java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/mapavg1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:40:12,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:40:12,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:40:12,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:40:12,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:40:12,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:40:12,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:40:12,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:40:12,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:40:12,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:40:12,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:40:12,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:40:12,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:40:12,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:40:12,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:40:12,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:40:12,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:40:12,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:40:12,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:40:12,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:40:12,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:40:12,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:40:12,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:40:12,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:40:12,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:40:12,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:40:12,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:40:12,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:40:12,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:40:12,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:40:12,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:40:12,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:40:12,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:40:12,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:40:12,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:40:12,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:40:12,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:40:12,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:40:12,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:40:12,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:40:12,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:40:12,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:40:12,274 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:40:12,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:40:12,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:40:12,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:40:12,275 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:40:12,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:40:12,276 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:40:12,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:40:12,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:40:12,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:40:12,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:40:12,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:40:12,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:40:12,280 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:40:12,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:40:12,280 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:40:12,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:40:12,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:40:12,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:40:12,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:40:12,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:40:12,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:40:12,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:40:12,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:40:12,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:40:12,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:40:12,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:40:12,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:40:12,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:40:12,541 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:40:12,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:40:12,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:40:12,562 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:40:12,562 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:40:12,563 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg1.i [2019-10-14 21:40:12,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ec5eb80e/3e9d5fd694c146dd9808738fe2ba26de/FLAG1c8bddd8b [2019-10-14 21:40:13,076 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:40:13,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg1.i [2019-10-14 21:40:13,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ec5eb80e/3e9d5fd694c146dd9808738fe2ba26de/FLAG1c8bddd8b [2019-10-14 21:40:13,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ec5eb80e/3e9d5fd694c146dd9808738fe2ba26de [2019-10-14 21:40:13,474 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:40:13,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:40:13,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:13,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:40:13,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:40:13,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db268e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13, skipping insertion in model container [2019-10-14 21:40:13,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,492 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:40:13,509 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:40:13,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:13,694 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:40:13,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:40:13,821 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:40:13,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13 WrapperNode [2019-10-14 21:40:13,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:40:13,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:40:13,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:40:13,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:40:13,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... [2019-10-14 21:40:13,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:40:13,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:40:13,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:40:13,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:40:13,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:40:13,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:40:13,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:40:13,922 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2019-10-14 21:40:13,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:40:13,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:40:13,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:40:13,922 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2019-10-14 21:40:13,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:40:13,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:40:13,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:40:13,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:40:13,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:40:13,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:40:13,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:40:14,234 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:40:14,234 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:40:14,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:14 BoogieIcfgContainer [2019-10-14 21:40:14,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:40:14,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:40:14,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:40:14,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:40:14,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:40:13" (1/3) ... [2019-10-14 21:40:14,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc10270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:14, skipping insertion in model container [2019-10-14 21:40:14,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:40:13" (2/3) ... [2019-10-14 21:40:14,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc10270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:40:14, skipping insertion in model container [2019-10-14 21:40:14,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:40:14" (3/3) ... [2019-10-14 21:40:14,244 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2019-10-14 21:40:14,253 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:40:14,262 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:40:14,273 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:40:14,298 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:40:14,298 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:40:14,298 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:40:14,298 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:40:14,299 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:40:14,299 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:40:14,299 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:40:14,299 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:40:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 21:40:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:40:14,320 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:14,320 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:14,322 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1234592251, now seen corresponding path program 1 times [2019-10-14 21:40:14,333 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:14,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812426934] [2019-10-14 21:40:14,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:14,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:14,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:40:14,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812426934] [2019-10-14 21:40:14,572 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:40:14,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:40:14,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974206861] [2019-10-14 21:40:14,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:14,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:14,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:14,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:40:14,605 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 21:40:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:14,722 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-14 21:40:14,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:14,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:40:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:14,733 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:40:14,734 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:40:14,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:40:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:40:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:40:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:40:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:40:14,796 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-14 21:40:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:14,796 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:40:14,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:40:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:40:14,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:14,801 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:14,802 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1054720325, now seen corresponding path program 1 times [2019-10-14 