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/copy-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:47:55,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:47:55,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:47:55,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:47:55,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:47:55,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:47:55,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:47:55,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:47:55,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:47:55,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:47:55,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:47:55,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:47:55,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:47:55,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:47:55,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:47:55,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:47:55,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:47:55,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:47:55,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:47:55,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:47:55,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:47:55,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:47:55,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:47:55,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:47:55,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:47:55,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:47:55,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:47:55,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:47:55,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:47:55,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:47:55,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:47:55,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:47:55,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:47:55,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:47:55,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:47:55,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:47:55,727 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 21:47:55,748 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:47:55,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:47:55,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:47:55,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:47:55,754 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:47:55,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:47:55,754 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:47:55,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:47:55,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:47:55,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:47:55,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:47:55,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:47:55,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:47:55,755 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:47:55,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:47:55,756 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:47:55,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:47:55,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:47:55,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:47:55,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:47:55,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:47:55,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:55,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:47:55,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:47:55,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:47:55,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:47:55,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:47:55,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:47:55,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:47:56,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:47:56,043 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:47:56,049 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:47:56,050 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:47:56,051 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:47:56,051 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-3-n-u.c [2019-10-14 21:47:56,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91ab21c24/df5b2b82357340e3971ece9558ca2961/FLAG9676fed6c [2019-10-14 21:47:56,640 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:47:56,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-3-n-u.c [2019-10-14 21:47:56,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91ab21c24/df5b2b82357340e3971ece9558ca2961/FLAG9676fed6c [2019-10-14 21:47:56,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91ab21c24/df5b2b82357340e3971ece9558ca2961 [2019-10-14 21:47:57,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:47:57,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:47:57,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:57,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:47:57,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:47:57,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:56" (1/1) ... [2019-10-14 21:47:57,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb457ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57, skipping insertion in model container [2019-10-14 21:47:57,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:56" (1/1) ... [2019-10-14 21:47:57,025 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:47:57,044 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:47:57,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:57,251 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:47:57,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:57,378 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:47:57,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57 WrapperNode [2019-10-14 21:47:57,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:57,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:47:57,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:47:57,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:47:57,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57" (1/1) ... [2019-10-14 21:47:57,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57" (1/1) ... [2019-10-14 21:47:57,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57" (1/1) ... [2019-10-14 21:47:57,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57" (1/1) ... [2019-10-14 21:47:57,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57" (1/1) ... [2019-10-14 21:47:57,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57" (1/1) ... [2019-10-14 21:47:57,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57" (1/1) ... [2019-10-14 21:47:57,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:47:57,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:47:57,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:47:57,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:47:57,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57" (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 21:47:57,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:47:57,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:47:57,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:47:57,481 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:47:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:47:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:47:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:47:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:47:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:47:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:47:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:47:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:47:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:47:57,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:47:57,783 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:47:57,784 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-14 21:47:57,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:57 BoogieIcfgContainer [2019-10-14 21:47:57,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:47:57,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:47:57,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:47:57,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:47:57,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:47:56" (1/3) ... [2019-10-14 21:47:57,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f17a276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:57, skipping insertion in model container [2019-10-14 21:47:57,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:57" (2/3) ... [2019-10-14 21:47:57,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f17a276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:57, skipping insertion in model container [2019-10-14 21:47:57,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:57" (3/3) ... [2019-10-14 21:47:57,794 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-3-n-u.c [2019-10-14 21:47:57,806 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:47:57,815 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:47:57,827 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:47:57,857 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:47:57,857 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:47:57,857 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:47:57,857 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:47:57,857 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:47:57,857 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:47:57,857 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:47:57,858 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:47:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-10-14 21:47:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:47:57,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:57,880 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:57,883 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:57,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1773460249, now seen corresponding path program 1 times [2019-10-14 21:47:57,895 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:57,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589699310] [2019-10-14 21:47:57,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:57,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:57,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:57,988 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:57,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091350408] [2019-10-14 21:47:57,989 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 21:47:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-14 21:47:58,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:58,083 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 21:47:58,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589699310] [2019-10-14 21:47:58,084 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:58,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091350408] [2019-10-14 21:47:58,085 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:58,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 21:47:58,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214836574] [2019-10-14 21:47:58,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 21:47:58,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:58,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 21:47:58,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:47:58,110 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-10-14 21:47:58,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:58,139 INFO L93 Difference]: Finished difference Result 66 states and 103 transitions. [2019-10-14 21:47:58,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 21:47:58,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-14 21:47:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:58,150 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:47:58,151 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:47:58,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:47:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:47:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 21:47:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:47:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-10-14 21:47:58,196 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2019-10-14 21:47:58,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:58,197 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-10-14 21:47:58,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 21:47:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-10-14 21:47:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:47:58,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:58,199 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:58,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,401 