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/add-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:47:51,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:47:51,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:47:51,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:47:51,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:47:51,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:47:51,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:47:51,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:47:51,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:47:51,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:47:51,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:47:51,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:47:51,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:47:51,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:47:51,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:47:51,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:47:51,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:47:51,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:47:51,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:47:51,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:47:51,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:47:51,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:47:51,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:47:51,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:47:51,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:47:51,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:47:51,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:47:51,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:47:51,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:47:51,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:47:51,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:47:51,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:47:51,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:47:51,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:47:51,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:47:51,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:47:51,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:47:51,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:47:51,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:47:51,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:47:51,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:47:51,567 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 21:47:51,590 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:47:51,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:47:51,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:47:51,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:47:51,592 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:47:51,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:47:51,592 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:47:51,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:47:51,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:47:51,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:47:51,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:47:51,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:47:51,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:47:51,598 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:47:51,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:47:51,598 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:47:51,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:47:51,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:47:51,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:47:51,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:47:51,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:47:51,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:51,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:47:51,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:47:51,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:47:51,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:47:51,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:47:51,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:47:51,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:47:51,849 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:47:51,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:47:51,875 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:47:51,876 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:47:51,876 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:47:51,877 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/add-2-n-u.c [2019-10-14 21:47:51,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb0dc0ccc/4b7e90a237f740b497e576eb14560b31/FLAG5827fe658 [2019-10-14 21:47:52,366 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:47:52,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/add-2-n-u.c [2019-10-14 21:47:52,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb0dc0ccc/4b7e90a237f740b497e576eb14560b31/FLAG5827fe658 [2019-10-14 21:47:52,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb0dc0ccc/4b7e90a237f740b497e576eb14560b31 [2019-10-14 21:47:52,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:47:52,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:47:52,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:52,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:47:52,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:47:52,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:52" (1/1) ... [2019-10-14 21:47:52,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:52, skipping insertion in model container [2019-10-14 21:47:52,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:52" (1/1) ... [2019-10-14 21:47:52,791 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:47:52,809 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:47:52,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:52,983 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:47:53,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:53,029 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:47:53,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53 WrapperNode [2019-10-14 21:47:53,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:53,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:47:53,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:47:53,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:47:53,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (1/1) ... [2019-10-14 21:47:53,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:47:53,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:47:53,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:47:53,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:47:53,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (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 21:47:53,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:47:53,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:47:53,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:47:53,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:47:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:47:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:47:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-14 21:47:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:47:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:47:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:47:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:47:53,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:47:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:47:53,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:47:53,698 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:47:53,698 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:47:53,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:53 BoogieIcfgContainer [2019-10-14 21:47:53,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:47:53,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:47:53,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:47:53,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:47:53,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:47:52" (1/3) ... [2019-10-14 21:47:53,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3436e5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:53, skipping insertion in model container [2019-10-14 21:47:53,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:53" (2/3) ... [2019-10-14 21:47:53,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3436e5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:53, skipping insertion in model container [2019-10-14 21:47:53,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:53" (3/3) ... [2019-10-14 21:47:53,707 INFO L109 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2019-10-14 21:47:53,716 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:47:53,721 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:47:53,731 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:47:53,753 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:47:53,753 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:47:53,753 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:47:53,754 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:47:53,754 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:47:53,754 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:47:53,754 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:47:53,754 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:47:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-14 21:47:53,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:47:53,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:53,777 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:53,779 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:53,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1035913628, now seen corresponding path program 1 times [2019-10-14 21:47:53,792 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:53,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490622364] [2019-10-14 21:47:53,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:53,881 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:53,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647877138] [2019-10-14 21:47:53,882 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 21:47:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:53,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:54,001 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 21:47:54,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490622364] [2019-10-14 21:47:54,002 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:54,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647877138] [2019-10-14 21:47:54,003 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:54,003 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:47:54,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066242571] [2019-10-14 21:47:54,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:47:54,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:54,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:47:54,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:54,023 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-10-14 21:47:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:54,090 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2019-10-14 21:47:54,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:47:54,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:47:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:54,101 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:47:54,101 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:47:54,105 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 21:47:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:47:54,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-14 