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-partial-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:49:03,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:49:03,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:49:03,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:49:03,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:49:03,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:49:03,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:49:03,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:49:03,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:49:03,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:49:03,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:49:03,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:49:03,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:49:03,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:49:03,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:49:03,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:49:03,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:49:03,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:49:03,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:49:03,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:49:03,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:49:03,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:49:03,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:49:03,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:49:03,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:49:03,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:49:03,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:49:03,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:49:03,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:49:03,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:49:03,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:49:03,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:49:03,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:49:03,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:49:03,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:49:03,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:49:03,764 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 [2019-10-13 17:49:03,783 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:49:03,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:49:03,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:49:03,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:49:03,788 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:49:03,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:49:03,789 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:49:03,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:49:03,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:49:03,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:49:03,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:49:03,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:49:03,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:49:03,792 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:49:03,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:49:03,792 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:49:03,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:49:03,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:49:03,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:49:03,793 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:49:03,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:49:03,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:49:03,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:49:03,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:49:03,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:49:03,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:49:03,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:49:03,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:49:03,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:49:04,067 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:49:04,085 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:49:04,089 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:49:04,090 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:49:04,091 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:49:04,091 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c [2019-10-13 17:49:04,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d39b0a45/c433eca5ebff402a871558a44c48d684/FLAGf95413d13 [2019-10-13 17:49:04,601 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:49:04,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c [2019-10-13 17:49:04,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d39b0a45/c433eca5ebff402a871558a44c48d684/FLAGf95413d13 [2019-10-13 17:49:04,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d39b0a45/c433eca5ebff402a871558a44c48d684 [2019-10-13 17:49:04,978 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:49:04,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:49:04,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:49:04,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:49:04,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:49:04,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:49:04" (1/1) ... [2019-10-13 17:49:04,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46892c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:04, skipping insertion in model container [2019-10-13 17:49:04,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:49:04" (1/1) ... [2019-10-13 17:49:04,997 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:49:05,018 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:49:05,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:49:05,272 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:49:05,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:49:05,317 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:49:05,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:05 WrapperNode [2019-10-13 17:49:05,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:49:05,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:49:05,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:49:05,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:49:05,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:05" (1/1) ... [2019-10-13 17:49:05,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:05" (1/1) ... [2019-10-13 17:49:05,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:05" (1/1) ... [2019-10-13 17:49:05,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:05" (1/1) ... [2019-10-13 17:49:05,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:05" (1/1) ... [2019-10-13 17:49:05,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:05" (1/1) ... [2019-10-13 17:49:05,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:05" (1/1) ... [2019-10-13 17:49:05,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:49:05,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:49:05,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:49:05,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:49:05,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:05" (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 [2019-10-13 17:49:05,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:49:05,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:49:05,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:49:05,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:49:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:49:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:49:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:49:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:49:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:49:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:49:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:49:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:49:05,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:49:05,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:49:05,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:49:05,890 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:49:05,890 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-10-13 17:49:05,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:49:05 BoogieIcfgContainer [2019-10-13 17:49:05,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:49:05,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:49:05,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:49:05,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:49:05,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:49:04" (1/3) ... [2019-10-13 17:49:05,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d43083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:49:05, skipping insertion in model container [2019-10-13 17:49:05,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:05" (2/3) ... [2019-10-13 17:49:05,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d43083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:49:05, skipping insertion in model container [2019-10-13 17:49:05,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:49:05" (3/3) ... [2019-10-13 17:49:05,900 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2019-10-13 17:49:05,907 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:49:05,913 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:49:05,921 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:49:05,944 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:49:05,944 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:49:05,945 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:49:05,945 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:49:05,945 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:49:05,945 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:49:05,945 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:49:05,945 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:49:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-10-13 17:49:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 