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-tiling/pnr2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:49:47,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:49:47,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:49:47,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:49:47,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:49:47,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:49:47,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:49:47,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:49:47,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:49:47,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:49:47,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:49:47,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:49:47,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:49:47,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:49:47,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:49:47,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:49:47,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:49:47,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:49:47,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:49:47,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:49:47,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:49:47,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:49:47,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:49:47,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:49:47,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:49:47,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:49:47,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:49:47,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:49:47,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:49:47,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:49:47,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:49:47,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:49:47,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:49:47,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:49:47,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:49:47,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:49:47,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:49:47,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:49:47,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:49:47,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:49:47,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:49:47,373 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 21:49:47,406 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:49:47,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:49:47,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:49:47,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:49:47,410 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:49:47,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:49:47,411 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:49:47,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:49:47,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:49:47,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:49:47,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:49:47,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:49:47,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:49:47,412 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:49:47,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:49:47,413 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:49:47,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:49:47,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:49:47,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:49:47,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:49:47,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:49:47,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:49:47,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:49:47,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:49:47,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:49:47,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:49:47,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:49:47,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:49:47,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:49:47,688 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:49:47,709 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:49:47,712 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:49:47,714 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:49:47,714 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:49:47,715 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pnr2.c [2019-10-14 21:49:47,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/231152019/f2ec50a68db842338cd3db0bce95f40f/FLAG02b876e66 [2019-10-14 21:49:48,289 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:49:48,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pnr2.c [2019-10-14 21:49:48,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/231152019/f2ec50a68db842338cd3db0bce95f40f/FLAG02b876e66 [2019-10-14 21:49:48,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/231152019/f2ec50a68db842338cd3db0bce95f40f [2019-10-14 21:49:48,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:49:48,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:49:48,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:48,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:49:48,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:49:48,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:48" (1/1) ... [2019-10-14 21:49:48,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709a02ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:48, skipping insertion in model container [2019-10-14 21:49:48,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:48" (1/1) ... [2019-10-14 21:49:48,730 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:49:48,751 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:49:48,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:48,933 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:49:48,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:49,059 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:49:49,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:49 WrapperNode [2019-10-14 21:49:49,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:49,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:49:49,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:49:49,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:49:49,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:49" (1/1) ... [2019-10-14 21:49:49,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:49" (1/1) ... [2019-10-14 21:49:49,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:49" (1/1) ... [2019-10-14 21:49:49,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:49" (1/1) ... [2019-10-14 21:49:49,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:49" (1/1) ... [2019-10-14 21:49:49,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:49" (1/1) ... [2019-10-14 21:49:49,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:49" (1/1) ... [2019-10-14 21:49:49,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:49:49,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:49:49,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:49:49,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:49:49,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:49" (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 21:49:49,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:49:49,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:49:49,167 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:49:49,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2019-10-14 21:49:49,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:49:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:49:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:49:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:49:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:49:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:49:49,169 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2019-10-14 21:49:49,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:49:49,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:49:49,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:49:49,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:49:49,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:49:49,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:49:49,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:49:49,441 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:49:49,442 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 21:49:49,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:49 BoogieIcfgContainer [2019-10-14 21:49:49,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:49:49,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:49:49,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:49:49,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:49:49,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:49:48" (1/3) ... [2019-10-14 21:49:49,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248a6257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:49, skipping insertion in model container [2019-10-14 21:49:49,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:49" (2/3) ... [2019-10-14 21:49:49,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248a6257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:49, skipping insertion in model container [2019-10-14 21:49:49,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:49" (3/3) ... [2019-10-14 21:49:49,457 INFO L109 eAbstractionObserver]: Analyzing ICFG pnr2.c [2019-10-14 21:49:49,471 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:49:49,480 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:49:49,494 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:49:49,529 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:49:49,529 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:49:49,529 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:49:49,529 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:49:49,530 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:49:49,530 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:49:49,530 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:49:49,530 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:49:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-10-14 21:49:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:49:49,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:49,567 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:49,574 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1000705867, now seen corresponding path program 1 times [2019-10-14 21:49:49,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:49,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840993773] [2019-10-14 21:49:49,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:49,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:49,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:49,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840993773] [2019-10-14 21:49:49,782 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:49,782 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:49:49,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532943485] [2019-10-14 21:49:49,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:49:49,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:49,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:49:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:49,801 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-10-14 21:49:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:49,954 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2019-10-14 21:49:49,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:49:49,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:49:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:49,967 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:49:49,967 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:49:49,971 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:49:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 21:49:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:49:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-10-14 21:49:50,024 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2019-10-14 21:49:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:50,025 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-14 21:49:50,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:49:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-10-14 