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/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:16:50,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:16:50,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:16:50,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:16:50,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:16:50,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:16:50,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:16:50,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:16:50,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:16:50,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:16:50,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:16:50,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:16:50,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:16:50,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:16:50,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:16:50,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:16:50,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:16:50,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:16:50,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:16:50,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:16:50,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:16:50,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:16:50,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:16:50,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:16:50,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:16:50,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:16:50,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:16:50,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:16:50,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:16:50,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:16:50,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:16:50,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:16:50,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:16:50,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:16:50,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:16:50,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:16:50,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:16:50,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:16:50,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:16:50,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:16:50,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:16:50,944 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 19:16:50,962 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:16:50,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:16:50,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:16:50,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:16:50,965 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:16:50,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:16:50,965 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:16:50,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:16:50,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:16:50,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:16:50,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:16:50,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:16:50,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:16:50,968 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:16:50,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:16:50,969 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:16:50,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:16:50,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:16:50,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:16:50,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:16:50,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:16:50,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:16:50,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:16:50,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:16:50,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:16:50,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:16:50,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:16:50,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:16:50,971 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:16:51,244 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:16:51,253 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:16:51,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:16:51,259 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:16:51,259 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:16:51,260 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-10-13 19:16:51,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3354c71f/5607f1e7bd864e8884d35929aeb59a05/FLAG4355d6e04 [2019-10-13 19:16:51,799 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:16:51,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-10-13 19:16:51,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3354c71f/5607f1e7bd864e8884d35929aeb59a05/FLAG4355d6e04 [2019-10-13 19:16:52,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3354c71f/5607f1e7bd864e8884d35929aeb59a05 [2019-10-13 19:16:52,163 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:16:52,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:16:52,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:52,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:16:52,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:16:52,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:52" (1/1) ... [2019-10-13 19:16:52,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5420840d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52, skipping insertion in model container [2019-10-13 19:16:52,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:52" (1/1) ... [2019-10-13 19:16:52,180 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:16:52,201 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:16:52,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:52,382 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:16:52,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:52,409 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:16:52,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52 WrapperNode [2019-10-13 19:16:52,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:52,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:16:52,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:16:52,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:16:52,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52" (1/1) ... [2019-10-13 19:16:52,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52" (1/1) ... [2019-10-13 19:16:52,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52" (1/1) ... [2019-10-13 19:16:52,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52" (1/1) ... [2019-10-13 19:16:52,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52" (1/1) ... [2019-10-13 19:16:52,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52" (1/1) ... [2019-10-13 19:16:52,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52" (1/1) ... [2019-10-13 19:16:52,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:16:52,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:16:52,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:16:52,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:16:52,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52" (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 19:16:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:16:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:16:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:16:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:16:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:16:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:16:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:16:52,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:16:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:16:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:16:52,731 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:16:52,731 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 19:16:52,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:52 BoogieIcfgContainer [2019-10-13 19:16:52,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:16:52,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:16:52,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:16:52,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:16:52,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:52" (1/3) ... [2019-10-13 19:16:52,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1790e222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:52, skipping insertion in model container [2019-10-13 19:16:52,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52" (2/3) ... [2019-10-13 19:16:52,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1790e222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:52, skipping insertion in model container [2019-10-13 19:16:52,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:52" (3/3) ... [2019-10-13 19:16:52,741 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2019-10-13 19:16:52,748 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:16:52,755 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:16:52,766 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:16:52,791 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:16:52,791 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:16:52,791 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:16:52,791 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:16:52,791 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:16:52,792 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:16:52,792 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:16:52,792 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:16:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-13 19:16:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 19:16:52,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:52,818 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:52,820 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:52,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:52,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-10-13 19:16:52,831 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:52,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080631768] [2019-10-13 19:16:52,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:52,920 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:52,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23108284] [2019-10-13 19:16:52,921 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 19:16:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:52,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:16:52,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:53,061 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 19:16:53,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080631768] [2019-10-13 19:16:53,062 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:53,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23108284] [2019-10-13 19:16:53,063 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:16:53,063 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:16:53,063 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295638047] [2019-10-13 19:16:53,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:16:53,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:53,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:16:53,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:16:53,089 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-10-13 19:16:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:53,157 