17:49:05,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:05,972 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:05,975 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1174671461, now seen corresponding path program 1 times [2019-10-13 17:49:05,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:05,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775304058] [2019-10-13 17:49:05,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:05,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:05,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:06,086 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:06,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400950596] [2019-10-13 17:49:06,087 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 [2019-10-13 17:49:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 17:49:06,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:06,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775304058] [2019-10-13 17:49:06,199 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:06,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400950596] [2019-10-13 17:49:06,201 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:06,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 17:49:06,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333764596] [2019-10-13 17:49:06,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 17:49:06,207 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 17:49:06,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 17:49:06,226 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2019-10-13 17:49:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:06,265 INFO L93 Difference]: Finished difference Result 78 states and 127 transitions. [2019-10-13 17:49:06,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 17:49:06,267 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-10-13 17:49:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:06,276 INFO L225 Difference]: With dead ends: 78 [2019-10-13 17:49:06,276 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:49:06,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 17:49:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:49:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-13 17:49:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 17:49:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-10-13 17:49:06,332 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 19 [2019-10-13 17:49:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:06,332 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-10-13 17:49:06,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 17:49:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-10-13 17:49:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 17:49:06,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:06,336 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:06,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:06,540 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2144819339, now seen corresponding path program 1 times [2019-10-13 17:49:06,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:06,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517761423] [2019-10-13 17:49:06,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:06,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:06,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:06,554 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:06,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359469058] [2019-10-13 17:49:06,554 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 [2019-10-13 17:49:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:49:06,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:06,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517761423] [2019-10-13 17:49:06,646 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:06,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359469058] [2019-10-13 17:49:06,647 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:06,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:49:06,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721395563] [2019-10-13 17:49:06,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:49:06,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:06,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:49:06,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:49:06,650 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 3 states. [2019-10-13 17:49:06,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:06,749 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2019-10-13 17:49:06,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:49:06,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-13 17:49:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:06,753 INFO L225 Difference]: With dead ends: 68 [2019-10-13 17:49:06,753 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:49:06,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:49:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:49:06,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2019-10-13 17:49:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 17:49:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2019-10-13 17:49:06,773 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2019-10-13 17:49:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:06,773 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2019-10-13 17:49:06,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:49:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2019-10-13 17:49:06,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:49:06,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:06,776 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] [2019-10-13 17:49:06,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:06,981 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:06,982 INFO L82 PathProgramCache]: Analyzing trace with hash 698119250, now seen corresponding path program 1 times [2019-10-13 17:49:06,982 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:06,983 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360404036] [2019-10-13 17:49:06,983 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:06,983 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:06,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:06,992 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:06,992 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219561974] [2019-10-13 17:49:06,993 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 [2019-10-13 17:49:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:49:07,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:07,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360404036] [2019-10-13 17:49:07,070 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:07,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219561974] [2019-10-13 17:49:07,071 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:07,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:49:07,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012479501] [2019-10-13 17:49:07,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:49:07,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:07,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:49:07,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:07,073 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand 4 states. [2019-10-13 17:49:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:07,213 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2019-10-13 17:49:07,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:07,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-13 17:49:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:07,217 INFO L225 Difference]: With dead ends: 86 [2019-10-13 17:49:07,217 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 17:49:07,218 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 17:49:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2019-10-13 17:49:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 17:49:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-10-13 17:49:07,232 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 22 [2019-10-13 17:49:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:07,233 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-10-13 17:49:07,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:49:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-10-13 17:49:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 17:49:07,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:07,252 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, 1] [2019-10-13 17:49:07,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:07,461 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:07,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1063393417, now seen corresponding path program 1 times [2019-10-13 17:49:07,463 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:07,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171279345] [2019-10-13 17:49:07,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:07,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:07,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:07,472 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:07,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284775128] [2019-10-13 17:49:07,473 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 [2019-10-13 17:49:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:49:07,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:07,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171279345] [2019-10-13 17:49:07,538 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:07,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284775128] [2019-10-13 17:49:07,539 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:07,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:49:07,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615996875] [2019-10-13 17:49:07,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:49:07,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:07,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:49:07,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:07,541 