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_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:42:39,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:42:39,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:42:39,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:42:39,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:42:39,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:42:39,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:42:39,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:42:39,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:42:39,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:42:39,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:42:39,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:42:39,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:42:39,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:42:39,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:42:39,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:42:39,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:42:39,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:42:39,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:42:39,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:42:39,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:42:39,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:42:39,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:42:39,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:42:39,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:42:39,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:42:39,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:42:39,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:42:39,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:42:39,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:42:39,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:42:39,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:42:39,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:42:39,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:42:39,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:42:39,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:42:39,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:42:39,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:42:39,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:42:39,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:42:39,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:42:39,141 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 21:42:39,155 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:42:39,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:42:39,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:42:39,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:42:39,157 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:42:39,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:42:39,157 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:42:39,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:42:39,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:42:39,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:42:39,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:42:39,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:42:39,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:42:39,158 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:42:39,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:42:39,159 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:42:39,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:42:39,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:42:39,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:42:39,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:42:39,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:42:39,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:39,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:42:39,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:42:39,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:42:39,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:42:39,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:42:39,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:42:39,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:42:39,447 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:42:39,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:42:39,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:42:39,465 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:42:39,466 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:42:39,466 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-10-14 21:42:39,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d665d94a0/c101d1c6ec114864bee1f1ffdd4f180a/FLAG8e5e7675d [2019-10-14 21:42:39,972 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:42:39,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-10-14 21:42:39,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d665d94a0/c101d1c6ec114864bee1f1ffdd4f180a/FLAG8e5e7675d [2019-10-14 21:42:40,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d665d94a0/c101d1c6ec114864bee1f1ffdd4f180a [2019-10-14 21:42:40,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:42:40,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:42:40,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:40,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:42:40,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:42:40,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c03921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40, skipping insertion in model container [2019-10-14 21:42:40,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,381 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:42:40,404 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:42:40,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:40,624 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:42:40,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:40,665 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:42:40,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40 WrapperNode [2019-10-14 21:42:40,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:40,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:42:40,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:42:40,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:42:40,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (1/1) ... [2019-10-14 21:42:40,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:42:40,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:42:40,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:42:40,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:42:40,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (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 21:42:40,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:42:40,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:42:40,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:42:40,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:42:40,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:42:40,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:42:40,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:42:40,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:42:40,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:42:40,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:42:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:42:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:42:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:42:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:42:41,179 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:42:41,179 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 21:42:41,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:41 BoogieIcfgContainer [2019-10-14 21:42:41,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:42:41,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:42:41,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:42:41,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:42:41,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:42:40" (1/3) ... [2019-10-14 21:42:41,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417de2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:41, skipping insertion in model container [2019-10-14 21:42:41,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:40" (2/3) ... [2019-10-14 21:42:41,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417de2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:41, skipping insertion in model container [2019-10-14 21:42:41,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:41" (3/3) ... [2019-10-14 21:42:41,189 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2019-10-14 21:42:41,199 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:42:41,214 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:42:41,224 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:42:41,249 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:42:41,249 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:42:41,249 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:42:41,250 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:42:41,250 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:42:41,250 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:42:41,250 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:42:41,250 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:42:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 21:42:41,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:42:41,274 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,274 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,276 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1992705634, now seen corresponding path program 1 times [2019-10-14 21:42:41,287 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670156048] [2019-10-14 21:42:41,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,465 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 21:42:41,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670156048] [2019-10-14 21:42:41,467 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:41,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:42:41,468 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755008721] [2019-10-14 