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-13 19:16:53,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:16:53,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-13 19:16:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:53,171 INFO L225 Difference]: With dead ends: 26 [2019-10-13 19:16:53,172 INFO L226 Difference]: Without dead ends: 13 [2019-10-13 19:16:53,179 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 19:16:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-13 19:16:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-13 19:16:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-13 19:16:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-13 19:16:53,211 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-13 19:16:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:53,212 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-13 19:16:53,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:16:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-13 19:16:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 19:16:53,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:53,213 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:53,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:53,415 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:53,416 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-10-13 19:16:53,416 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:53,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637895170] [2019-10-13 19:16:53,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:53,434 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:53,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168647387] [2019-10-13 19:16:53,435 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 19:16:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:53,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:16:53,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:53,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:53,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637895170] [2019-10-13 19:16:53,577 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:53,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168647387] [2019-10-13 19:16:53,577 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:53,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-13 19:16:53,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836574502] [2019-10-13 19:16:53,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:16:53,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:16:53,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:16:53,581 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-10-13 19:16:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:53,652 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-10-13 19:16:53,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:16:53,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-13 19:16:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:53,653 INFO L225 Difference]: With dead ends: 17 [2019-10-13 19:16:53,654 INFO L226 Difference]: Without dead ends: 14 [2019-10-13 19:16:53,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:16:53,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-13 19:16:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-13 19:16:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-13 19:16:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-13 19:16:53,660 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-13 19:16:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:53,660 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-13 19:16:53,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:16:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-13 19:16:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 19:16:53,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:53,662 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:53,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:53,868 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-10-13 19:16:53,869 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:53,870 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895682729] [2019-10-13 19:16:53,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:53,887 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:53,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51053417] [2019-10-13 19:16:53,888 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 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 19:16:53,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:16:53,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:53,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 19:16:53,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:53,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:53,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895682729] [2019-10-13 19:16:53,993 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:53,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51053417] [2019-10-13 19:16:53,993 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:53,993 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-13 19:16:53,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305375569] [2019-10-13 19:16:53,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:16:53,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:53,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:16:53,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:16:53,998 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-10-13 19:16:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:54,066 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-13 19:16:54,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:16:54,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-10-13 19:16:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:54,068 INFO L225 Difference]: With dead ends: 18 [2019-10-13 19:16:54,068 INFO L226 Difference]: Without dead ends: 15 [2019-10-13 19:16:54,068 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:16:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-13 19:16:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-13 19:16:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-13 19:16:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-13 19:16:54,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-13 19:16:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:54,080 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-13 19:16:54,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:16:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-13 19:16:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:16:54,081 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:54,081 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:54,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:54,283 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:54,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:54,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-10-13 19:16:54,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:54,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844301890] [2019-10-13 19:16:54,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:54,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:54,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:54,298 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:54,299 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954224088] [2019-10-13 19:16:54,299 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 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 19:16:54,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:16:54,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:54,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 19:16:54,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:54,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:54,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844301890] [2019-10-13 19:16:54,419 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:54,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954224088] [2019-10-13 19:16:54,419 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:54,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-13 19:16:54,420 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467474947] [2019-10-13 19:16:54,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:16:54,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:16:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:16:54,421 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-10-13 19:16:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:54,496 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-13 19:16:54,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:16:54,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-13 19:16:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:54,498 INFO L225 Difference]: With dead ends: 19 [2019-10-13 19:16:54,498 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 19:16:54,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:16:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 19:16:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 19:16:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 19:16:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-13 19:16:54,504 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-13 19:16:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:54,504 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-13 19:16:54,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:16:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-13 19:16:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:16:54,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:54,505 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:54,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:54,717 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:54,717 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-10-13 19:16:54,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:54,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846905338] [2019-10-13 19:16:54,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:54,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:54,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:54,731 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:54,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978017969] [2019-10-13 19:16:54,732 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 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 19:16:54,805 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:16:54,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:54,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 19:16:54,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:54,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:54,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846905338] [2019-10-13 19:16:54,882 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:54,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978017969] [2019-10-13 19:16:54,883 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:54,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-13 19:16:54,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78630556] [2019-10-13 19:16:54,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:16:54,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:54,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:16:54,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:16:54,884 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-10-13 19:16:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:54,947 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-13 19:16:54,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:16:54,947 