21:47:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:47:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-14 21:47:54,146 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-10-14 21:47:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:54,146 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-14 21:47:54,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:47:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-14 21:47:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:47:54,148 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:54,148 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 21:47:54,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:54,353 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:54,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:54,353 INFO L82 PathProgramCache]: Analyzing trace with hash 573516244, now seen corresponding path program 1 times [2019-10-14 21:47:54,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:54,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866337844] [2019-10-14 21:47:54,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:54,369 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:54,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967722653] [2019-10-14 21:47:54,369 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 21:47:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:54,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:54,469 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 21:47:54,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866337844] [2019-10-14 21:47:54,470 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:54,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967722653] [2019-10-14 21:47:54,471 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:54,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:54,471 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790762443] [2019-10-14 21:47:54,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:54,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:54,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:54,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:54,474 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-14 21:47:54,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:54,537 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2019-10-14 21:47:54,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:54,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:47:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:54,540 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:47:54,541 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:47:54,542 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 21:47:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:47:54,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-10-14 21:47:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:47:54,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 21:47:54,553 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 19 [2019-10-14 21:47:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:54,553 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 21:47:54,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:54,554 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 21:47:54,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:47:54,555 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:54,555 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 21:47:54,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:54,759 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1173975853, now seen corresponding path program 1 times [2019-10-14 21:47:54,760 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:54,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482108010] [2019-10-14 21:47:54,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:54,776 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:54,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348256454] [2019-10-14 21:47:54,777 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 21:47:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:54,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:47:54,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:54,869 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 21:47:54,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482108010] [2019-10-14 21:47:54,870 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:54,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348256454] [2019-10-14 21:47:54,871 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:54,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:47:54,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604659397] [2019-10-14 21:47:54,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:47:54,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:54,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:47:54,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:47:54,873 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2019-10-14 21:47:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:54,994 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2019-10-14 21:47:54,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:47:54,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 21:47:54,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:54,998 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:47:54,998 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:47:54,998 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 21:47:54,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:47:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2019-10-14 21:47:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:47:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 21:47:55,007 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2019-10-14 21:47:55,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:55,007 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 21:47:55,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:47:55,007 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 21:47:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:47:55,008 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:55,008 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 21:47:55,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:55,219 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:55,219 INFO L82 PathProgramCache]: Analyzing trace with hash 488343988, now seen corresponding path program 2 times [2019-10-14 21:47:55,219 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:55,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836263550] [2019-10-14 21:47:55,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:55,227 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:55,228 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978693518] [2019-10-14 21:47:55,228 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 21:47:55,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:47:55,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:55,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:55,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:55,290 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 21:47:55,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836263550] [2019-10-14 21:47:55,290 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:55,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978693518] [2019-10-14 21:47:55,291 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:55,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:55,291 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185945827] [2019-10-14 21:47:55,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:55,292 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:55,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:55,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:55,293 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 4 states. [2019-10-14 21:47:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:55,376 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-10-14 21:47:55,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:55,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:47:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:55,378 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:47:55,378 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:47:55,379 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 21:47:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:47:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2019-10-14 21:47:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:47:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-10-14 21:47:55,396 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 21 [2019-10-14 21:47:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:55,396 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-10-14 21:47:55,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-10-14 21:47:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:47:55,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:55,400 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 21:47:55,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:55,605 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:55,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:55,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1641208904, now seen corresponding path program 1 times [2019-10-14 21:47:55,607 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:55,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367721430] [2019-10-14 21:47:55,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:55,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:55,615 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:55,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138603810] [2019-10-14 21:47:55,615 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 21:47:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:47:55,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:55,712 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 21:47:55,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367721430] [2019-10-14 21:47:55,713 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:55,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138603810] [2019-10-14 21:47:55,713 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:55,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:47:55,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455856073] [2019-10-14 21:47:55,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:47:55,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:47:55,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:55,715 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 6 states. [2019-10-14 21:47:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:55,788 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2019-10-14 21:47:55,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:47:55,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-14 21:47:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:55,790 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:47:55,790 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:47:55,791 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 21:47:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:47:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-10-14 21:47:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:47:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-10-14 21:47:55,800 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2019-10-14 21:47:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:55,800 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-10-14 21:47:55,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:47:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-10-14 