21:42:41,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:42:41,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:42:41,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:41,494 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-14 21:42:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,661 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2019-10-14 21:42:41,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:42:41,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:42:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,677 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:42:41,677 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:42:41,685 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 21:42:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:42:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 21:42:41,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:42:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-14 21:42:41,740 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 15 [2019-10-14 21:42:41,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,741 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-14 21:42:41,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:42:41,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-14 21:42:41,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:42:41,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,743 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,743 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,744 INFO L82 PathProgramCache]: Analyzing trace with hash -2038513977, now seen corresponding path program 1 times [2019-10-14 21:42:41,744 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144360313] [2019-10-14 21:42:41,745 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,745 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,869 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 21:42:41,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144360313] [2019-10-14 21:42:41,870 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:41,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:41,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330421132] [2019-10-14 21:42:41,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:41,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:41,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:41,874 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-10-14 21:42:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,980 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-10-14 21:42:41,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:41,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:42:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,983 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:42:41,983 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:42:41,985 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 21:42:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:42:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:42:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:42:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-10-14 21:42:41,999 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 15 [2019-10-14 21:42:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,999 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-10-14 21:42:41,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-10-14 21:42:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:42:42,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,003 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:42,004 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1204074085, now seen corresponding path program 1 times [2019-10-14 21:42:42,005 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166123690] [2019-10-14 21:42:42,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:42,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166123690] [2019-10-14 21:42:42,078 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:42,078 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:42,078 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749293144] [2019-10-14 21:42:42,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:42,079 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:42,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:42,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:42,080 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2019-10-14 21:42:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:42,180 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2019-10-14 21:42:42,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:42,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 21:42:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:42,183 INFO L225 Difference]: With dead ends: 49 [2019-10-14 21:42:42,183 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:42:42,184 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 21:42:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:42:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-10-14 21:42:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:42:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-14 21:42:42,192 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2019-10-14 21:42:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:42,192 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-14 21:42:42,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-14 21:42:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:42:42,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,194 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:42,194 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,194 INFO L82 PathProgramCache]: Analyzing trace with hash -489632055, now seen corresponding path program 1 times [2019-10-14 21:42:42,195 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460334235] [2019-10-14 21:42:42,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,196 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:42,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460334235] [2019-10-14 21:42:42,292 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:42,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:42,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892333545] [2019-10-14 21:42:42,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:42,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:42,295 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2019-10-14 21:42:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:42,395 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-14 21:42:42,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:42,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 21:42:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:42,397 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:42:42,397 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:42:42,415 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 21:42:42,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:42:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-10-14 21:42:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:42:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-10-14 21:42:42,428 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2019-10-14 21:42:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:42,429 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-10-14 21:42:42,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-10-14 21:42:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:42:42,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,432 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:42,433 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,433 INFO L82 PathProgramCache]: Analyzing trace with hash -882659065, now seen corresponding path program 1 times [2019-10-14 21:42:42,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617478085] [2019-10-14 21:42:42,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,550 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 21:42:42,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617478085] [2019-10-14 21:42:42,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880646306] [2019-10-14 21:42:42,551 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 21:42:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:42,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:42,647 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 21:42:42,648 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:42,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:42:42,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203920019] [2019-10-14 21:42:42,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:42:42,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:42,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:42:42,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:42,650 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 6 states. [2019-10-14 21:42:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:42,734 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2019-10-14 21:42:42,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:42:42,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:42:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:42,736 INFO L225 Difference]: With dead ends: 64 [2019-10-14 21:42:42,736 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:42:42,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 21:42:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:42:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-10-14 21:42:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:42:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-10-14 21:42:42,743 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 20 [2019-10-14 21:42:42,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:42,743 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-10-14 21:42:42,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:42:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-10-14 21:42:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:42:42,745 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,745 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:42,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,950 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1747071959, now seen corresponding path program 2 times [2019-10-14 21:42:42,952 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009408334] [2019-10-14 