21:49:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:49:50,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:50,028 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:50,028 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:50,029 INFO L82 PathProgramCache]: Analyzing trace with hash -457002250, now seen corresponding path program 1 times [2019-10-14 21:49:50,029 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:50,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933656839] [2019-10-14 21:49:50,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:50,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:50,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:50,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933656839] [2019-10-14 21:49:50,196 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:50,196 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:49:50,196 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631397109] [2019-10-14 21:49:50,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:49:50,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:50,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:49:50,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:49:50,199 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2019-10-14 21:49:50,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:50,379 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2019-10-14 21:49:50,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:49:50,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-10-14 21:49:50,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:50,382 INFO L225 Difference]: With dead ends: 49 [2019-10-14 21:49:50,382 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:49:50,383 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:49:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:49:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-10-14 21:49:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:49:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-14 21:49:50,395 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 15 [2019-10-14 21:49:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:50,396 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-14 21:49:50,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:49:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-14 21:49:50,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:49:50,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:50,398 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:50,398 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:50,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1020388245, now seen corresponding path program 1 times [2019-10-14 21:49:50,399 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:50,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129380745] [2019-10-14 21:49:50,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:50,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:50,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:49:51,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129380745] [2019-10-14 21:49:51,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989296078] [2019-10-14 21:49:51,122 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 21:49:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:51,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:49:51,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:51,303 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-10-14 21:49:51,303 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:51,314 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:51,315 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:51,315 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2019-10-14 21:49:51,362 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-10-14 21:49:51,363 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2019-10-14 21:49:51,363 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:51,371 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:51,372 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:51,372 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:8 [2019-10-14 21:49:51,419 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-10-14 21:49:51,420 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:51,422 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:51,422 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:51,423 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:4 [2019-10-14 21:49:51,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:49:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:49:51,454 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:51,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2019-10-14 21:49:51,455 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149459314] [2019-10-14 21:49:51,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:49:51,456 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:51,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:49:51,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:49:51,457 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 18 states. [2019-10-14 21:49:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:52,148 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2019-10-14 21:49:52,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:49:52,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-14 21:49:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:52,150 INFO L225 Difference]: With dead ends: 69 [2019-10-14 21:49:52,150 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:49:52,151 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:49:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:49:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2019-10-14 21:49:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:49:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2019-10-14 21:49:52,164 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 29 [2019-10-14 21:49:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:52,164 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2019-10-14 21:49:52,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:49:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2019-10-14 21:49:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:49:52,166 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:52,166 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:52,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:52,371 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:52,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1994715373, now seen corresponding path program 1 times [2019-10-14 21:49:52,372 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:52,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121048271] [2019-10-14 21:49:52,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:52,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:52,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:49:52,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121048271] [2019-10-14 21:49:52,883 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423869046] [2019-10-14 21:49:52,883 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 21:49:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:52,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:49:52,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:52,993 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-10-14 21:49:52,994 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:53,003 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:53,004 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:53,004 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2019-10-14 21:49:53,096 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-10-14 21:49:53,097 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-10-14 21:49:53,097 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:53,104 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:53,104 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:53,105 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2019-10-14 21:49:53,207 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 21:49:53,209 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:53,220 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:53,220 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:53,221 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2019-10-14 21:49:53,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:49:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:53,281 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:53,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-10-14 21:49:53,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722788493] [2019-10-14 21:49:53,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:49:53,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:53,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:49:53,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:49:53,283 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 21 states. [2019-10-14 21:49:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:54,834 INFO L93 Difference]: Finished difference Result 139 states and 172 transitions. [2019-10-14 21:49:54,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:49:54,835 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-10-14 21:49:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:54,840 INFO L225 Difference]: With dead ends: 139 [2019-10-14 21:49:54,841 INFO L226 Difference]: Without dead ends: 137 [2019-10-14 21:49:54,842 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:49:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-10-14 21:49:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 37. [2019-10-14 21:49:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:49:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-10-14 21:49:54,856 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 29 [2019-10-14 21:49:54,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:54,857 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-10-14 21:49:54,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:49:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-10-14 21:49:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:49:54,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:54,859 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 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 21:49:55,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:55,071 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:55,072 INFO L82 PathProgramCache]: Analyzing trace with hash 552081240, now seen corresponding path program 1 times [2019-10-14 21:49:55,073 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:55,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551719802] [2019-10-14 21:49:55,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:55,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:55,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:49:55,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551719802] [2019-10-14 21:49:55,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295199851] [2019-10-14 21:49:55,201 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 21:49:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:55,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:49:55,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:55,272 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:49:55,273 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:55,282 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:55,283 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:55,283 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:10 [2019-10-14 21:49:55,294 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2019-10-14 21:49:55,295 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:55,296 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:55,297 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:55,297 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:4 [2019-10-14 21:49:55,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:49:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:49:55,324 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:55,324 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-10-14 21:49:55,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874146834] [2019-10-14 21:49:55,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:49:55,325 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:55,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:49:55,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:49:55,327 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 13 