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2019-10-13 17:49:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:07,635 INFO L93 Difference]: Finished difference Result 88 states and 118 transitions. [2019-10-13 17:49:07,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:07,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-13 17:49:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:07,636 INFO L225 Difference]: With dead ends: 88 [2019-10-13 17:49:07,636 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 17:49:07,637 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 [2019-10-13 17:49:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 17:49:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2019-10-13 17:49:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 17:49:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-13 17:49:07,646 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 25 [2019-10-13 17:49:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:07,646 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-13 17:49:07,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:49:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-13 17:49:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:49:07,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:07,648 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, 1, 1] [2019-10-13 17:49:07,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:07,852 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:07,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash 622834947, now seen corresponding path program 1 times [2019-10-13 17:49:07,853 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:07,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055601390] [2019-10-13 17:49:07,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:07,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:07,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:07,862 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:07,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370756092] [2019-10-13 17:49:07,862 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 [2019-10-13 17:49:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:49:07,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:07,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055601390] [2019-10-13 17:49:07,956 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:07,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370756092] [2019-10-13 17:49:07,957 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:07,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-13 17:49:07,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994638983] [2019-10-13 17:49:07,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:49:07,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:07,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:49:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:07,962 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 5 states. [2019-10-13 17:49:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:08,120 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-10-13 17:49:08,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:49:08,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-10-13 17:49:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:08,123 INFO L225 Difference]: With dead ends: 104 [2019-10-13 17:49:08,124 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 17:49:08,125 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:08,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 17:49:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2019-10-13 17:49:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 17:49:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2019-10-13 17:49:08,143 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 26 [2019-10-13 17:49:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:08,144 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2019-10-13 17:49:08,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:49:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2019-10-13 17:49:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 17:49:08,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:08,153 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, 1, 1] [2019-10-13 17:49:08,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:08,354 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:08,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:08,355 INFO L82 PathProgramCache]: Analyzing trace with hash -149575735, now seen corresponding path program 2 times [2019-10-13 17:49:08,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:08,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743753794] [2019-10-13 17:49:08,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:08,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:08,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:08,364 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:08,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924275102] [2019-10-13 17:49:08,365 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 [2019-10-13 17:49:08,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:49:08,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:08,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:49:08,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:49:08,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743753794] [2019-10-13 17:49:08,446 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:08,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924275102] [2019-10-13 17:49:08,447 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:08,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:49:08,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880479988] [2019-10-13 17:49:08,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:49:08,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:49:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:08,448 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 4 states. [2019-10-13 17:49:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:08,529 INFO L93 Difference]: Finished difference Result 95 states and 122 transitions. [2019-10-13 17:49:08,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:08,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-13 17:49:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:08,531 INFO L225 Difference]: With dead ends: 95 [2019-10-13 17:49:08,531 INFO L226 Difference]: Without dead ends: 70 [2019-10-13 17:49:08,532 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-13 17:49:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2019-10-13 17:49:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 17:49:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2019-10-13 17:49:08,541 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 27 [2019-10-13 17:49:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:08,541 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2019-10-13 17:49:08,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:49:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2019-10-13 17:49:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:49:08,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:08,543 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, 1, 1, 1, 1, 1] [2019-10-13 17:49:08,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:08,749 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:08,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:08,750 INFO L82 PathProgramCache]: Analyzing trace with hash 861197741, now seen corresponding path program 1 times [2019-10-13 17:49:08,750 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:08,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244391273] [2019-10-13 17:49:08,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:08,751 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:08,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:08,760 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:08,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220697634] [2019-10-13 17:49:08,760 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 [2019-10-13 17:49:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:08,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:49:08,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:49:08,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244391273] [2019-10-13 17:49:08,853 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:08,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220697634] [2019-10-13 17:49:08,853 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:08,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-13 17:49:08,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973801087] [2019-10-13 17:49:08,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:49:08,854 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:08,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:49:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:49:08,855 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 6 states. [2019-10-13 17:49:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:09,011 INFO L93 Difference]: Finished difference Result 124 states and 167 transitions. [2019-10-13 17:49:09,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:49:09,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-13 17:49:09,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:09,015 INFO L225 Difference]: With dead ends: 124 [2019-10-13 17:49:09,015 INFO L226 Difference]: Without dead ends: 84 [2019-10-13 17:49:09,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:49:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-13 17:49:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2019-10-13 17:49:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:49:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-10-13 17:49:09,037 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 30 [2019-10-13 