21:40:14,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:14,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012568566] [2019-10-14 21:40:14,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:14,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:14,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:40:14,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012568566] [2019-10-14 21:40:14,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213426075] [2019-10-14 21:40:14,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:40:15,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:40:15,083 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:40:15,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:40:15,084 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546886054] [2019-10-14 21:40:15,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:15,086 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:15,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:15,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:40:15,087 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-14 21:40:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:15,100 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-14 21:40:15,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:15,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 21:40:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:15,102 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:40:15,102 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:40:15,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:40:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:40:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 21:40:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:40:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 21:40:15,111 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-14 21:40:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:15,112 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 21:40:15,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 21:40:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:40:15,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:15,114 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:15,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:15,318 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:15,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1286970653, now seen corresponding path program 1 times [2019-10-14 21:40:15,321 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:15,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74205961] [2019-10-14 21:40:15,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:40:15,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74205961] [2019-10-14 21:40:15,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106928890] [2019-10-14 21:40:15,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:40:15,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:40:15,584 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:40:15,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 21:40:15,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072609388] [2019-10-14 21:40:15,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:15,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:15,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:15,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:40:15,586 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-14 21:40:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:15,605 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-14 21:40:15,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:15,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 21:40:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:15,607 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:40:15,607 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:40:15,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:40:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:40:15,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 21:40:15,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:40:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 21:40:15,621 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-14 21:40:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:15,621 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 21:40:15,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 21:40:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:40:15,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:15,626 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:15,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:15,831 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:15,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:15,832 INFO L82 PathProgramCache]: Analyzing trace with hash -631694085, now seen corresponding path program 1 times [2019-10-14 21:40:15,833 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:15,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083793307] [2019-10-14 21:40:15,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:15,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:40:15,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083793307] [2019-10-14 21:40:15,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137374284] [2019-10-14 21:40:15,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 21:40:16,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:40:16,023 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:40:16,024 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:40:16,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833003116] [2019-10-14 21:40:16,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:40:16,025 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:16,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:40:16,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:16,025 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-14 21:40:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:16,044 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-14 21:40:16,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:40:16,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-14 21:40:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:16,046 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:40:16,046 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:40:16,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:16,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:40:16,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:40:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:40:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 21:40:16,056 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-14 21:40:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:16,060 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 21:40:16,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:40:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 21:40:16,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:40:16,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:16,064 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:16,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:16,265 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:16,266 INFO L82 PathProgramCache]: Analyzing trace with hash -490156423, now seen corresponding path program 1 times [2019-10-14 21:40:16,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:16,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528055242] [2019-10-14 21:40:16,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:40:16,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528055242] [2019-10-14 21:40:16,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666405419] [2019-10-14 21:40:16,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:40:16,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 21:40:16,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:16,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-14 21:40:16,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222010379] [2019-10-14 21:40:16,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:40:16,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:16,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:40:16,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:40:16,501 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-14 21:40:16,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:16,625 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-14 21:40:16,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:40:16,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-14 21:40:16,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:16,627 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:40:16,627 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:40:16,627 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:40:16,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:40:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-14 21:40:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:40:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 21:40:16,634 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-14 21:40:16,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:16,634 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 21:40:16,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:40:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 21:40:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:40:16,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:16,636 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:16,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:16,840 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:16,840 INFO L82 PathProgramCache]: Analyzing trace with hash -170749255, now seen corresponding path program 2 times [2019-10-14 21:40:16,841 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:16,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873770565] [2019-10-14 21:40:16,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:16,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:40:16,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873770565] [2019-10-14 21:40:16,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564721875] [2019-10-14 21:40:16,940 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:16,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:16,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:17,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:40:17,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:40:17,027 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:17,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:40:17,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525022873] [2019-10-14 21:40:17,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:40:17,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:40:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:17,030 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-14 21:40:17,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:17,126 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 21:40:17,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:40:17,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 21:40:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:17,128 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:40:17,128 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:40:17,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:40:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:40:17,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 21:40:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:40:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-14 21:40:17,142 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-14 21:40:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:17,143 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-14 21:40:17,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:40:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-14 