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-13 19:16:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:54,948 INFO L225 Difference]: With dead ends: 20 [2019-10-13 19:16:54,948 INFO L226 Difference]: Without dead ends: 17 [2019-10-13 19:16:54,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:16:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-13 19:16:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-13 19:16:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-13 19:16:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-13 19:16:54,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-10-13 19:16:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:54,953 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-13 19:16:54,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:16:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-13 19:16:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:16:54,954 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:54,954 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:55,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:55,158 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:55,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-10-13 19:16:55,159 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:55,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311574396] [2019-10-13 19:16:55,159 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:55,182 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:55,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351082493] [2019-10-13 19:16:55,182 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 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 19:16:55,223 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 19:16:55,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:55,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-13 19:16:55,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:55,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:55,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311574396] [2019-10-13 19:16:55,325 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:55,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351082493] [2019-10-13 19:16:55,325 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:55,326 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-13 19:16:55,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302372858] [2019-10-13 19:16:55,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:16:55,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:55,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:16:55,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:16:55,327 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-10-13 19:16:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:55,411 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-13 19:16:55,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:16:55,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-13 19:16:55,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:55,412 INFO L225 Difference]: With dead ends: 21 [2019-10-13 19:16:55,412 INFO L226 Difference]: Without dead ends: 18 [2019-10-13 19:16:55,413 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:16:55,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-13 19:16:55,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-13 19:16:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-13 19:16:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-13 19:16:55,418 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-13 19:16:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:55,418 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-13 19:16:55,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:16:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-13 19:16:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 19:16:55,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:55,419 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:55,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:55,620 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:55,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-10-13 19:16:55,621 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:55,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167687915] [2019-10-13 19:16:55,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,622 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:55,639 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:55,640 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397036503] [2019-10-13 19:16:55,640 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 19:16:55,688 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 19:16:55,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:55,690 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-13 19:16:55,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:55,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:55,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167687915] [2019-10-13 19:16:55,810 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:55,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397036503] [2019-10-13 19:16:55,810 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:55,811 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 19:16:55,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404595682] [2019-10-13 19:16:55,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:16:55,812 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:55,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:16:55,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:16:55,812 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-10-13 19:16:55,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:55,891 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-13 19:16:55,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:16:55,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-10-13 19:16:55,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:55,892 INFO L225 Difference]: With dead ends: 22 [2019-10-13 19:16:55,893 INFO L226 Difference]: Without dead ends: 19 [2019-10-13 19:16:55,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:16:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-13 19:16:55,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-13 19:16:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 19:16:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-13 19:16:55,898 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-13 19:16:55,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:55,899 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-13 19:16:55,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:16:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-13 19:16:55,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:16:55,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:55,900 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:56,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:56,105 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:56,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:56,106 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-10-13 19:16:56,106 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:56,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477358802] [2019-10-13 19:16:56,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:56,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:56,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:56,120 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:56,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964492004] [2019-10-13 19:16:56,121 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 19:16:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:56,162 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-13 19:16:56,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:56,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:56,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477358802] [2019-10-13 19:16:56,289 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:56,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964492004] [2019-10-13 19:16:56,289 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:56,289 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-13 19:16:56,290 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777189314] [2019-10-13 19:16:56,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:16:56,291 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:56,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:16:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:16:56,291 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-10-13 19:16:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:56,449 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-13 19:16:56,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:16:56,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-10-13 19:16:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:56,450 INFO L225 Difference]: With dead ends: 23 [2019-10-13 19:16:56,450 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 19:16:56,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:16:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 19:16:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 19:16:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 19:16:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-13 19:16:56,455 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-10-13 19:16:56,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:56,456 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-13 19:16:56,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:16:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-13 19:16:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 19:16:56,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:56,457 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:56,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:56,660 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:56,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:56,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-10-13 19:16:56,662 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:56,662 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185311184] [2019-10-13 19:16:56,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:56,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:56,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:56,674 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:56,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268722289] [2019-10-13 19:16:56,675 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 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 19:16:56,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:16:56,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:56,708 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-13 19:16:56,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:56,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:56,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185311184] [2019-10-13 19:16:56,847 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:56,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268722289] [2019-10-13 19:16:56,847 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:56,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-13 19:16:56,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635315430] [2019-10-13 19:16:56,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:16:56,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:56,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:16:56,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:16:56,849 