:45:04,543 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:04,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635007963] [2019-10-14 21:45:04,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:04,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:04,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-10-14 21:45:04,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635007963] [2019-10-14 21:45:04,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636658025] [2019-10-14 21:45:04,937 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:05,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:05,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:05,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:45:05,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 21:45:05,084 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:05,084 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:45:05,084 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133696515] [2019-10-14 21:45:05,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:45:05,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:45:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:45:05,086 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 27 states. [2019-10-14 21:45:05,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:05,289 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2019-10-14 21:45:05,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:45:05,290 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 81 [2019-10-14 21:45:05,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:05,290 INFO L225 Difference]: With dead ends: 147 [2019-10-14 21:45:05,291 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:45:05,291 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:45:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:45:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-14 21:45:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 21:45:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2019-10-14 21:45:05,295 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 81 [2019-10-14 21:45:05,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:05,295 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2019-10-14 21:45:05,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:45:05,296 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2019-10-14 21:45:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-14 21:45:05,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:05,297 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:05,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:05,498 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:05,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:05,498 INFO L82 PathProgramCache]: Analyzing trace with hash 322516920, now seen corresponding path program 23 times [2019-10-14 21:45:05,498 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:05,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19387590] [2019-10-14 21:45:05,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:05,499 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:05,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-14 21:45:05,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19387590] [2019-10-14 21:45:05,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985015154] [2019-10-14 21:45:05,866 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true