21:47:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:47:55,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:55,801 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 21:47:56,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:56,005 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1483393922, now seen corresponding path program 2 times [2019-10-14 21:47:56,006 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:56,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952749892] [2019-10-14 21:47:56,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:56,013 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:56,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963758118] [2019-10-14 21:47:56,013 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 21:47:56,081 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:56,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:56,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:47:56,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:56,106 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 21:47:56,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952749892] [2019-10-14 21:47:56,107 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:56,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963758118] [2019-10-14 21:47:56,108 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:56,108 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:47:56,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561754544] [2019-10-14 21:47:56,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:47:56,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:56,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:47:56,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:47:56,109 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2019-10-14 21:47:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:56,241 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2019-10-14 21:47:56,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:47:56,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-14 21:47:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:56,243 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:47:56,244 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 21:47:56,246 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 21:47:56,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 21:47:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 52. [2019-10-14 21:47:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:47:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-14 21:47:56,270 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 28 [2019-10-14 21:47:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:56,270 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-14 21:47:56,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:47:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-14 21:47:56,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:47:56,273 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:56,273 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 21:47:56,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:56,478 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash -347991136, now seen corresponding path program 3 times [2019-10-14 21:47:56,479 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:56,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911220328] [2019-10-14 21:47:56,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:56,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:56,486 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:56,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307540229] [2019-10-14 21:47:56,489 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 21:47:56,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 21:47:56,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:56,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-14 21:47:56,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:56,957 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:56,958 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2019-10-14 21:47:56,959 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:56,981 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:56,981 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:56,982 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:28 [2019-10-14 21:47:57,132 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 42 [2019-10-14 21:47:57,134 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:57,181 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:57,182 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:57,182 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:69 [2019-10-14 21:47:57,247 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,250 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,252 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,254 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 95 [2019-10-14 21:47:57,256 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:57,293 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:57,294 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 21:47:57,295 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:122, output treesize:118 [2019-10-14 21:47:57,381 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,382 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,384 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,385 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,387 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,388 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,389 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,390 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,392 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,397 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 100 [2019-10-14 21:47:57,399 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:57,434 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:57,436 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 21:47:57,436 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:111 [2019-10-14 21:47:57,516 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,518 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,519 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,520 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,521 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,523 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,524 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,525 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,526 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:57,640 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-14 21:47:57,641 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:57,642 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 12 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 9 case distinctions, treesize of input 124 treesize of output 403 [2019-10-14 21:47:57,647 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:57,793 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 73 [2019-10-14 21:47:57,793 INFO L567 ElimStorePlain]: treesize reduction 449, result has 26.3 percent of original size [2019-10-14 21:47:57,796 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 21:47:57,796 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:164, output treesize:160 [2019-10-14 21:47:57,993 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2019-10-14 21:47:58,043 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,044 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,047 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,049 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,050 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,052 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,053 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,054 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,058 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,303 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-14 21:47:58,303 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:58,304 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 12 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 168 treesize of output 748 [2019-10-14 21:47:58,319 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:58,574 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 85 [2019-10-14 21:47:58,574 INFO L567 ElimStorePlain]: treesize reduction 1064, result has 16.4 percent of original size [2019-10-14 21:47:58,577 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 21:47:58,577 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:213, output treesize:209 [2019-10-14 21:47:58,661 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,662 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,664 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,665 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,666 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,667 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,668 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,669 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,670 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:47:58,897 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-14 21:47:58,898 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:58,899 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 12 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 168 treesize of output 748 [2019-10-14 21:47:58,910 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:59,148 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 85 [2019-10-14 21:47:59,149 INFO L567 ElimStorePlain]: treesize reduction 1068, result has 16.4 percent of original size [2019-10-14 21:47:59,151 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 21:47:59,152 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:213, output treesize:209 [2019-10-14 21:48:04,345 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:04,347 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:04,348 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:04,349 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:48:04,387 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:04,388 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 126 [2019-10-14 21:48:04,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:48:04,415 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:48:04,431 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:48:04,432 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:48:04,432 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:146, output treesize:5 [2019-10-14 21:48:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-14 21:48:04,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911220328] [2019-10-14 21:48:04,532 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:04,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307540229] [2019-10-14 21:48:04,532 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:04,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-14 21:48:04,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241510116] [2019-10-14 21:48:04,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:48:04,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:04,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:48:04,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=283, Unknown=2, NotChecked=0, Total=342 [2019-10-14 21:48:04,534 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 19 states. [2019-10-14 21:48:07,163 WARN L191 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 112 DAG size of output: 89 [2019-10-14 21:48:07,477 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2019-10-14 21:48:20,401 WARN L191 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 93 [2019-10-14 21:48:30,962 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 83