21:40:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:40:17,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:17,148 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:17,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:17,349 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:17,350 INFO L82 PathProgramCache]: Analyzing trace with hash 767810715, now seen corresponding path program 3 times [2019-10-14 21:40:17,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:17,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685778483] [2019-10-14 21:40:17,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:40:17,453 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685778483] [2019-10-14 21:40:17,453 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864983103] [2019-10-14 21:40:17,453 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:17,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:40:17,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:17,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:40:17,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 21:40:17,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:17,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 21:40:17,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674506864] [2019-10-14 21:40:17,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:40:17,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:17,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:40:17,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:17,544 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-14 21:40:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:17,646 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-14 21:40:17,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:40:17,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 21:40:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:17,648 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:40:17,649 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:40:17,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:17,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:40:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-14 21:40:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:40:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-14 21:40:17,661 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-14 21:40:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:17,663 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-14 21:40:17,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:40:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-14 21:40:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:40:17,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:17,666 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:17,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:17,867 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:17,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:17,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1024452869, now seen corresponding path program 4 times [2019-10-14 21:40:17,868 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:17,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218081747] [2019-10-14 21:40:17,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:17,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:40:17,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218081747] [2019-10-14 21:40:17,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604128377] [2019-10-14 21:40:17,994 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:18,052 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:18,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:18,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:40:18,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:40:18,087 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:18,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:40:18,087 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755768029] [2019-10-14 21:40:18,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:40:18,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:18,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:40:18,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:18,089 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-14 21:40:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:18,179 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-14 21:40:18,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:40:18,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-14 21:40:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:18,180 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:40:18,180 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:40:18,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:40:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:40:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:40:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:40:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 21:40:18,191 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-14 21:40:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:18,191 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 21:40:18,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:40:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 21:40:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:40:18,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:18,197 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:18,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:18,403 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:18,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:18,403 INFO L82 PathProgramCache]: Analyzing trace with hash -599330979, now seen corresponding path program 5 times [2019-10-14 21:40:18,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:18,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862410095] [2019-10-14 21:40:18,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:18,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:18,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:40:18,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862410095] [2019-10-14 21:40:18,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914312097] [2019-10-14 21:40:18,520 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:18,619 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:40:18,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:18,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:40:18,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:40:18,695 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:18,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:40:18,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066147229] [2019-10-14 21:40:18,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:40:18,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:18,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:40:18,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:40:18,697 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-14 21:40:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:18,877 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-14 21:40:18,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:40:18,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-14 21:40:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:18,879 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:40:18,879 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:40:18,880 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:40:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:40:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 21:40:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:40:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-14 21:40:18,891 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-14 21:40:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:18,891 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-14 21:40:18,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:40:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-14 21:40:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:40:18,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:18,893 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:19,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:19,094 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:19,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:19,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1877447581, now seen corresponding path program 6 times [2019-10-14 21:40:19,094 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:19,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023699643] [2019-10-14 21:40:19,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-14 21:40:19,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023699643] [2019-10-14 21:40:19,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726208009] [2019-10-14 21:40:19,195 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:19,266 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:40:19,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:19,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:40:19,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-14 21:40:19,325 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:19,325 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 21:40:19,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293824096] [2019-10-14 21:40:19,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:40:19,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:19,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:40:19,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:40:19,327 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-14 21:40:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:19,504 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-14 21:40:19,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:40:19,504 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 21:40:19,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:19,505 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:40:19,505 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:40:19,506 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:40:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:40:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-14 21:40:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:40:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-14 21:40:19,512 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-14 21:40:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:19,512 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-14 21:40:19,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:40:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-14 21:40:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:40:19,513 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:19,514 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:19,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:19,718 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:19,719 INFO L82 PathProgramCache]: Analyzing trace with hash -611990051, now seen corresponding path program 7 times [2019-10-14 21:40:19,719 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:19,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548518148] [2019-10-14 21:40:19,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:19,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:19,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:19,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548518148] [2019-10-14 21:40:19,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624647688] [2019-10-14 21:40:19,854 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:19,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:40:19,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:19,932 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:19,933 