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:58,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1763514787, now seen corresponding path program 1 times [2019-10-14 21:47:58,402 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:58,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069243622] [2019-10-14 21:47:58,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:58,415 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:58,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205573472] [2019-10-14 21:47:58,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:47:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:58,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:58,544 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 21:47:58,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069243622] [2019-10-14 21:47:58,545 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:58,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205573472] [2019-10-14 21:47:58,546 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:58,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:47:58,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579130650] [2019-10-14 21:47:58,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:47:58,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:58,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:47:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:58,550 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 3 states. [2019-10-14 21:47:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:58,597 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-10-14 21:47:58,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:47:58,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-14 21:47:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:58,600 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:47:58,600 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:47:58,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 21:47:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:47:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-10-14 21:47:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:47:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-10-14 21:47:58,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2019-10-14 21:47:58,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:58,609 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-10-14 21:47:58,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:47:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-10-14 21:47:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:47:58,610 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:58,611 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 21:47:58,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,815 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:58,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2133227694, now seen corresponding path program 1 times [2019-10-14 21:47:58,816 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:58,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135444497] [2019-10-14 21:47:58,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:58,827 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:58,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140294746] [2019-10-14 21:47:58,828 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 21:47:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:58,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:58,906 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 21:47:58,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135444497] [2019-10-14 21:47:58,907 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:58,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140294746] [2019-10-14 21:47:58,908 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:58,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:58,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652259367] [2019-10-14 21:47:58,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:58,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:58,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:58,910 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-10-14 21:47:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:59,045 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2019-10-14 21:47:59,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:59,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 21:47:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:59,053 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:47:59,054 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:47:59,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 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 21:47:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:47:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2019-10-14 21:47:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:47:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-10-14 21:47:59,081 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2019-10-14 21:47:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:59,085 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-10-14 21:47:59,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-10-14 21:47:59,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:47:59,087 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:59,087 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, 1, 1, 1] [2019-10-14 21:47:59,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:59,294 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1108398309, now seen corresponding path program 1 times [2019-10-14 21:47:59,296 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:59,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366748440] [2019-10-14 21:47:59,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:59,305 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:59,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443802705] [2019-10-14 21:47:59,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:59,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:59,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:59,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366748440] [2019-10-14 21:47:59,400 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:59,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443802705] [2019-10-14 21:47:59,401 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:59,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:59,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909203496] [2019-10-14 21:47:59,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:59,402 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:59,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:59,403 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 4 states. [2019-10-14 21:47:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:59,483 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2019-10-14 21:47:59,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:59,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 21:47:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:59,485 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:47:59,485 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:47:59,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 21:47:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:47:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2019-10-14 21:47:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:47:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-14 21:47:59,495 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 23 [2019-10-14 21:47:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:59,495 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-14 21:47:59,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-14 21:47:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:47:59,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:59,496 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, 1, 1, 1, 1] [2019-10-14 21:47:59,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:59,701 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:59,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1602833213, now seen corresponding path program 1 times [2019-10-14 21:47:59,702 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:59,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565969177] [2019-10-14 21:47:59,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:59,714 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:47:59,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268121813] [2019-10-14 21:47:59,718 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 21:47:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:59,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:47:59,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:59,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565969177] [2019-10-14 21:47:59,796 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:47:59,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268121813] [2019-10-14 21:47:59,797 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:47:59,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:47:59,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000331471] [2019-10-14 21:47:59,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:47:59,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:59,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:47:59,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:47:59,803 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2019-10-14 21:47:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:59,913 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-10-14 21:47:59,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:47:59,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-14 21:47:59,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:59,915 INFO L225 Difference]: With dead ends: 79 [2019-10-14 21:47:59,915 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:47:59,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 21:47:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:47:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2019-10-14 21:47:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:47:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-14 21:47:59,939 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2019-10-14 21:47:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:59,940 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-14 21:47:59,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:47:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-14 21:47:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:47:59,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:59,945 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, 1, 1, 1, 1] [2019-10-14 21:48:00,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:00,146 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:00,147 INFO L82 PathProgramCache]: Analyzing trace with hash 249553947, now seen corresponding path program 2 times [2019-10-14 21:48:00,147 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:00,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020111408] [2019-10-14 21:48:00,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:00,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:00,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:00,158 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:00,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979390771] [2019-10-14 21:48:00,158 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 21:48:00,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:48:00,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:00,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:00,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:48:00,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020111408] [2019-10-14 21:48:00,236 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:00,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979390771] [2019-10-14 21:48:00,236 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:00,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:00,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916634814] [2019-10-14 21:48:00,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:00,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:00,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:00,244 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2019-10-14 21:48:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:00,327 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2019-10-14 21:48:00,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:00,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-14 21:48:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:00,330 INFO L225 Difference]: With dead ends: 89 [2019-10-14 21:48:00,330 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 21:48:00,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 21:48:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 