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-10-13 19:16:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:56,971 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-13 19:16:56,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:16:56,972 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-10-13 19:16:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:56,973 INFO L225 Difference]: With dead ends: 24 [2019-10-13 19:16:56,973 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 19:16:56,973 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:16:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 19:16:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 19:16:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 19:16:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-13 19:16:56,978 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-10-13 19:16:56,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:56,978 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-13 19:16:56,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:16:56,979 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-13 19:16:56,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:16:56,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:56,979 INFO L380 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:57,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:57,184 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:57,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-10-13 19:16:57,185 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:57,185 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067459111] [2019-10-13 19:16:57,185 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,185 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:57,197 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:57,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434866345] [2019-10-13 19:16:57,197 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 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 19:16:57,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 19:16:57,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:57,252 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-13 19:16:57,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:57,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:57,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067459111] [2019-10-13 19:16:57,399 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:57,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434866345] [2019-10-13 19:16:57,400 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:57,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-13 19:16:57,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020147200] [2019-10-13 19:16:57,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:16:57,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:16:57,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:16:57,401 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-10-13 19:16:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:57,564 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-13 19:16:57,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:16:57,564 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-10-13 19:16:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:57,565 INFO L225 Difference]: With dead ends: 25 [2019-10-13 19:16:57,565 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 19:16:57,566 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:16:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 19:16:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 19:16:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 19:16:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-13 19:16:57,570 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-10-13 19:16:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:57,571 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-13 19:16:57,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:16:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-13 19:16:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 19:16:57,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:57,572 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:57,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:57,777 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:57,778 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-10-13 19:16:57,778 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:57,778 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938176588] [2019-10-13 19:16:57,779 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,779 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:57,797 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:57,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431829990] [2019-10-13 19:16:57,798 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 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 19:16:57,884 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:16:57,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:57,885 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-13 19:16:57,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:58,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:58,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938176588] [2019-10-13 19:16:58,051 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:58,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431829990] [2019-10-13 19:16:58,051 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:58,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-13 19:16:58,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548952206] [2019-10-13 19:16:58,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:16:58,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:58,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:16:58,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:16:58,053 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-10-13 19:16:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:58,194 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-13 19:16:58,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:16:58,195 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-10-13 19:16:58,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:58,195 INFO L225 Difference]: With dead ends: 26 [2019-10-13 19:16:58,195 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 19:16:58,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:16:58,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 19:16:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 19:16:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 19:16:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-13 19:16:58,201 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-10-13 19:16:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:58,201 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-13 19:16:58,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:16:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-13 19:16:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 19:16:58,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:58,202 INFO L380 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:58,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:58,406 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-10-13 19:16:58,407 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:58,407 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805290973] [2019-10-13 19:16:58,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:58,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:58,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:58,420 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:58,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877433575] [2019-10-13 19:16:58,420 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 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 19:16:58,461 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-13 19:16:58,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:58,463 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-13 19:16:58,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:58,633 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:58,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805290973] [2019-10-13 19:16:58,655 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:58,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877433575] [2019-10-13 19:16:58,656 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:58,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-13 19:16:58,656 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601421613] [2019-10-13 19:16:58,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:16:58,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:16:58,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:16:58,658 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-10-13 19:16:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:58,853 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-13 19:16:58,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:16:58,854 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-10-13 19:16:58,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:58,855 INFO L225 Difference]: With dead ends: 27 [2019-10-13 19:16:58,858 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 19:16:58,859 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:16:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 19:16:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-13 19:16:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 19:16:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-13 19:16:58,869 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-10-13 19:16:58,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:58,869 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-13 19:16:58,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:16:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-13 19:16:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 19:16:58,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:58,873 INFO L380 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:59,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:59,086 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:59,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-10-13 19:16:59,087 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:59,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040348412] [2019-10-13 19:16:59,087 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:59,088 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:59,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:59,123 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:59,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165971749] [2019-10-13 19:16:59,124 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 19:16:59,203 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 19:16:59,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:59,206 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-13 19:16:59,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:59,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:59,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040348412] [2019-10-13 19:16:59,431 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:59,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165971749] [2019-10-13 19:16:59,432 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:59,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-13 19:16:59,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038777834] [2019-10-13 19:16:59,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:16:59,433 