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:40:19,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075612162] [2019-10-14 21:40:19,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:40:19,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:40:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:40:19,934 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-14 21:40:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:20,006 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-14 21:40:20,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:40:20,007 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-14 21:40:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:20,008 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:40:20,008 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:40:20,009 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:40:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:40:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 21:40:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:40:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-14 21:40:20,014 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-14 21:40:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:20,015 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-14 21:40:20,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:40:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-14 21:40:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:40:20,016 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:20,016 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:20,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:20,226 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:20,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:20,226 INFO L82 PathProgramCache]: Analyzing trace with hash 152046015, now seen corresponding path program 8 times [2019-10-14 21:40:20,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:20,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486233454] [2019-10-14 21:40:20,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:20,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:20,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:20,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486233454] [2019-10-14 21:40:20,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489890398] [2019-10-14 21:40:20,348 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:20,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:20,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:20,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:40:20,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:20,432 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:20,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:40:20,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416500118] [2019-10-14 21:40:20,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:40:20,433 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:20,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:40:20,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:40:20,433 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-14 21:40:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:20,522 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-14 21:40:20,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:40:20,522 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-14 21:40:20,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:20,523 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:40:20,523 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:40:20,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:40:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:40:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 21:40:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:40:20,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-14 21:40:20,529 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-14 21:40:20,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:20,530 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-14 21:40:20,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:40:20,530 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-14 21:40:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:40:20,531 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:20,531 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:20,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:20,734 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:20,735 INFO L82 PathProgramCache]: Analyzing trace with hash -48702175, now seen corresponding path program 9 times [2019-10-14 21:40:20,735 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:20,736 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991410025] [2019-10-14 21:40:20,736 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:20,736 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:20,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 21:40:20,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991410025] [2019-10-14 21:40:20,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330838133] [2019-10-14 21:40:20,873 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:20,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:40:20,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:20,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:40:20,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-14 21:40:21,001 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:21,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 21:40:21,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579754210] [2019-10-14 21:40:21,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:40:21,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:40:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:40:21,006 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-14 21:40:21,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:21,177 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-14 21:40:21,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:40:21,178 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-14 21:40:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:21,179 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:40:21,179 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:40:21,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:40:21,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:40:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 21:40:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:40:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-14 21:40:21,186 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-14 21:40:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:21,186 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-14 21:40:21,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:40:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-14 21:40:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 21:40:21,187 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:21,187 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:21,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:21,402 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:21,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1677678719, now seen corresponding path program 10 times [2019-10-14 21:40:21,402 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:21,402 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260749084] [2019-10-14 21:40:21,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:21,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:21,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-14 21:40:21,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260749084] [2019-10-14 21:40:21,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723024069] [2019-10-14 21:40:21,558 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:21,644 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:21,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:21,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:40:21,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-14 21:40:21,731 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:21,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-14 21:40:21,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798444658] [2019-10-14 21:40:21,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:40:21,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:21,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:40:21,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:40:21,733 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-14 21:40:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:21,997 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-14 21:40:22,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:40:22,001 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-14 21:40:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:22,002 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:40:22,003 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:40:22,003 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:40:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-14 21:40:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:40:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-14 21:40:22,009 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-14 21:40:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:22,009 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-14 21:40:22,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:40:22,010 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-14 21:40:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 21:40:22,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:22,011 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:22,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:22,215 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash 531544513, now seen corresponding path program 11 times [2019-10-14 21:40:22,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:22,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629263935] [2019-10-14 21:40:22,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:22,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:22,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-14 21:40:22,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629263935] [2019-10-14 21:40:22,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140567032] [2019-10-14 21:40:22,402 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:22,842 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:40:22,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:22,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:40:22,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 21:40:22,975 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:22,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-14 21:40:22,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062758287] [2019-10-14 21:40:22,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:40:22,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:22,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:40:22,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:40:22,978 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-14 21:40:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:23,278 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-14 21:40:23,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:40:23,278 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-14 21:40:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:23,279 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:40:23,279 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:40:23,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:40:23,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:40:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-14 21:40:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:40:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-14 21:40:23,290 