21:48:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2019-10-14 21:48:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:48:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-14 21:48:00,351 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2019-10-14 21:48:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:00,353 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-14 21:48:00,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:00,353 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-14 21:48:00,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:48:00,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:00,355 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:00,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:00,559 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:00,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1698801625, now seen corresponding path program 1 times [2019-10-14 21:48:00,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:00,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786172119] [2019-10-14 21:48:00,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:00,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:00,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:00,570 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:00,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499518776] [2019-10-14 21:48:00,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:00,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:48:00,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786172119] [2019-10-14 21:48:00,668 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:00,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499518776] [2019-10-14 21:48:00,669 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:00,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:48:00,669 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568270420] [2019-10-14 21:48:00,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:00,670 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:00,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:00,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:00,671 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2019-10-14 21:48:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:00,786 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2019-10-14 21:48:00,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:00,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-14 21:48:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:00,787 INFO L225 Difference]: With dead ends: 89 [2019-10-14 21:48:00,787 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:48:00,788 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 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 21:48:00,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:48:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-14 21:48:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:48:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2019-10-14 21:48:00,800 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2019-10-14 21:48:00,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:00,800 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2019-10-14 21:48:00,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:00,801 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2019-10-14 21:48:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:48:00,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:00,803 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:01,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,010 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:01,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:01,011 INFO L82 PathProgramCache]: Analyzing trace with hash -602786922, now seen corresponding path program 2 times [2019-10-14 21:48:01,011 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:01,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279355548] [2019-10-14 21:48:01,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:01,018 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:01,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178810181] [2019-10-14 21:48:01,019 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:01,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:01,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:48:01,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:48:01,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279355548] [2019-10-14 21:48:01,115 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:01,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178810181] [2019-10-14 21:48:01,115 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:01,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:48:01,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638207519] [2019-10-14 21:48:01,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:48:01,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:48:01,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:01,117 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2019-10-14 21:48:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:01,257 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2019-10-14 21:48:01,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:48:01,258 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-10-14 21:48:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:01,259 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:48:01,259 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:48:01,260 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:48:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-10-14 21:48:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:48:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-10-14 21:48:01,271 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 35 [2019-10-14 21:48:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:01,271 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-10-14 21:48:01,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:48:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-10-14 21:48:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:48:01,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:01,273 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:01,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,477 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:01,477 INFO L82 PathProgramCache]: Analyzing trace with hash -119527047, now seen corresponding path program 3 times [2019-10-14 21:48:01,478 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:01,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291758325] [2019-10-14 21:48:01,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:01,488 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:01,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683250585] [2019-10-14 21:48:01,488 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,555 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:01,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:01,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:01,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-14 21:48:01,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291758325] [2019-10-14 21:48:01,597 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:01,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683250585] [2019-10-14 21:48:01,598 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:01,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:01,598 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780487871] [2019-10-14 21:48:01,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:01,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:01,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:01,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:01,599 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 5 states. [2019-10-14 21:48:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:01,668 INFO L93 Difference]: Finished difference Result 165 states and 206 transitions. [2019-10-14 21:48:01,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:01,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-10-14 21:48:01,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:01,671 INFO L225 Difference]: With dead ends: 165 [2019-10-14 21:48:01,671 INFO L226 Difference]: Without dead ends: 128 [2019-10-14 21:48:01,672 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 21:48:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-14 21:48:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 74. [2019-10-14 21:48:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:48:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2019-10-14 21:48:01,705 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 37 [2019-10-14 21:48:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:01,706 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2019-10-14 21:48:01,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2019-10-14 21:48:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:48:01,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:01,708 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:01,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,909 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:01,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1459343723, now seen corresponding path program 4 times [2019-10-14 21:48:01,909 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:01,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019051411] [2019-10-14 21:48:01,910 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,910 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:01,917 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:01,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850502308] [2019-10-14 21:48:01,918 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:02,027 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:02,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:02,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:02,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 21:48:02,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019051411] [2019-10-14 21:48:02,063 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:02,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850502308] [2019-10-14 21:48:02,063 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:02,063 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:02,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668672019] [2019-10-14 21:48:02,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:02,065 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:02,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:02,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:02,066 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 5 states. [2019-10-14 21:48:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:02,162 INFO L93 Difference]: Finished difference Result 215 states and 266 transitions. [2019-10-14 21:48:02,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:02,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-10-14 21:48:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:02,165 INFO L225 Difference]: With dead ends: 215 [2019-10-14 21:48:02,165 INFO L226 Difference]: Without dead ends: 156 [2019-10-14 21:48:02,166 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 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 21:48:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-10-14 21:48:02,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2019-10-14 21:48:02,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 21:48:02,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2019-10-14 21:48:02,184 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 57 [2019-10-14 21:48:02,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:02,185 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2019-10-14 21:48:02,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:02,185 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2019-10-14 21:48:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-14 21:48:02,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:02,186 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:02,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:02,400 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:02,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:02,401 INFO L82 PathProgramCache]: Analyzing trace with hash -371257155, now seen corresponding path program 5 times [2019-10-14 21:48:02,401 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:02,402 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055036786] [2019-10-14 21:48:02,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:02,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:02,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:02,413 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:02,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49526295] [2019-10-14 21:48:02,414 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true