17:49:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:09,038 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-10-13 17:49:09,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:49:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-10-13 17:49:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 17:49:09,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:09,042 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:49:09,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:09,249 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:09,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1609037171, now seen corresponding path program 2 times [2019-10-13 17:49:09,251 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:09,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3172063] [2019-10-13 17:49:09,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:09,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:09,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:09,259 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:09,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999513530] [2019-10-13 17:49:09,260 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 [2019-10-13 17:49:09,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:49:09,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:09,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:49:09,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:49:09,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3172063] [2019-10-13 17:49:09,355 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:09,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999513530] [2019-10-13 17:49:09,356 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:09,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:49:09,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398648607] [2019-10-13 17:49:09,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:49:09,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:09,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:49:09,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:09,360 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 4 states. [2019-10-13 17:49:09,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:09,476 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2019-10-13 17:49:09,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:09,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-10-13 17:49:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:09,479 INFO L225 Difference]: With dead ends: 101 [2019-10-13 17:49:09,479 INFO L226 Difference]: Without dead ends: 79 [2019-10-13 17:49:09,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-13 17:49:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2019-10-13 17:49:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-13 17:49:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2019-10-13 17:49:09,498 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 31 [2019-10-13 17:49:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:09,498 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2019-10-13 17:49:09,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:49:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2019-10-13 17:49:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 17:49:09,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:09,500 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-10-13 17:49:09,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:09,707 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:09,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1014230180, now seen corresponding path program 1 times [2019-10-13 17:49:09,708 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:09,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13204158] [2019-10-13 17:49:09,709 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:09,709 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:09,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:09,716 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:09,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321478498] [2019-10-13 17:49:09,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:49:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:09,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:49:09,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:49:09,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13204158] [2019-10-13 17:49:09,821 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:09,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321478498] [2019-10-13 17:49:09,821 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:09,821 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-13 17:49:09,821 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001342627] [2019-10-13 17:49:09,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:49:09,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:49:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:49:09,823 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 7 states. [2019-10-13 17:49:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:09,989 INFO L93 Difference]: Finished difference Result 148 states and 198 transitions. [2019-10-13 17:49:09,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:49:09,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-10-13 17:49:09,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:09,991 INFO L225 Difference]: With dead ends: 148 [2019-10-13 17:49:09,991 INFO L226 Difference]: Without dead ends: 103 [2019-10-13 17:49:09,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:49:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-13 17:49:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 56. [2019-10-13 17:49:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-13 17:49:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2019-10-13 17:49:10,002 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 34 [2019-10-13 17:49:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:10,002 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2019-10-13 17:49:10,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:49:10,003 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2019-10-13 17:49:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 17:49:10,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:10,006 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-10-13 17:49:10,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:10,212 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash 777904162, now seen corresponding path program 2 times [2019-10-13 17:49:10,213 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:10,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943525862] [2019-10-13 17:49:10,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:10,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:10,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:10,220 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:10,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757959559] [2019-10-13 17:49:10,220 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 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 [2019-10-13 17:49:10,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:10,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:10,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:49:10,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:49:10,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943525862] [2019-10-13 17:49:10,338 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:10,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757959559] [2019-10-13 17:49:10,339 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:10,339 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-13 17:49:10,339 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849770814] [2019-10-13 17:49:10,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:49:10,340 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:49:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:49:10,340 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 8 states. [2019-10-13 17:49:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:10,520 INFO L93 Difference]: Finished difference Result 167 states and 224 transitions. [2019-10-13 17:49:10,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:49:10,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-10-13 17:49:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:10,523 INFO L225 Difference]: With dead ends: 167 [2019-10-13 17:49:10,523 INFO L226 Difference]: Without dead ends: 118 [2019-10-13 17:49:10,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:49:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-13 17:49:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 60. [2019-10-13 17:49:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-13 17:49:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2019-10-13 17:49:10,535 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 35 [2019-10-13 17:49:10,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:10,535 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2019-10-13 17:49:10,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:49:10,536 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2019-10-13 17:49:10,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 17:49:10,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:10,537 INFO L380 BasicCegarLoop]: trace histogram [5, 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, 1, 1] [2019-10-13 17:49:10,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:10,740 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash 499493916, now seen corresponding path program 3 times [2019-10-13 17:49:10,741 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:10,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329859070] [2019-10-13 17:49:10,741 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:10,742 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:10,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:10,748 