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-14 21:40:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:23,290 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-14 21:40:23,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:40:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-14 21:40:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:40:23,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:23,291 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:23,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:23,496 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash 24697345, now seen corresponding path program 12 times [2019-10-14 21:40:23,497 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:23,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677044818] [2019-10-14 21:40:23,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:23,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:23,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 21:40:23,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677044818] [2019-10-14 21:40:23,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282939030] [2019-10-14 21:40:23,677 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:23,903 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:40:23,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:23,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:40:23,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-14 21:40:23,973 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:23,973 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 21:40:23,973 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838411016] [2019-10-14 21:40:23,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:40:23,974 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:23,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:40:23,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:40:23,975 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-14 21:40:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:24,149 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-14 21:40:24,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:40:24,150 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-14 21:40:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:24,151 INFO L225 Difference]: With dead ends: 105 [2019-10-14 21:40:24,151 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:40:24,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:40:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:40:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-14 21:40:24,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 21:40:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-14 21:40:24,156 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-14 21:40:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:24,157 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-14 21:40:24,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:40:24,157 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-14 21:40:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 21:40:24,158 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:24,158 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:24,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:24,363 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash -564086943, now seen corresponding path program 13 times [2019-10-14 21:40:24,363 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:24,363 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257333301] [2019-10-14 21:40:24,363 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:24,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:24,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:24,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257333301] [2019-10-14 21:40:24,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836496108] [2019-10-14 21:40:24,604 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:24,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:40:24,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:24,717 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:24,717 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:40:24,717 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556926600] [2019-10-14 21:40:24,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:40:24,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:24,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:40:24,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:40:24,719 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-14 21:40:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:24,830 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-14 21:40:24,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:40:24,831 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-14 21:40:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:24,832 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:40:24,832 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:40:24,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:40:24,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:40:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-14 21:40:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:40:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-14 21:40:24,838 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-14 21:40:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:24,838 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-14 21:40:24,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:40:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-14 21:40:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 21:40:24,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:24,840 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:25,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:25,044 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:25,044 INFO L82 PathProgramCache]: Analyzing trace with hash 440415299, now seen corresponding path program 14 times [2019-10-14 21:40:25,044 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:25,044 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186957347] [2019-10-14 21:40:25,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:25,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:25,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:25,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186957347] [2019-10-14 21:40:25,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859813598] [2019-10-14 21:40:25,266 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:25,338 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:25,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:25,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:40:25,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:25,362 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:25,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:40:25,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488246963] [2019-10-14 21:40:25,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:40:25,363 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:25,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:40:25,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:40:25,364 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-14 21:40:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:25,505 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-14 21:40:25,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:40:25,505 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-14 21:40:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:25,506 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:40:25,506 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:40:25,507 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:40:25,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:40:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 21:40:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:40:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-14 21:40:25,519 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-14 21:40:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:25,519 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-14 21:40:25,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:40:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-14 21:40:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 21:40:25,520 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:25,520 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:25,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:25,721 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:25,721 INFO L82 PathProgramCache]: Analyzing trace with hash -600571739, now seen corresponding path program 15 times [2019-10-14 21:40:25,722 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:25,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294562150] [2019-10-14 21:40:25,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:25,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:25,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 21:40:25,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294562150] [2019-10-14 21:40:25,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006302130] [2019-10-14 21:40:25,939 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:26,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:40:26,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:26,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:40:26,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-14 21:40:26,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:26,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 21:40:26,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033363220] [2019-10-14 21:40:26,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:40:26,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:40:26,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:26,145 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-14 21:40:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:26,344 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-14 21:40:26,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:40:26,345 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-14 21:40:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:26,346 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:40:26,346 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:40:26,347 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:40:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-14 21:40:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:40:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-14 21:40:26,351 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-14 21:40:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:26,351 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-14 21:40:26,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:40:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-14 21:40:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:40:26,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:26,353 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:26,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:26,554 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:26,555 INFO L82 PathProgramCache]: Analyzing trace with hash 25314053, now seen corresponding path program 16 times [2019-10-14 21:40:26,555 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:26,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335105897] [2019-10-14 21:40:26,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:26,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:26,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:40:26,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335105897] [2019-10-14 21:40:26,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282264931] [2019-10-14 21:40:26,789 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:26,877 