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-multidimensional/rev-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:48:53,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:48:53,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:48:53,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:48:53,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:48:53,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:48:53,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:48:53,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:48:53,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:48:53,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:48:53,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:48:53,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:48:53,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:48:53,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:48:53,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:48:53,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:48:53,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:48:53,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:48:53,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:48:53,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:48:53,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:48:53,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:48:53,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:48:53,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:48:53,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:48:53,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:48:53,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:48:53,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:48:53,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:48:53,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:48:53,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:48:53,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:48:53,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:48:53,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:48:53,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:48:53,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:48:53,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:48:53,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:48:53,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:48:53,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:48:53,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:48:53,227 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 21:48:53,248 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:48:53,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:48:53,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:48:53,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:48:53,250 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:48:53,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:48:53,251 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:48:53,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:48:53,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:48:53,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:48:53,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:48:53,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:48:53,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:48:53,253 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:48:53,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:48:53,254 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:48:53,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:48:53,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:48:53,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:48:53,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:48:53,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:48:53,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:53,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:48:53,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:48:53,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:48:53,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:48:53,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:48:53,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:48:53,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:48:53,519 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:48:53,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:48:53,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:48:53,539 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:48:53,539 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:48:53,540 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c [2019-10-14 21:48:53,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69130ddd3/02e46a2440cc4bcc808f84d82e7c2386/FLAGac724b2f9 [2019-10-14 21:48:54,054 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:48:54,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-2-n-u.c [2019-10-14 21:48:54,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69130ddd3/02e46a2440cc4bcc808f84d82e7c2386/FLAGac724b2f9 [2019-10-14 21:48:54,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69130ddd3/02e46a2440cc4bcc808f84d82e7c2386 [2019-10-14 21:48:54,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:48:54,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:48:54,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:54,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:48:54,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:48:54,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:54" (1/1) ... [2019-10-14 21:48:54,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e86e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54, skipping insertion in model container [2019-10-14 21:48:54,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:54" (1/1) ... [2019-10-14 21:48:54,449 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:48:54,464 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:48:54,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:54,665 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:48:54,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:54,704 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:48:54,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54 WrapperNode [2019-10-14 21:48:54,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:54,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:48:54,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:48:54,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:48:54,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54" (1/1) ... [2019-10-14 21:48:54,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54" (1/1) ... [2019-10-14 21:48:54,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54" (1/1) ... [2019-10-14 21:48:54,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54" (1/1) ... [2019-10-14 21:48:54,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54" (1/1) ... [2019-10-14 21:48:54,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54" (1/1) ... [2019-10-14 21:48:54,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54" (1/1) ... [2019-10-14 21:48:54,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:48:54,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:48:54,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:48:54,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:48:54,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54" (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 21:48:54,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:48:54,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:48:54,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:48:54,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:48:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:48:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:48:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:48:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:48:54,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:48:54,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:48:54,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:48:54,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:48:54,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:48:54,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:48:55,180 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:48:55,180 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:48:55,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:55 BoogieIcfgContainer [2019-10-14 21:48:55,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:48:55,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:48:55,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:48:55,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:48:55,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:48:54" (1/3) ... [2019-10-14 21:48:55,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11550c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:55, skipping insertion in model container [2019-10-14 21:48:55,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:54" (2/3) ... [2019-10-14 21:48:55,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11550c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:55, skipping insertion in model container [2019-10-14 21:48:55,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:55" (3/3) ... [2019-10-14 21:48:55,190 INFO L109 eAbstractionObserver]: Analyzing ICFG rev-2-n-u.c [2019-10-14 21:48:55,200 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:48:55,208 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:48:55,221 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:48:55,249 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:48:55,250 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:48:55,250 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:48:55,250 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:48:55,250 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:48:55,250 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:48:55,250 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:48:55,251 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:48:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-14 21:48:55,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:48:55,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:55,276 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:55,278 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1035913628, now seen corresponding path program 1 times [2019-10-14 21:48:55,289 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:55,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405359859] [2019-10-14 21:48:55,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:55,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:55,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:55,364 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:55,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137259022] [2019-10-14 21:48:55,364 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 21:48:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:55,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:55,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:55,505 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 21:48:55,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405359859] [2019-10-14 21:48:55,506 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:55,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137259022] [2019-10-14 21:48:55,507 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:55,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:48:55,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71933158] [2019-10-14 