states. [2019-10-14 21:49:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:55,644 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2019-10-14 21:49:55,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:49:55,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2019-10-14 21:49:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:55,646 INFO L225 Difference]: With dead ends: 72 [2019-10-14 21:49:55,647 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 21:49:55,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:49:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 21:49:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2019-10-14 21:49:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:49:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2019-10-14 21:49:55,662 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 37 [2019-10-14 21:49:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:55,662 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2019-10-14 21:49:55,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:49:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2019-10-14 21:49:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:49:55,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:55,664 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 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 21:49:55,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:55,868 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:55,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:55,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1036266662, now seen corresponding path program 1 times [2019-10-14 21:49:55,869 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:55,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117604925] [2019-10-14 21:49:55,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:55,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:55,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:49:56,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117604925] [2019-10-14 21:49:56,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665605823] [2019-10-14 21:49:56,049 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 21:49:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:56,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:49:56,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:56,170 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:49:56,170 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:56,175 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:56,176 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:56,176 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2019-10-14 21:49:56,280 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-10-14 21:49:56,281 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:56,286 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:56,287 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:56,287 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-10-14 21:49:56,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:49:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:49:56,332 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:56,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-10-14 21:49:56,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292887866] [2019-10-14 21:49:56,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:49:56,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:56,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:49:56,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:49:56,334 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 21 states. [2019-10-14 21:50:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:03,551 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2019-10-14 21:50:03,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:50:03,552 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2019-10-14 21:50:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:03,553 INFO L225 Difference]: With dead ends: 114 [2019-10-14 21:50:03,554 INFO L226 Difference]: Without dead ends: 112 [2019-10-14 21:50:03,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:50:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-14 21:50:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 45. [2019-10-14 21:50:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:50:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-14 21:50:03,566 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 37 [2019-10-14 21:50:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:03,566 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-14 21:50:03,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:50:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-14 21:50:03,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:50:03,568 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:03,568 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 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 21:50:03,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:03,772 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash -849160891, now seen corresponding path program 2 times [2019-10-14 21:50:03,773 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:03,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992523860] [2019-10-14 21:50:03,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:03,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:03,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:50:04,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992523860] [2019-10-14 21:50:04,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698192710] [2019-10-14 21:50:04,124 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 21:50:04,193 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:50:04,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:04,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:50:04,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:04,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:50:04,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:04,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:50:04,415 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:04,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2019-10-14 21:50:04,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301253269] [2019-10-14 21:50:04,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:50:04,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:50:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:50:04,418 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 17 states. [2019-10-14 21:50:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:04,954 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2019-10-14 21:50:04,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:50:04,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2019-10-14 21:50:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:04,956 INFO L225 Difference]: With dead ends: 90 [2019-10-14 21:50:04,956 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:50:04,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:50:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:50:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2019-10-14 21:50:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:50:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-10-14 21:50:04,969 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 45 [2019-10-14 21:50:04,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:04,969 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-10-14 21:50:04,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:50:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-10-14 21:50:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:50:04,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:04,972 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:05,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:05,188 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash -418118662, now seen corresponding path program 3 times [2019-10-14 21:50:05,189 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:05,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880800146] [2019-10-14 21:50:05,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:05,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:05,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:50:05,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880800146] [2019-10-14 21:50:05,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619380381] [2019-10-14 21:50:05,417 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 21:50:05,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:50:05,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:05,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:50:05,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:05,645 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-10-14 21:50:05,646 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:05,655 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:05,656 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:05,656 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2019-10-14 21:50:05,743 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:05,744 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2019-10-14 21:50:05,745 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:05,755 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:05,756 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:05,756 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:17 [2019-10-14 21:50:05,976 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-10-14 21:50:05,977 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:05,989 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:05,989 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:05,990 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:8 [2019-10-14 21:50:06,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:50:06,048 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:06,048 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2019-10-14 21:50:06,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688099492] [2019-10-14 21:50:06,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:50:06,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:06,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:50:06,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:50:06,050 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 24 states. [2019-10-14 21:50:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:36,314 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2019-10-14 21:50:36,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:50:36,314 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2019-10-14 21:50:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:36,316 INFO L225 Difference]: With dead ends: 133 [2019-10-14 21:50:36,316 INFO L226 Difference]: Without dead ends: 131 [2019-10-14 21:50:36,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:50:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-10-14 21:50:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 74. [2019-10-14 21:50:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:50:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2019-10-14 21:50:36,331 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 59 [2019-10-14 21:50:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:36,332 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2019-10-14 21:50:36,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:50:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2019-10-14 21:50:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:50:36,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:36,333 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:36,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:36,534 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:36,535 INFO L82 PathProgramCache]: Analyzing trace with hash 283481212, now seen corresponding path program 1 times [2019-10-14 21:50:36,535 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:36,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710096513] [2019-10-14 21:50:36,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:36,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:36,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:50:36,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710096513] [2019-10-14 21:50:36,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103860572] [2019-10-14 21:50:36,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:36,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:50:36,852 INFO L279 TraceCheckSpWp]: Computing forward predicates...