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:26,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:26,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:40:26,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:40:26,908 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:26,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:40:26,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218520894] [2019-10-14 21:40:26,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:40:26,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:26,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:40:26,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:40:26,910 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-14 21:40:27,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:27,105 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-14 21:40:27,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:40:27,106 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-14 21:40:27,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:27,107 INFO L225 Difference]: With dead ends: 118 [2019-10-14 21:40:27,107 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:40:27,108 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:40:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:40:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 21:40:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:40:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-14 21:40:27,116 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-14 21:40:27,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:27,116 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-14 21:40:27,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:40:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-14 21:40:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 21:40:27,118 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:27,118 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:27,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:27,319 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash -124797465, now seen corresponding path program 17 times [2019-10-14 21:40:27,320 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:27,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54091410] [2019-10-14 21:40:27,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:27,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:27,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 21:40:27,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54091410] [2019-10-14 21:40:27,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321161313] [2019-10-14 21:40:27,594 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:28,539 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 21:40:28,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:28,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:40:28,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-14 21:40:28,656 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:28,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-14 21:40:28,656 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477824774] [2019-10-14 21:40:28,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:40:28,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:40:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:40:28,658 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-14 21:40:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:29,003 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-14 21:40:29,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:40:29,004 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-14 21:40:29,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:29,005 INFO L225 Difference]: With dead ends: 123 [2019-10-14 21:40:29,005 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:40:29,006 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:40:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:40:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-14 21:40:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 21:40:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-14 21:40:29,010 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-14 21:40:29,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:29,010 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-14 21:40:29,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:40:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-14 21:40:29,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 21:40:29,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:29,011 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:29,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:29,213 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash 933335591, now seen corresponding path program 18 times [2019-10-14 21:40:29,214 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:29,214 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481353249] [2019-10-14 21:40:29,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:29,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:29,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-14 21:40:29,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481353249] [2019-10-14 21:40:29,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620439211] [2019-10-14 21:40:29,476 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:29,907 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:40:29,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:29,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:40:29,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-10-14 21:40:30,027 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:30,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-10-14 21:40:30,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738197113] [2019-10-14 21:40:30,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:40:30,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:40:30,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:40:30,028 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-10-14 21:40:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:30,301 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-10-14 21:40:30,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:40:30,302 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-10-14 21:40:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:30,303 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:40:30,303 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 21:40:30,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:40:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 21:40:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-10-14 21:40:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-14 21:40:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-14 21:40:30,315 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-10-14 21:40:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:30,315 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-14 21:40:30,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:40:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-14 21:40:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 21:40:30,316 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:30,316 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:30,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:30,517 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:30,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:30,518 INFO L82 PathProgramCache]: Analyzing trace with hash 34033799, now seen corresponding path program 19 times [2019-10-14 21:40:30,518 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:30,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505455354] [2019-10-14 21:40:30,519 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:30,519 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:30,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:30,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505455354] [2019-10-14 21:40:30,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969474562] [2019-10-14 21:40:30,816 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:30,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:40:30,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:30,945 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:30,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:40:30,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553549342] [2019-10-14 21:40:30,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:40:30,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:40:30,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:30,947 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-10-14 21:40:31,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:31,119 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-10-14 21:40:31,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:40:31,119 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-10-14 21:40:31,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:31,120 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:40:31,120 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:40:31,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:40:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:40:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-14 21:40:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 21:40:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-14 21:40:31,125 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-10-14 21:40:31,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:31,125 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-14 21:40:31,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:40:31,126 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-14 21:40:31,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:40:31,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:31,127 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:31,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:31,331 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:31,331 INFO L82 PathProgramCache]: Analyzing trace with hash 44767209, now seen corresponding path program 20 times [2019-10-14 21:40:31,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:31,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333942199] [2019-10-14 21:40:31,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:31,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:31,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:31,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333942199] [2019-10-14 21:40:31,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538876943] [2019-10-14 21:40:31,630 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:31,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:31,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:31,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:40:31,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:31,785 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:31,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:40:31,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893459217] [2019-10-14 21:40:31,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:40:31,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:31,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:40:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:40:31,787 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-10-14 21:40:31,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:31,992 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-14 21:40:31,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:40:31,992 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-14 21:40:31,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:31,993 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:40:31,993 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:40:31,994 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:40:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:40:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-14 