21:48:55,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:48:55,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:55,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:48:55,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:55,525 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-10-14 21:48:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:55,606 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2019-10-14 21:48:55,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:48:55,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:48:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:55,619 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:48:55,620 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:48:55,625 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 21:48:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:48:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-14 21:48:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:48:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-14 21:48:55,664 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-10-14 21:48:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:55,664 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-14 21:48:55,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:48:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-14 21:48:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:48:55,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:55,666 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:55,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:55,870 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:55,872 INFO L82 PathProgramCache]: Analyzing trace with hash 573516244, now seen corresponding path program 1 times [2019-10-14 21:48:55,872 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:55,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934953764] [2019-10-14 21:48:55,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:55,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:55,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:55,883 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:55,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207936714] [2019-10-14 21:48:55,884 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 21:48:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:55,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:55,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:55,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934953764] [2019-10-14 21:48:55,966 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:55,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207936714] [2019-10-14 21:48:55,968 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:55,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:55,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653149500] [2019-10-14 21:48:55,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:55,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:55,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:55,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:55,973 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-14 21:48:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:56,049 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2019-10-14 21:48:56,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:56,051 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:48:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:56,054 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:48:56,054 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:48:56,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:56,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:48:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-10-14 21:48:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:48:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 21:48:56,079 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 19 [2019-10-14 21:48:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:56,079 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 21:48:56,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 21:48:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:48:56,081 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:56,081 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:56,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:56,282 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:56,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1173975853, now seen corresponding path program 1 times [2019-10-14 21:48:56,283 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:56,283 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119065263] [2019-10-14 21:48:56,283 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:56,292 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:56,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102822119] [2019-10-14 21:48:56,293 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 21:48:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:56,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:56,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:56,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119065263] [2019-10-14 21:48:56,379 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:56,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102822119] [2019-10-14 21:48:56,380 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:56,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:56,380 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710196395] [2019-10-14 21:48:56,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:56,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:56,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:56,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:56,382 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2019-10-14 21:48:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:56,476 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2019-10-14 21:48:56,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:56,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 21:48:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:56,478 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:48:56,478 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:48:56,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:48:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2019-10-14 21:48:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:48:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 21:48:56,487 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2019-10-14 21:48:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:56,488 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 21:48:56,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 21:48:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:48:56,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:56,489 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:56,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:56,690 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:56,690 INFO L82 PathProgramCache]: Analyzing trace with hash 488343988, now seen corresponding path program 2 times [2019-10-14 21:48:56,691 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:56,691 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699686978] [2019-10-14 21:48:56,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:56,699 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:56,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546534739] [2019-10-14 21:48:56,699 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 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 21:48:56,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:48:56,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:56,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:56,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:48:56,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699686978] [2019-10-14 21:48:56,791 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:56,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546534739] [2019-10-14 21:48:56,791 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:56,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:56,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984571972] [2019-10-14 21:48:56,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:56,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:56,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:56,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:56,793 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 4 states. [2019-10-14 21:48:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:56,879 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-10-14 21:48:56,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:56,880 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:48:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:56,881 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:48:56,881 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:48:56,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:48:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2019-10-14 21:48:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:48:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-10-14 21:48:56,893 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 21 [2019-10-14 21:48:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:56,894 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-10-14 21:48:56,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-10-14 21:48:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:48:56,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:56,895 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] [2019-10-14 21:48:57,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:57,107 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:57,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1641208904, now seen corresponding path program 1 times [2019-10-14 21:48:57,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:57,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195310735] [2019-10-14 21:48:57,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:57,117 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:57,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399091825] [2019-10-14 21:48:57,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:48:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:57,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:57,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:48:57,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195310735] [2019-10-14 21:48:57,208 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:57,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399091825] [2019-10-14 21:48:57,208 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:57,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:48:57,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138127319] [2019-10-14 21:48:57,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:57,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:57,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:57,210 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 6 states. [2019-10-14 21:48:57,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:57,299 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2019-10-14 21:48:57,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:57,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-14 21:48:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:57,301 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:48:57,301 