21:42:42,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:42:43,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009408334] [2019-10-14 21:42:43,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13097421] [2019-10-14 21:42:43,065 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 21:42:43,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:43,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:43,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:43,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:43,140 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:43,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-14 21:42:43,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450480122] [2019-10-14 21:42:43,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:42:43,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:43,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:42:43,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:43,142 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 8 states. [2019-10-14 21:42:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:43,257 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2019-10-14 21:42:43,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:42:43,257 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-10-14 21:42:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:43,258 INFO L225 Difference]: With dead ends: 75 [2019-10-14 21:42:43,259 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:42:43,259 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:42:43,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:42:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2019-10-14 21:42:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:42:43,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-14 21:42:43,266 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 22 [2019-10-14 21:42:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:43,266 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-14 21:42:43,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:42:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-14 21:42:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:42:43,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:43,268 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:43,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,471 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:43,472 INFO L82 PathProgramCache]: Analyzing trace with hash 523443937, now seen corresponding path program 3 times [2019-10-14 21:42:43,472 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:43,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309535621] [2019-10-14 21:42:43,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:43,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309535621] [2019-10-14 21:42:43,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205059219] [2019-10-14 21:42:43,576 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 21:42:43,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:42:43,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:43,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:43,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:43,651 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:43,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:42:43,652 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366482106] [2019-10-14 21:42:43,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:42:43,653 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:43,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:42:43,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:43,654 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 7 states. [2019-10-14 21:42:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:43,746 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2019-10-14 21:42:43,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:42:43,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-10-14 21:42:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:43,748 INFO L225 Difference]: With dead ends: 73 [2019-10-14 21:42:43,748 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:42:43,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 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 21:42:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:42:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-10-14 21:42:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:42:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2019-10-14 21:42:43,766 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 27 [2019-10-14 21:42:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:43,767 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2019-10-14 21:42:43,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:42:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2019-10-14 21:42:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:42:43,769 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:43,769 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:43,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,974 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:43,974 INFO L82 PathProgramCache]: Analyzing trace with hash -994793717, now seen corresponding path program 4 times [2019-10-14 21:42:43,974 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:43,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393569940] [2019-10-14 21:42:43,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:42:44,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393569940] [2019-10-14 21:42:44,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637050733] [2019-10-14 21:42:44,106 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 21:42:44,164 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:44,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:44,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:44,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:42:44,184 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:44,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:42:44,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741459021] [2019-10-14 21:42:44,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:42:44,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:42:44,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:44,186 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 8 states. [2019-10-14 21:42:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,288 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2019-10-14 21:42:44,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:42:44,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-10-14 21:42:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,289 INFO L225 Difference]: With dead ends: 90 [2019-10-14 21:42:44,290 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:42:44,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 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 21:42:44,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:42:44,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-10-14 21:42:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:42:44,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2019-10-14 21:42:44,297 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 30 [2019-10-14 21:42:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:44,297 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2019-10-14 21:42:44,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:42:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2019-10-14 21:42:44,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:42:44,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,299 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:44,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,506 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1511473235, now seen corresponding path program 5 times [2019-10-14 21:42:44,506 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:44,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885464262] [2019-10-14 21:42:44,507 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,507 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:42:44,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885464262] [2019-10-14 21:42:44,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222108980] [2019-10-14 21:42:44,598 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 21:42:44,760 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 21:42:44,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:44,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:44,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:42:44,776 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:44,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:42:44,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202992197] [2019-10-14 21:42:44,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:42:44,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:42:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:44,778 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 8 states. [2019-10-14 21:42:44,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,864 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2019-10-14 21:42:44,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:42:44,864 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-10-14 21:42:44,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,865 INFO L225 Difference]: With dead ends: 81 [2019-10-14 21:42:44,866 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:42:44,866 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 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 21:42:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:42:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-10-14 21:42:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:42:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2019-10-14 21:42:44,872 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2019-10-14 21:42:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:44,873 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2019-10-14 21:42:44,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:42:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2019-10-14 21:42:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:42:44,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,874 