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:10,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11831363] [2019-10-13 17:49:10,748 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:10,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:49:10,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:10,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:49:10,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 17:49:10,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329859070] [2019-10-13 17:49:10,821 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:10,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11831363] [2019-10-13 17:49:10,821 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:10,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-13 17:49:10,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903086750] [2019-10-13 17:49:10,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:49:10,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:10,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:49:10,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:10,823 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand 4 states. [2019-10-13 17:49:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:10,889 INFO L93 Difference]: Finished difference Result 123 states and 155 transitions. [2019-10-13 17:49:10,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:10,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2019-10-13 17:49:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:10,890 INFO L225 Difference]: With dead ends: 123 [2019-10-13 17:49:10,890 INFO L226 Difference]: Without dead ends: 81 [2019-10-13 17:49:10,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-13 17:49:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2019-10-13 17:49:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 17:49:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2019-10-13 17:49:10,908 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 36 [2019-10-13 17:49:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:10,908 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2019-10-13 17:49:10,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:49:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2019-10-13 17:49:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 17:49:10,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:10,911 INFO L380 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:11,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:11,114 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:11,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:11,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1562608348, now seen corresponding path program 4 times [2019-10-13 17:49:11,114 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:11,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835258553] [2019-10-13 17:49:11,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:11,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:11,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:11,124 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:11,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112936656] [2019-10-13 17:49:11,125 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:11,165 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:11,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:11,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:49:11,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-13 17:49:11,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835258553] [2019-10-13 17:49:11,196 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:11,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112936656] [2019-10-13 17:49:11,197 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:11,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:49:11,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558963390] [2019-10-13 17:49:11,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:49:11,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:49:11,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:11,198 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 4 states. [2019-10-13 17:49:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:11,270 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2019-10-13 17:49:11,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:11,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-10-13 17:49:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:11,272 INFO L225 Difference]: With dead ends: 121 [2019-10-13 17:49:11,272 INFO L226 Difference]: Without dead ends: 81 [2019-10-13 17:49:11,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-13 17:49:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2019-10-13 17:49:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-13 17:49:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2019-10-13 17:49:11,287 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 47 [2019-10-13 17:49:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:11,289 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2019-10-13 17:49:11,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:49:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2019-10-13 17:49:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 17:49:11,292 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:11,292 INFO L380 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:11,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:11,495 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:11,496 INFO L82 PathProgramCache]: Analyzing trace with hash 496392870, now seen corresponding path program 1 times [2019-10-13 17:49:11,496 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:11,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172647303] [2019-10-13 17:49:11,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:11,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:11,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:11,503 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:11,504 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882460342] [2019-10-13 17:49:11,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:49:11,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:49:11,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172647303] [2019-10-13 17:49:11,625 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:11,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882460342] [2019-10-13 17:49:11,625 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:11,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-13 17:49:11,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712004156] [2019-10-13 17:49:11,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:49:11,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:11,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:49:11,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:49:11,627 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 9 states. [2019-10-13 17:49:11,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:11,958 INFO L93 Difference]: Finished difference Result 210 states and 279 transitions. [2019-10-13 17:49:11,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:49:11,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2019-10-13 17:49:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:11,960 INFO L225 Difference]: With dead ends: 210 [2019-10-13 17:49:11,960 INFO L226 Difference]: Without dead ends: 146 [2019-10-13 17:49:11,961 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:49:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-13 17:49:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 77. [2019-10-13 17:49:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:49:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2019-10-13 17:49:11,982 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 50 [2019-10-13 17:49:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:11,983 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2019-10-13 17:49:11,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:49:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2019-10-13 17:49:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:49:11,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:11,984 INFO L380 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:12,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:12,189 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:12,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:12,189 INFO L82 PathProgramCache]: Analyzing trace with hash -943715158, now seen corresponding path program 2 times [2019-10-13 17:49:12,189 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:12,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282425579] [2019-10-13 17:49:12,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:12,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:12,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:12,210 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:12,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614908344] [2019-10-13 17:49:12,211 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:12,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:12,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:12,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:49:12,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 54 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 17:49:12,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282425579] [2019-10-13 17:49:12,404 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:12,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614908344] [2019-10-13 17:49:12,404 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:12,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 17:49:12,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163983624] [2019-10-13 17:49:12,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:49:12,406 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:49:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:49:12,410 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand 10 states. [2019-10-13 