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:59,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:16:59,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:16:59,433 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-10-13 19:16:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:59,623 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-13 19:16:59,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:16:59,624 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-10-13 19:16:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:59,625 INFO L225 Difference]: With dead ends: 28 [2019-10-13 19:16:59,625 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 19:16:59,625 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:16:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 19:16:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-13 19:16:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 19:16:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-13 19:16:59,631 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-10-13 19:16:59,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:59,631 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-13 19:16:59,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:16:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-13 19:16:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 19:16:59,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:59,632 INFO L380 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:59,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:59,836 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-10-13 19:16:59,837 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:59,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167348539] [2019-10-13 19:16:59,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:59,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:59,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:59,850 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:59,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157834928] [2019-10-13 19:16:59,851 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 19:16:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:59,894 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-13 19:16:59,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:00,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:00,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167348539] [2019-10-13 19:17:00,101 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:00,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157834928] [2019-10-13 19:17:00,101 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:00,101 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-13 19:17:00,102 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631503245] [2019-10-13 19:17:00,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 19:17:00,102 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:00,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 19:17:00,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:17:00,103 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-10-13 19:17:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:00,280 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-13 19:17:00,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 19:17:00,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-13 19:17:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:00,281 INFO L225 Difference]: With dead ends: 29 [2019-10-13 19:17:00,281 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 19:17:00,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:17:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 19:17:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 19:17:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 19:17:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-13 19:17:00,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-10-13 19:17:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:00,287 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-13 19:17:00,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 19:17:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-13 19:17:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 19:17:00,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:00,288 INFO L380 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:00,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:00,492 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:00,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-10-13 19:17:00,493 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:00,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735267976] [2019-10-13 19:17:00,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:00,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:00,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:00,506 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:00,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757428130] [2019-10-13 19:17:00,507 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 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 19:17:00,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:00,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:00,558 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-13 19:17:00,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:00,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:00,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735267976] [2019-10-13 19:17:00,825 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:00,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757428130] [2019-10-13 19:17:00,825 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:00,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-13 19:17:00,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128711255] [2019-10-13 19:17:00,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 19:17:00,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:00,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 19:17:00,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:17:00,827 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-10-13 19:17:01,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:01,064 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-13 19:17:01,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 19:17:01,065 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-10-13 19:17:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:01,065 INFO L225 Difference]: With dead ends: 30 [2019-10-13 19:17:01,066 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 19:17:01,066 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:17:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 19:17:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 19:17:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 19:17:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-13 19:17:01,071 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-10-13 19:17:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:01,071 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-13 19:17:01,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 19:17:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-13 19:17:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 19:17:01,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:01,072 INFO L380 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:01,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:01,276 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:01,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:01,277 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-10-13 19:17:01,277 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:01,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828725666] [2019-10-13 19:17:01,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:01,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:01,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:01,289 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:01,289 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487998879] [2019-10-13 19:17:01,289 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 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 19:17:01,375 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 19:17:01,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:01,377 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-13 19:17:01,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:01,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:01,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828725666] [2019-10-13 19:17:01,620 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:01,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487998879] [2019-10-13 19:17:01,620 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:01,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-13 19:17:01,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251986778] [2019-10-13 19:17:01,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:17:01,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:01,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:17:01,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:17:01,622 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-10-13 19:17:01,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:01,910 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-13 19:17:01,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:17:01,914 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-10-13 19:17:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:01,915 INFO L225 Difference]: With dead ends: 31 [2019-10-13 19:17:01,915 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 19:17:01,915 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:17:01,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 19:17:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-13 19:17:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 19:17:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-13 19:17:01,921 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-10-13 19:17:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:01,921 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-13 19:17:01,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:17:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-13 19:17:01,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 19:17:01,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:01,922 INFO L380 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:02,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:02,131 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:02,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:02,132 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-10-13 19:17:02,132 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:02,132 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087648325] [2019-10-13 19:17:02,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:02,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:02,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:02,151 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:02,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917802096] [2019-10-13 19:17:02,151 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 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 19:17:02,289 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:02,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:02,290 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-13 19:17:02,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:02,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:02,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087648325] [2019-10-13 19:17:02,558 