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,076 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash 251118271, now seen corresponding path program 6 times [2019-10-14 21:42:45,077 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133893353] [2019-10-14 21:42:45,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,078 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:42:45,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133893353] [2019-10-14 21:42:45,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967790347] [2019-10-14 21:42:45,171 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 21:42:45,250 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:42:45,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:45,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:42:45,318 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,318 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-10-14 21:42:45,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943128423] [2019-10-14 21:42:45,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:45,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:45,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:45,319 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 13 states. [2019-10-14 21:42:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:45,469 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2019-10-14 21:42:45,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:45,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2019-10-14 21:42:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:45,470 INFO L225 Difference]: With dead ends: 114 [2019-10-14 21:42:45,470 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:42:45,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:42:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2019-10-14 21:42:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:42:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2019-10-14 21:42:45,478 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 35 [2019-10-14 21:42:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:45,478 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2019-10-14 21:42:45,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2019-10-14 21:42:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:42:45,479 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:45,480 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,683 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2082970353, now seen corresponding path program 7 times [2019-10-14 21:42:45,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209360864] [2019-10-14 21:42:45,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:42:45,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209360864] [2019-10-14 21:42:45,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487493974] [2019-10-14 21:42:45,797 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 21:42:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:42:45,922 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,922 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-10-14 21:42:45,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741406280] [2019-10-14 21:42:45,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:42:45,923 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:42:45,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:42:45,924 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 15 states. [2019-10-14 21:42:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,101 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2019-10-14 21:42:46,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:42:46,102 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2019-10-14 21:42:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,103 INFO L225 Difference]: With dead ends: 128 [2019-10-14 21:42:46,103 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:42:46,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:42:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2019-10-14 21:42:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:42:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2019-10-14 21:42:46,110 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2019-10-14 21:42:46,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,111 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2019-10-14 21:42:46,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:42:46,111 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2019-10-14 21:42:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:42:46,112 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,112 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:46,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,322 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:46,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1851984059, now seen corresponding path program 8 times [2019-10-14 21:42:46,322 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:46,323 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395910345] [2019-10-14 21:42:46,323 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,323 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:42:46,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395910345] [2019-10-14 21:42:46,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158942010] [2019-10-14 21:42:46,436 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 21:42:46,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:46,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:46,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:46,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:42:46,617 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:46,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-10-14 21:42:46,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480643555] [2019-10-14 21:42:46,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:46,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:46,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:46,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:46,621 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 17 states. [2019-10-14 21:42:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,884 INFO L93 Difference]: Finished difference Result 142 states and 182 transitions. [2019-10-14 21:42:46,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:42:46,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2019-10-14 21:42:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,886 INFO L225 Difference]: With dead ends: 142 [2019-10-14 21:42:46,886 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 21:42:46,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:42:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 21:42:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2019-10-14 21:42:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:42:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2019-10-14 21:42:46,904 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 45 [2019-10-14 21:42:46,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,905 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2019-10-14 21:42:46,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2019-10-14 21:42:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:42:46,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,912 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:47,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,113 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:47,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2023959315, now seen corresponding path program 9 times [2019-10-14 21:42:47,114 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:47,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294827909] [2019-10-14 21:42:47,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-14 21:42:47,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294827909] [2019-10-14 21:42:47,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898856896] [2019-10-14 21:42:47,224 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 21:42:47,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:42:47,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:47,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:42:47,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:42:47,971 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:47,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-10-14 21:42:47,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370354506] [2019-10-14 21:42:47,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:47,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:47,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:47,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:47,972 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand 19 states. [2019-10-14 21:42:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:48,289 INFO L93 Difference]: Finished difference Result 156 states and 200 transitions. [2019-10-14 21:42:48,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:42:48,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2019-10-14 21:42:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:48,291 INFO L225 Difference]: With dead ends: 156 [2019-10-14 21:42:48,291 INFO L226 Difference]: Without dead ends: 95 [2019-10-14 21:42:48,292 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:42:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-14 21:42:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2019-10-14 21:42:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:42:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2019-10-14 21:42:48,298 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 50 [2019-10-14 21:42:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:48,298 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2019-10-14 21:42:48,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2019-10-14 21:42:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:42:48,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:48,300 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:48,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:48,506 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:48,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:48,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1568482999, now seen corresponding path program 10 times [2019-10-14 