21:40:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 21:40:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-14 21:40:32,000 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-14 21:40:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:32,000 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-14 21:40:32,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:40:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-14 21:40:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 21:40:32,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:32,001 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:32,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:32,202 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:32,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:32,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1769639627, now seen corresponding path program 21 times [2019-10-14 21:40:32,203 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:32,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148907358] [2019-10-14 21:40:32,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:32,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:32,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-14 21:40:32,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148907358] [2019-10-14 21:40:32,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670325917] [2019-10-14 21:40:32,647 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:32,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:40:32,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:32,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:40:32,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-10-14 21:40:32,969 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:32,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-10-14 21:40:32,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116682700] [2019-10-14 21:40:32,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:40:32,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:32,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:40:32,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:40:32,971 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-10-14 21:40:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:33,242 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-10-14 21:40:33,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:40:33,242 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-10-14 21:40:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:33,243 INFO L225 Difference]: With dead ends: 139 [2019-10-14 21:40:33,243 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 21:40:33,244 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:40:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 21:40:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 21:40:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:40:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-10-14 21:40:33,248 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-10-14 21:40:33,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:33,249 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-10-14 21:40:33,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:40:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-10-14 21:40:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 21:40:33,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:33,250 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:33,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:33,451 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:33,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1205252651, now seen corresponding path program 22 times [2019-10-14 21:40:33,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:33,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851114899] [2019-10-14 21:40:33,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:33,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:33,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:40:33,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851114899] [2019-10-14 21:40:33,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813659656] [2019-10-14 21:40:33,825 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:33,939 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:33,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:33,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:40:33,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:40:33,975 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:33,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:40:33,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950386704] [2019-10-14 21:40:33,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:40:33,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:40:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:40:33,976 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-10-14 21:40:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:34,177 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-10-14 21:40:34,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:40:34,177 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-10-14 21:40:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:34,178 INFO L225 Difference]: With dead ends: 142 [2019-10-14 21:40:34,179 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 21:40:34,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:40:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 21:40:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 21:40:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 21:40:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-14 21:40:34,185 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-10-14 21:40:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:34,185 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-14 21:40:34,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:40:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-14 21:40:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 21:40:34,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:34,187 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:34,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:34,391 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash -369756275, now seen corresponding path program 23 times [2019-10-14 21:40:34,392 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:34,392 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952622911] [2019-10-14 21:40:34,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:34,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:34,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-14 21:40:34,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952622911] [2019-10-14 21:40:34,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074159773] [2019-10-14 21:40:34,854 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:37,033 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-14 21:40:37,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:37,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:40:37,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-10-14 21:40:37,217 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:37,217 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-10-14 21:40:37,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752352968] [2019-10-14 21:40:37,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:40:37,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:37,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:40:37,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:40:37,219 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-10-14 21:40:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:37,645 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-10-14 21:40:37,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:40:37,645 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-10-14 21:40:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:37,646 INFO L225 Difference]: With dead ends: 147 [2019-10-14 21:40:37,647 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 21:40:37,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:40:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 21:40:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-10-14 21:40:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 21:40:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-10-14 21:40:37,652 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-10-14 21:40:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:37,653 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-10-14 21:40:37,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:40:37,653 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-10-14 21:40:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 21:40:37,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:37,654 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:37,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:37,861 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:37,861 INFO L82 PathProgramCache]: Analyzing trace with hash 585301965, now seen corresponding path program 24 times [2019-10-14 21:40:37,862 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:37,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591554107] [2019-10-14 21:40:37,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:37,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:37,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-10-14 21:40:38,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591554107] [2019-10-14 21:40:38,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024858988] [2019-10-14 21:40:38,381 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:39,322 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 21:40:39,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:39,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:40:39,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-10-14 21:40:39,484 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:39,484 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-10-14 21:40:39,485 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066663795] [2019-10-14 21:40:39,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:40:39,485 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:39,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:40:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:40:39,487 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-10-14 21:40:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:39,767 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-10-14 21:40:39,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:40:39,767 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-10-14 21:40:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:39,768 INFO L225 Difference]: With dead ends: 153 [2019-10-14 21:40:39,769 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:40:39,770 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:40:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:40:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-10-14 21:40:39,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 21:40:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-10-14 21:40:39,775 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-10-14 21:40:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:39,775 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-10-14 21:40:39,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:40:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-10-14 21:40:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 21:40:39,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:39,777 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:39,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:39,982 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:39,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1800822573, now seen corresponding path