17:49:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:12,653 INFO L93 Difference]: Finished difference Result 231 states and 307 transitions. [2019-10-13 17:49:12,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:49:12,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2019-10-13 17:49:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:12,656 INFO L225 Difference]: With dead ends: 231 [2019-10-13 17:49:12,656 INFO L226 Difference]: Without dead ends: 162 [2019-10-13 17:49:12,656 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:49:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-10-13 17:49:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 82. [2019-10-13 17:49:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-13 17:49:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2019-10-13 17:49:12,669 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 52 [2019-10-13 17:49:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:12,669 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2019-10-13 17:49:12,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:49:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2019-10-13 17:49:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:49:12,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:12,671 INFO L380 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:12,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:12,875 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:12,875 INFO L82 PathProgramCache]: Analyzing trace with hash 537298086, now seen corresponding path program 3 times [2019-10-13 17:49:12,876 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:12,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276430963] [2019-10-13 17:49:12,876 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:12,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:12,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:12,883 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:12,884 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101775020] [2019-10-13 17:49:12,884 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:12,924 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:49:12,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:12,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:49:12,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-10-13 17:49:12,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276430963] [2019-10-13 17:49:12,953 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:12,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101775020] [2019-10-13 17:49:12,954 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:12,954 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-13 17:49:12,954 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530274380] [2019-10-13 17:49:12,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:49:12,955 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:12,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:49:12,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:12,955 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand 5 states. [2019-10-13 17:49:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:13,067 INFO L93 Difference]: Finished difference Result 200 states and 255 transitions. [2019-10-13 17:49:13,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:49:13,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-10-13 17:49:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:13,069 INFO L225 Difference]: With dead ends: 200 [2019-10-13 17:49:13,070 INFO L226 Difference]: Without dead ends: 159 [2019-10-13 17:49:13,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:13,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-10-13 17:49:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 88. [2019-10-13 17:49:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-13 17:49:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2019-10-13 17:49:13,085 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 54 [2019-10-13 17:49:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:13,085 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2019-10-13 17:49:13,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:49:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2019-10-13 17:49:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 17:49:13,086 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:13,086 INFO L380 BasicCegarLoop]: trace histogram [14, 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, 1, 1, 1, 1, 1] [2019-10-13 17:49:13,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:13,296 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:13,297 INFO L82 PathProgramCache]: Analyzing trace with hash 136776072, now seen corresponding path program 4 times [2019-10-13 17:49:13,297 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:13,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342089874] [2019-10-13 17:49:13,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:13,298 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:13,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:13,304 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:13,305 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354579259] [2019-10-13 17:49:13,305 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:13,344 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:13,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:13,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:49:13,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-13 17:49:13,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342089874] [2019-10-13 17:49:13,374 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:13,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354579259] [2019-10-13 17:49:13,374 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:13,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:49:13,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051381861] [2019-10-13 17:49:13,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:49:13,375 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:13,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:49:13,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:13,376 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 5 states. [2019-10-13 17:49:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:13,508 INFO L93 Difference]: Finished difference Result 143 states and 182 transitions. [2019-10-13 17:49:13,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:13,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2019-10-13 17:49:13,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:13,512 INFO L225 Difference]: With dead ends: 143 [2019-10-13 17:49:13,512 INFO L226 Difference]: Without dead ends: 91 [2019-10-13 17:49:13,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:49:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-13 17:49:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2019-10-13 17:49:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-13 17:49:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2019-10-13 17:49:13,533 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 60 [2019-10-13 17:49:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:13,533 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2019-10-13 17:49:13,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:49:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2019-10-13 17:49:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 17:49:13,535 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:13,535 INFO L380 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:13,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:13,743 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:13,743 INFO L82 PathProgramCache]: Analyzing trace with hash 618282852, now seen corresponding path program 1 times [2019-10-13 17:49:13,744 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:13,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167998546] [2019-10-13 17:49:13,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:13,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:13,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:13,750 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:13,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462850480] [2019-10-13 17:49:13,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:13,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:49:13,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 69 proven. 28 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-13 17:49:13,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167998546] [2019-10-13 17:49:13,905 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:13,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462850480] [2019-10-13 17:49:13,906 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:13,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-13 17:49:13,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774425956] [2019-10-13 17:49:13,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:49:13,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:13,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:49:13,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:49:13,908 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand 11 states. [2019-10-13 17:49:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:14,189 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2019-10-13 17:49:14,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:49:14,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2019-10-13 17:49:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:14,191 INFO L225 Difference]: With dead ends: 292 [2019-10-13 17:49:14,191 INFO L226 Difference]: Without dead ends: 210 [2019-10-13 17:49:14,192 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:49:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-10-13 17:49:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 95. [2019-10-13 17:49:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-13 17:49:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2019-10-13 