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:02,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917802096] [2019-10-13 19:17:02,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:02,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-13 19:17:02,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023206312] [2019-10-13 19:17:02,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:17:02,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:02,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:17:02,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:17:02,561 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-10-13 19:17:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:02,823 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-13 19:17:02,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 19:17:02,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-10-13 19:17:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:02,825 INFO L225 Difference]: With dead ends: 32 [2019-10-13 19:17:02,825 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 19:17:02,826 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:17:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 19:17:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-13 19:17:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 19:17:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-13 19:17:02,832 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-10-13 19:17:02,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:02,832 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-13 19:17:02,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:17:02,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-13 19:17:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:17:02,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:02,833 INFO L380 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:03,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:03,037 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-10-13 19:17:03,037 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:03,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805160538] [2019-10-13 19:17:03,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:03,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:03,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:03,049 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:03,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898788405] [2019-10-13 19:17:03,049 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 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 19:17:03,109 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-13 19:17:03,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:03,112 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-10-13 19:17:03,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:03,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:03,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805160538] [2019-10-13 19:17:03,415 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:03,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898788405] [2019-10-13 19:17:03,416 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:03,416 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-13 19:17:03,416 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619711936] [2019-10-13 19:17:03,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 19:17:03,417 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 19:17:03,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:17:03,418 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-10-13 19:17:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:03,756 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-13 19:17:03,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 19:17:03,757 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-10-13 19:17:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:03,758 INFO L225 Difference]: With dead ends: 33 [2019-10-13 19:17:03,758 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 19:17:03,759 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:17:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 19:17:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-13 19:17:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 19:17:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-13 19:17:03,765 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-10-13 19:17:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:03,765 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-13 19:17:03,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 19:17:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-13 19:17:03,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 19:17:03,766 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:03,766 INFO L380 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:03,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:03,969 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:03,970 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-10-13 19:17:03,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:03,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083211278] [2019-10-13 19:17:03,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:03,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:03,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:03,993 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:03,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611964257] [2019-10-13 19:17:03,993 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 19:17:04,054 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-13 19:17:04,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:04,055 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-13 19:17:04,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:04,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:04,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083211278] [2019-10-13 19:17:04,354 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:04,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611964257] [2019-10-13 19:17:04,354 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:04,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-13 19:17:04,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486984069] [2019-10-13 19:17:04,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 19:17:04,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:04,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 19:17:04,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:17:04,356 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-10-13 19:17:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:04,643 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-13 19:17:04,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 19:17:04,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-10-13 19:17:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:04,644 INFO L225 Difference]: With dead ends: 34 [2019-10-13 19:17:04,645 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 19:17:04,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:17:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 19:17:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-13 19:17:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 19:17:04,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-13 19:17:04,650 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-10-13 19:17:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:04,650 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-13 19:17:04,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 19:17:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-13 19:17:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:17:04,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:04,651 INFO L380 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:04,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:04,855 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:04,856 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-10-13 19:17:04,856 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:04,856 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875493235] [2019-10-13 19:17:04,856 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:04,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:04,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:04,866 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:04,866 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789078113] [2019-10-13 19:17:04,867 INFO L92 rtionOrderModulation]: Changing assertion order to 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 19:17:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:04,923 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-13 19:17:04,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:05,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:05,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875493235] [2019-10-13 19:17:05,292 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:05,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789078113] [2019-10-13 19:17:05,292 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:05,292 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-13 19:17:05,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030885024] [2019-10-13 19:17:05,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 19:17:05,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:05,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 19:17:05,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:17:05,294 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-10-13 19:17:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:05,685 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-13 19:17:05,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 19:17:05,685 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-13 19:17:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:05,686 INFO L225 Difference]: With dead ends: 35 [2019-10-13 19:17:05,686 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 19:17:05,687 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:17:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 19:17:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-13 19:17:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 19:17:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-13 19:17:05,691 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-10-13 19:17:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:05,692 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-13 19:17:05,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 19:17:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-13 19:17:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 19:17:05,693 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:05,693 INFO L380 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:05,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:05,896 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:05,897 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-10-13 19:17:05,897 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:05,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581436867] [2019-10-13 19:17:05,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:05,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:05,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:05,907 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:05,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248544425] [2019-10-13 19:17:05,908 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 19:17:05,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:05,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:05,995 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-10-13 