21:42:48,507 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:48,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594821758] [2019-10-14 21:42:48,507 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:42:48,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594821758] [2019-10-14 21:42:48,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773351122] [2019-10-14 21:42:48,619 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 21:42:48,690 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:48,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:48,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:48,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:42:48,845 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:48,845 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-10-14 21:42:48,845 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945589505] [2019-10-14 21:42:48,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:42:48,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:48,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:42:48,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:48,846 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand 21 states. [2019-10-14 21:42:49,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:49,103 INFO L93 Difference]: Finished difference Result 170 states and 218 transitions. [2019-10-14 21:42:49,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:42:49,103 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2019-10-14 21:42:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:49,104 INFO L225 Difference]: With dead ends: 170 [2019-10-14 21:42:49,104 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 21:42:49,105 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:42:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 21:42:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2019-10-14 21:42:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 21:42:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2019-10-14 21:42:49,111 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 55 [2019-10-14 21:42:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:49,112 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2019-10-14 21:42:49,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:42:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2019-10-14 21:42:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:42:49,113 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:49,113 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:49,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,324 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash -622249705, now seen corresponding path program 11 times [2019-10-14 21:42:49,325 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:49,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627611507] [2019-10-14 21:42:49,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:42:49,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627611507] [2019-10-14 21:42:49,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257023639] [2019-10-14 21:42:49,461 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 21:42:54,222 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 21:42:54,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:54,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:42:54,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:42:54,248 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:54,248 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:42:54,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207264089] [2019-10-14 21:42:54,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:54,249 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:54,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:54,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:54,250 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand 14 states. [2019-10-14 21:42:54,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:54,391 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2019-10-14 21:42:54,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:54,392 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2019-10-14 21:42:54,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:54,394 INFO L225 Difference]: With dead ends: 127 [2019-10-14 21:42:54,394 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 21:42:54,395 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 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 21:42:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 21:42:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2019-10-14 21:42:54,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-14 21:42:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2019-10-14 21:42:54,400 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 60 [2019-10-14 21:42:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:54,401 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2019-10-14 21:42:54,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2019-10-14 21:42:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:42:54,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:54,402 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:54,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:54,610 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:54,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:54,610 INFO L82 PathProgramCache]: Analyzing trace with hash -248981227, now seen corresponding path program 12 times [2019-10-14 21:42:54,611 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:54,611 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129780445] [2019-10-14 21:42:54,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:42:54,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129780445] [2019-10-14 21:42:54,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423177655] [2019-10-14 21:42:54,749 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 21:42:57,785 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 21:42:57,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:57,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:42:57,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-14 21:42:57,921 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:57,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2019-10-14 21:42:57,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345679319] [2019-10-14 21:42:57,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:42:57,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:57,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:42:57,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:42:57,923 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand 24 states. [2019-10-14 21:42:58,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:58,224 INFO L93 Difference]: Finished difference Result 196 states and 252 transitions. [2019-10-14 21:42:58,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:42:58,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2019-10-14 21:42:58,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:58,227 INFO L225 Difference]: With dead ends: 196 [2019-10-14 21:42:58,227 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 21:42:58,228 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=375, Invalid=747, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:42:58,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 21:42:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2019-10-14 21:42:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-14 21:42:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2019-10-14 21:42:58,234 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 63 [2019-10-14 21:42:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:58,234 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2019-10-14 21:42:58,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:42:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2019-10-14 21:42:58,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 21:42:58,235 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:58,235 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:58,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:58,441 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:58,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1971306503, now seen corresponding path program 13 times [2019-10-14 21:42:58,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:58,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7519988] [2019-10-14 21:42:58,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:58,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:58,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-14 21:42:58,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7519988] [2019-10-14 21:42:58,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687379711] [2019-10-14 21:42:58,718 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 21:42:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:58,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-14 21:42:58,989 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:58,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2019-10-14 21:42:58,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49825635] [2019-10-14 21:42:58,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:42:58,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:58,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:42:58,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:58,991 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand 26 states. [2019-10-14 21:42:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:59,274 INFO L93 Difference]: Finished difference Result 210 states and 270 transitions. [2019-10-14 21:42:59,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:42:59,274 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 68 [2019-10-14 21:42:59,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:59,275 INFO L225 Difference]: With dead ends: 210 [2019-10-14 21:42:59,276 INFO L226 Difference]: Without dead ends: 125 [2019-10-14 21:42:59,277 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:42:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-14 21:42:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2019-10-14 21:42:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-10-14 21:42:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 