17:49:14,207 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 62 [2019-10-13 17:49:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:14,208 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2019-10-13 17:49:14,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:49:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2019-10-13 17:49:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 17:49:14,209 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:14,209 INFO L380 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:14,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:14,412 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:14,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:14,413 INFO L82 PathProgramCache]: Analyzing trace with hash 976817256, now seen corresponding path program 2 times [2019-10-13 17:49:14,415 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:14,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113977211] [2019-10-13 17:49:14,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:14,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:14,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:14,429 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:14,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671186291] [2019-10-13 17:49:14,429 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:14,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:14,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:14,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:49:14,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:49:14,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113977211] [2019-10-13 17:49:14,630 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:14,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671186291] [2019-10-13 17:49:14,630 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:14,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-13 17:49:14,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980232299] [2019-10-13 17:49:14,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:49:14,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:14,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:49:14,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:49:14,631 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 12 states. [2019-10-13 17:49:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:14,954 INFO L93 Difference]: Finished difference Result 318 states and 423 transitions. [2019-10-13 17:49:14,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:49:14,954 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2019-10-13 17:49:14,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:14,956 INFO L225 Difference]: With dead ends: 318 [2019-10-13 17:49:14,956 INFO L226 Difference]: Without dead ends: 231 [2019-10-13 17:49:14,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:49:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-10-13 17:49:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 100. [2019-10-13 17:49:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-13 17:49:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2019-10-13 17:49:14,974 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 64 [2019-10-13 17:49:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:14,975 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2019-10-13 17:49:14,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:49:14,975 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2019-10-13 17:49:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 17:49:14,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:14,976 INFO L380 BasicCegarLoop]: trace histogram [18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:15,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:15,180 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:15,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:15,181 INFO L82 PathProgramCache]: Analyzing trace with hash 47941988, now seen corresponding path program 3 times [2019-10-13 17:49:15,181 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:15,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862745126] [2019-10-13 17:49:15,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:15,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:15,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:15,188 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:15,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832194641] [2019-10-13 17:49:15,189 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:15,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:49:15,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:15,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:49:15,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-10-13 17:49:15,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862745126] [2019-10-13 17:49:15,262 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:15,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832194641] [2019-10-13 17:49:15,262 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:15,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:49:15,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728949130] [2019-10-13 17:49:15,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:49:15,263 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:15,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:49:15,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:15,264 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand 4 states. [2019-10-13 17:49:15,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:15,361 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2019-10-13 17:49:15,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:15,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-10-13 17:49:15,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:15,363 INFO L225 Difference]: With dead ends: 200 [2019-10-13 17:49:15,363 INFO L226 Difference]: Without dead ends: 155 [2019-10-13 17:49:15,364 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-10-13 17:49:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 101. [2019-10-13 17:49:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-13 17:49:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2019-10-13 17:49:15,379 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 66 [2019-10-13 17:49:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:15,380 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2019-10-13 17:49:15,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:49:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2019-10-13 17:49:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-13 17:49:15,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:15,381 INFO L380 BasicCegarLoop]: trace histogram [18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:15,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:15,584 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1227180503, now seen corresponding path program 1 times [2019-10-13 17:49:15,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:15,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145748717] [2019-10-13 17:49:15,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:15,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:15,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:15,601 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:15,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950935287] [2019-10-13 17:49:15,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:15,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:49:15,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 105 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:49:15,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145748717] [2019-10-13 17:49:15,782 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:15,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950935287] [2019-10-13 17:49:15,782 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:15,782 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-13 17:49:15,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033784784] [2019-10-13 17:49:15,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:49:15,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:15,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:49:15,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:49:15,784 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand 13 states. [2019-10-13 17:49:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:16,133 INFO L93 Difference]: Finished difference Result 319 states and 415 transitions. [2019-10-13 17:49:16,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:49:16,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2019-10-13 17:49:16,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:16,135 INFO L225 Difference]: With dead ends: 319 [2019-10-13 17:49:16,135 INFO L226 Difference]: Without dead ends: 226 [2019-10-13 17:49:16,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:49:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-10-13 17:49:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 106. [2019-10-13 17:49:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-13 17:49:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2019-10-13 17:49:16,152 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 69 [2019-10-13 17:49:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:16,153 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2019-10-13 17:49:16,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:49:16,153 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2019-10-13 17:49:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 17:49:16,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:16,154 INFO L380 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:16,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:16,358 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:16,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:16,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1956340827, now seen corresponding