program 25 times [2019-10-14 21:40:39,983 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:39,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986628949] [2019-10-14 21:40:39,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:39,985 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:39,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:40,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986628949] [2019-10-14 21:40:40,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124209949] [2019-10-14 21:40:40,472 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:40,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:40:40,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:40,617 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:40,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:40:40,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373836087] [2019-10-14 21:40:40,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:40:40,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:40,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:40:40,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:40:40,619 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-10-14 21:40:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:40,851 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-10-14 21:40:40,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:40:40,851 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-10-14 21:40:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:40,853 INFO L225 Difference]: With dead ends: 156 [2019-10-14 21:40:40,853 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 21:40:40,854 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:40:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 21:40:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-14 21:40:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 21:40:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-14 21:40:40,859 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-10-14 21:40:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:40,859 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-14 21:40:40,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:40:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-14 21:40:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 21:40:40,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:40,860 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:41,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:41,065 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:41,065 INFO L82 PathProgramCache]: Analyzing trace with hash -187199217, now seen corresponding path program 26 times [2019-10-14 21:40:41,066 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:41,066 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960057617] [2019-10-14 21:40:41,066 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:41,066 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:41,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:41,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960057617] [2019-10-14 21:40:41,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241164467] [2019-10-14 21:40:41,565 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:41,679 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:40:41,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:41,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:40:41,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:41,712 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:41,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:40:41,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60841607] [2019-10-14 21:40:41,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:40:41,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:41,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:40:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:40:41,714 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-10-14 21:40:41,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:41,846 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-10-14 21:40:41,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:40:41,847 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-10-14 21:40:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:41,848 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:40:41,848 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 21:40:41,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:40:41,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 21:40:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-14 21:40:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 21:40:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-14 21:40:41,857 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-10-14 21:40:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:41,857 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-14 21:40:41,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:40:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-14 21:40:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-14 21:40:41,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:41,858 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:42,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:42,061 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:42,062 INFO L82 PathProgramCache]: Analyzing trace with hash 584307313, now seen corresponding path program 27 times [2019-10-14 21:40:42,062 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:42,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721629063] [2019-10-14 21:40:42,062 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:42,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:42,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-14 21:40:42,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721629063] [2019-10-14 21:40:42,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011622907] [2019-10-14 21:40:42,455 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:42,638 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:40:42,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:42,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:40:42,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-10-14 21:40:42,826 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:42,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-10-14 21:40:42,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177352739] [2019-10-14 21:40:42,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 21:40:42,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:42,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 21:40:42,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:40:42,828 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-10-14 21:40:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:43,344 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-10-14 21:40:43,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:40:43,345 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-10-14 21:40:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:43,346 INFO L225 Difference]: With dead ends: 163 [2019-10-14 21:40:43,346 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 21:40:43,348 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-10-14 21:40:43,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 21:40:43,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-10-14 21:40:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-14 21:40:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-10-14 21:40:43,352 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-10-14 21:40:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:43,352 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-10-14 21:40:43,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 21:40:43,353 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-10-14 21:40:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-14 21:40:43,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:43,354 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:43,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:43,558 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:43,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:43,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1229503153, now seen corresponding path program 28 times [2019-10-14 21:40:43,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:43,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927241416] [2019-10-14 21:40:43,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:43,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:43,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-10-14 21:40:44,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927241416] [2019-10-14 21:40:44,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640821254] [2019-10-14 21:40:44,012 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:44,140 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:40:44,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:40:44,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:40:44,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:40:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-10-14 21:40:44,342 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:40:44,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-10-14 21:40:44,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979868447] [2019-10-14 21:40:44,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 21:40:44,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:40:44,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 21:40:44,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:40:44,344 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-10-14 21:40:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:40:44,839 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-10-14 21:40:44,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 21:40:44,839 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-10-14 21:40:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:40:44,840 INFO L225 Difference]: With dead ends: 169 [2019-10-14 21:40:44,841 INFO L226 Difference]: Without dead ends: 119 [2019-10-14 21:40:44,842 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-10-14 21:40:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-14 21:40:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-10-14 21:40:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 21:40:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-10-14 21:40:44,847 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-10-14 21:40:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:40:44,848 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-10-14 21:40:44,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 21:40:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-10-14 21:40:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 21:40:44,849 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:40:44,849 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:40:45,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:40:45,053 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:40:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:40:45,053 INFO L82 PathProgramCache]: Analyzing trace with hash -46911247, now seen corresponding path program 29 times [2019-10-14 21:40:45,053 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:40:45,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848623586] [2019-10-14 21:40:45,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:45,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:40:45,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:40:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:40:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-14 21:40:45,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848623586] [2019-10-14 21:40:45,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906957986] [2019-10-14 21:40:45,501 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true