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:48:57,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:57,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:48:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-10-14 21:48:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:48:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-10-14 21:48:57,317 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2019-10-14 21:48:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:57,317 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-10-14 21:48:57,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-10-14 21:48:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:48:57,319 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:57,319 INFO L380 BasicCegarLoop]: trace histogram [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 21:48:57,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:57,523 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1483393922, now seen corresponding path program 2 times [2019-10-14 21:48:57,525 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:57,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308839348] [2019-10-14 21:48:57,525 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,525 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:57,532 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:57,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157174161] [2019-10-14 21:48:57,533 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 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 21:48:57,577 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:57,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:57,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:57,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:48:57,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308839348] [2019-10-14 21:48:57,620 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:57,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157174161] [2019-10-14 21:48:57,620 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:57,620 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:57,620 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137509971] [2019-10-14 21:48:57,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:57,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:57,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:57,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:57,622 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2019-10-14 21:48:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:57,704 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2019-10-14 21:48:57,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:57,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-14 21:48:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:57,706 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:48:57,706 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 21:48:57,707 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 21:48:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 52. [2019-10-14 21:48:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:48:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-14 21:48:57,720 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 28 [2019-10-14 21:48:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:57,720 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-14 21:48:57,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-14 21:48:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:48:57,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:57,722 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:57,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:57,926 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:57,926 INFO L82 PathProgramCache]: Analyzing trace with hash -347991136, now seen corresponding path program 3 times [2019-10-14 21:48:57,926 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:57,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123428880] [2019-10-14 21:48:57,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:57,937 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:57,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415070736] [2019-10-14 21:48:57,937 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 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 21:48:58,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 21:48:58,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:58,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-14 21:48:58,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:58,055 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2019-10-14 21:48:58,055 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:58,069 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:58,069 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:58,070 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-10-14 21:48:58,155 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 36 treesize of output 36 [2019-10-14 21:48:58,156 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:58,179 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:58,179 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:58,180 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:55 [2019-10-14 21:48:58,229 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,230 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,233 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 80 [2019-10-14 21:48:58,234 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:58,261 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:58,262 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:48:58,262 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:102, output treesize:98 [2019-10-14 21:48:58,330 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,331 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,332 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,333 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,334 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,335 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,338 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 99 [2019-10-14 21:48:58,339 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:58,367 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:58,368 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-14 21:48:58,369 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:108 [2019-10-14 21:48:58,440 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,441 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,442 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,443 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,444 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,448 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,519 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:58,520 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 389 [2019-10-14 21:48:58,523 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:58,649 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2019-10-14 21:48:58,650 INFO L567 ElimStorePlain]: treesize reduction 432, result has 25.9 percent of original size [2019-10-14 21:48:58,651 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-10-14 21:48:58,652 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:155, output treesize:151 [2019-10-14 21:48:58,720 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,721 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,722 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,723 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,724 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,726 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:58,906 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-10-14 21:48:58,906 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:58,907 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 164 treesize of output 717 [2019-10-14 21:48:58,913 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:59,088 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 75 [2019-10-14 21:48:59,089 INFO L567 ElimStorePlain]: treesize reduction 950, result has 17.0 percent of original size [2019-10-14 21:48:59,092 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-14 21:48:59,092 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:198, output treesize:194 [2019-10-14 21:48:59,158 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:59,159 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:59,160 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:59,162 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:59,163 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:59,164 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:59,328 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-10-14 21:48:59,329 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:59,330 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 164 treesize of output 717 [2019-10-14 21:48:59,335 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:59,556 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 75 [2019-10-14 21:48:59,557 INFO L567 ElimStorePlain]: treesize reduction 1022, result has 16.0 percent of original size [2019-10-14 21:48:59,559 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-14 21:48:59,560 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:198, output treesize:194 [2019-10-14 21:49:08,172 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:49:08,173 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:49:08,175 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:49:08,179 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:49:08,181 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:49:08,182 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:49:08,184 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:49:08,187 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:49:08,214 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:08,215 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 89 [2019-10-14 21:49:08,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:49:08,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:49:08,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:49:08,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:49:08,221 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:08,234 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:08,236 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:08,236 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:102, output treesize:3 [2019-10-14 21:49:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:49:08,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123428880] [2019-10-14 21:49:08,305 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:08,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415070736] [2019-10-14 21:49:08,305 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:08,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-14 21:49:08,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641560041] [2019-10-14 21:49:08,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:49:08,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:08,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:49:08,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=206, Unknown=4, NotChecked=0, Total=272 [2019-10-14 21:49:08,307 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 17 states. [2019-10-14 21:49:10,619 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2019-10-14 21:49:10,817 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-10-14 21:49:18,976 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 84 [2019-10-14 21:49:21,810 WARN L191 SmtUtils]: Spent 773.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2019-10-14 21:49:25,906 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 74