path program 2 times [2019-10-13 17:49:16,359 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:16,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371250758] [2019-10-13 17:49:16,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:16,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:16,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:16,366 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:16,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736817704] [2019-10-13 17:49:16,366 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:16,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:16,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:16,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:49:16,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 126 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-13 17:49:16,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371250758] [2019-10-13 17:49:16,599 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:16,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736817704] [2019-10-13 17:49:16,599 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:16,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-13 17:49:16,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659028120] [2019-10-13 17:49:16,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:49:16,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:16,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:49:16,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:49:16,601 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 14 states. [2019-10-13 17:49:16,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:16,963 INFO L93 Difference]: Finished difference Result 342 states and 445 transitions. [2019-10-13 17:49:16,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:49:16,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-10-13 17:49:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:16,965 INFO L225 Difference]: With dead ends: 342 [2019-10-13 17:49:16,966 INFO L226 Difference]: Without dead ends: 244 [2019-10-13 17:49:16,967 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:49:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-10-13 17:49:16,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 111. [2019-10-13 17:49:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-13 17:49:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2019-10-13 17:49:16,992 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 71 [2019-10-13 17:49:16,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:16,993 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2019-10-13 17:49:16,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:49:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2019-10-13 17:49:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-13 17:49:16,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:16,995 INFO L380 BasicCegarLoop]: trace histogram [22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:17,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:17,200 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1128664105, now seen corresponding path program 3 times [2019-10-13 17:49:17,201 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:17,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838853426] [2019-10-13 17:49:17,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:17,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:17,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:17,207 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:17,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637599165] [2019-10-13 17:49:17,207 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:17,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:49:17,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:17,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:49:17,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2019-10-13 17:49:17,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838853426] [2019-10-13 17:49:17,320 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:17,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637599165] [2019-10-13 17:49:17,321 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:17,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-13 17:49:17,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015111587] [2019-10-13 17:49:17,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:49:17,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:17,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:49:17,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:17,323 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand 5 states. [2019-10-13 17:49:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:17,475 INFO L93 Difference]: Finished difference Result 262 states and 332 transitions. [2019-10-13 17:49:17,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:49:17,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2019-10-13 17:49:17,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:17,477 INFO L225 Difference]: With dead ends: 262 [2019-10-13 17:49:17,478 INFO L226 Difference]: Without dead ends: 216 [2019-10-13 17:49:17,478 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:49:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-13 17:49:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 117. [2019-10-13 17:49:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 17:49:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 144 transitions. [2019-10-13 17:49:17,499 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 144 transitions. Word has length 73 [2019-10-13 17:49:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:17,499 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 144 transitions. [2019-10-13 17:49:17,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:49:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 144 transitions. [2019-10-13 17:49:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-13 17:49:17,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:17,500 INFO L380 BasicCegarLoop]: trace histogram [22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:17,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:17,704 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:17,704 INFO L82 PathProgramCache]: Analyzing trace with hash 8781671, now seen corresponding path program 4 times [2019-10-13 17:49:17,705 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:17,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712137212] [2019-10-13 17:49:17,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:17,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:17,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:17,711 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:17,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792622447] [2019-10-13 17:49:17,711 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:17,759 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:17,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:17,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:49:17,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-13 17:49:17,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712137212] [2019-10-13 17:49:17,805 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:17,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792622447] [2019-10-13 17:49:17,805 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:17,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-13 17:49:17,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891125144] [2019-10-13 17:49:17,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:49:17,806 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:17,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:49:17,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:49:17,807 INFO L87 Difference]: Start difference. First operand 117 states and 144 transitions. Second operand 7 states. [2019-10-13 17:49:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:17,983 INFO L93 Difference]: Finished difference Result 200 states and 254 transitions. [2019-10-13 17:49:17,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:49:17,984 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2019-10-13 17:49:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:17,985 INFO L225 Difference]: With dead ends: 200 [2019-10-13 17:49:17,985 INFO L226 Difference]: Without dead ends: 127 [2019-10-13 17:49:17,985 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:49:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-13 17:49:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-10-13 17:49:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-13 17:49:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2019-10-13 17:49:18,008 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 79 [2019-10-13 17:49:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:18,008 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2019-10-13 17:49:18,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:49:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2019-10-13 17:49:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 17:49:18,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:18,010 INFO L380 BasicCegarLoop]: trace histogram [22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:18,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:18,215 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:18,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1423979302, now seen corresponding path program 5 times [2019-10-13 17:49:18,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:18,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46852936] [2019-10-13 17:49:18,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:18,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:18,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:18,227 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:18,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473128161] [2019-10-13 17:49:18,227 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true