149 transitions. [2019-10-14 21:42:59,282 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 149 transitions. Word has length 68 [2019-10-14 21:42:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:59,283 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 149 transitions. [2019-10-14 21:42:59,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:42:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 149 transitions. [2019-10-14 21:42:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:42:59,284 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:59,284 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:59,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:59,488 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:59,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1113238383, now seen corresponding path program 14 times [2019-10-14 21:42:59,489 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:59,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536999497] [2019-10-14 21:42:59,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:59,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:59,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 21:42:59,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536999497] [2019-10-14 21:42:59,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153989505] [2019-10-14 21:42:59,687 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 21:42:59,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:59,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:59,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:42:59,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-14 21:42:59,951 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:59,951 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2019-10-14 21:42:59,952 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786556528] [2019-10-14 21:42:59,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:42:59,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:59,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:42:59,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:42:59,953 INFO L87 Difference]: Start difference. First operand 120 states and 149 transitions. Second operand 28 states. [2019-10-14 21:43:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:00,323 INFO L93 Difference]: Finished difference Result 224 states and 288 transitions. [2019-10-14 21:43:00,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:43:00,324 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2019-10-14 21:43:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:00,325 INFO L225 Difference]: With dead ends: 224 [2019-10-14 21:43:00,326 INFO L226 Difference]: Without dead ends: 133 [2019-10-14 21:43:00,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=521, Invalid=1039, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:43:00,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-14 21:43:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2019-10-14 21:43:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-10-14 21:43:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 159 transitions. [2019-10-14 21:43:00,332 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 159 transitions. Word has length 73 [2019-10-14 21:43:00,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:00,332 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 159 transitions. [2019-10-14 21:43:00,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:43:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 159 transitions. [2019-10-14 21:43:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:43:00,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:00,333 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:00,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:00,534 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:00,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash 41984125, now seen corresponding path program 15 times [2019-10-14 21:43:00,535 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:00,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680873407] [2019-10-14 21:43:00,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:00,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:00,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:43:00,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680873407] [2019-10-14 21:43:00,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134110257] [2019-10-14 21:43:00,746 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 21:43:13,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-10-14 21:43:13,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:13,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:43:13,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-10-14 21:43:13,800 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:13,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2019-10-14 21:43:13,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931489389] [2019-10-14 21:43:13,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:43:13,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:13,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:43:13,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:43:13,802 INFO L87 Difference]: Start difference. First operand 128 states and 159 transitions. Second operand 30 states. [2019-10-14 21:43:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:14,208 INFO L93 Difference]: Finished difference Result 238 states and 306 transitions. [2019-10-14 21:43:14,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:43:14,208 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 78 [2019-10-14 21:43:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:14,210 INFO L225 Difference]: With dead ends: 238 [2019-10-14 21:43:14,210 INFO L226 Difference]: Without dead ends: 141 [2019-10-14 21:43:14,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:43:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-14 21:43:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2019-10-14 21:43:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-14 21:43:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 169 transitions. [2019-10-14 21:43:14,217 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 169 transitions. Word has length 78 [2019-10-14 21:43:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:14,217 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 169 transitions. [2019-10-14 21:43:14,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:43:14,217 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 169 transitions. [2019-10-14 21:43:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:43:14,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:14,218 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:14,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:14,430 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:14,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1762199565, now seen corresponding path program 16 times [2019-10-14 21:43:14,431 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:14,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839070646] [2019-10-14 21:43:14,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-14 21:43:14,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839070646] [2019-10-14 21:43:14,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637488346] [2019-10-14 21:43:14,627 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 21:43:14,751 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:14,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:14,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:43:14,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-14 21:43:14,776 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:14,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:43:14,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044428238] [2019-10-14 21:43:14,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:43:14,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:14,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:43:14,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:43:14,777 INFO L87 Difference]: Start difference. First operand 136 states and 169 transitions. Second operand 18 states. [2019-10-14 21:43:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:14,915 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2019-10-14 21:43:14,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:43:14,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2019-10-14 21:43:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:14,917 INFO L225 Difference]: With dead ends: 242 [2019-10-14 21:43:14,918 INFO L226 Difference]: Without dead ends: 139 [2019-10-14 21:43:14,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 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 21:43:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-14 21:43:14,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-10-14 21:43:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-10-14 21:43:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 171 transitions. [2019-10-14 21:43:14,924 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 171 transitions. Word has length 83 [2019-10-14 21:43:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:14,924 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 171 transitions. [2019-10-14 21:43:14,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:43:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 171 transitions. [2019-10-14 21:43:14,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-14 21:43:14,926 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:14,926 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:15,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:15,131 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:15,131 INFO L82 PathProgramCache]: Analyzing trace with hash -107343701, now seen corresponding path program 17 times [2019-10-14 21:43:15,131 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:15,132 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392757486] [2019-10-14 21:43:15,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 21:43:15,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392757486] [2019-10-14 21:43:15,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306737115] [2019-10-14 21:43:15,375 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