19:17:05,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:06,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:06,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581436867] [2019-10-13 19:17:06,359 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:06,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248544425] [2019-10-13 19:17:06,359 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:06,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-13 19:17:06,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058244717] [2019-10-13 19:17:06,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 19:17:06,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 19:17:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:17:06,361 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-10-13 19:17:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:06,757 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-13 19:17:06,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 19:17:06,758 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-13 19:17:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:06,759 INFO L225 Difference]: With dead ends: 36 [2019-10-13 19:17:06,759 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 19:17:06,760 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-10-13 19:17:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 19:17:06,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-13 19:17:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:17:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-13 19:17:06,765 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-10-13 19:17:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:06,765 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-13 19:17:06,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 19:17:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-13 19:17:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:17:06,766 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:06,766 INFO L380 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:06,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:06,970 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:06,970 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-10-13 19:17:06,971 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:06,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482020363] [2019-10-13 19:17:06,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:06,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:06,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:06,981 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:06,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921022915] [2019-10-13 19:17:06,982 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 19:17:07,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-13 19:17:07,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:07,132 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-13 19:17:07,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:07,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:07,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482020363] [2019-10-13 19:17:07,500 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:07,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921022915] [2019-10-13 19:17:07,500 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:07,501 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-13 19:17:07,501 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281340506] [2019-10-13 19:17:07,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 19:17:07,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 19:17:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-13 19:17:07,503 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-10-13 19:17:07,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:07,912 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-10-13 19:17:07,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 19:17:07,913 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-10-13 19:17:07,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:07,913 INFO L225 Difference]: With dead ends: 37 [2019-10-13 19:17:07,913 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 19:17:07,914 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-10-13 19:17:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 19:17:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-13 19:17:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 19:17:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-13 19:17:07,919 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-10-13 19:17:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:07,920 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-13 19:17:07,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 19:17:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-13 19:17:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 19:17:07,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:07,920 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:08,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:08,124 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:08,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-10-13 19:17:08,124 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:08,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990933103] [2019-10-13 19:17:08,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:08,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:08,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:08,133 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:08,133 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757704450] [2019-10-13 19:17:08,133 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 19:17:08,317 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:08,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:08,319 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-10-13 19:17:08,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:08,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:08,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990933103] [2019-10-13 19:17:08,708 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:08,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757704450] [2019-10-13 19:17:08,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:08,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-13 19:17:08,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278793634] [2019-10-13 19:17:08,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 19:17:08,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:08,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 19:17:08,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-10-13 19:17:08,710 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-10-13 19:17:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:09,178 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-10-13 19:17:09,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 19:17:09,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-10-13 19:17:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:09,179 INFO L225 Difference]: With dead ends: 38 [2019-10-13 19:17:09,179 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 19:17:09,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:17:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 19:17:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-13 19:17:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 19:17:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-13 19:17:09,186 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-10-13 19:17:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:09,186 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-13 19:17:09,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 19:17:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-13 19:17:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 19:17:09,187 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:09,187 INFO L380 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:09,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:09,389 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:09,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-10-13 19:17:09,390 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:09,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745586279] [2019-10-13 19:17:09,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:09,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:09,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:09,410 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:09,410 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149976899] [2019-10-13 19:17:09,410 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 [2019-10-13 19:17:09,478 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-13 19:17:09,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:09,480 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-10-13 19:17:09,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:09,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:09,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745586279] [2019-10-13 19:17:09,925 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:09,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149976899] [2019-10-13 19:17:09,926 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:09,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-13 19:17:09,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250499874] [2019-10-13 19:17:09,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 19:17:09,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 19:17:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:17:09,928 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-10-13 19:17:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:10,451 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-13 19:17:10,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 19:17:10,452 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-10-13 19:17:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:10,453 INFO L225 Difference]: With dead ends: 39 [2019-10-13 19:17:10,453 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 19:17:10,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:17:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 19:17:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-13 19:17:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 19:17:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-13 19:17:10,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-10-13 19:17:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:10,459 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-13 19:17:10,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 19:17:10,459 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-13 19:17:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 19:17:10,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:10,460 INFO L380 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:10,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:10,664 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-10-13 19:17:10,665 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:10,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493783620] [2019-10-13 19:17:10,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:10,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:10,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:10,675 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:10,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204422745] [2019-10-13 19:17:10,675 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:10,759 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 19:17:10,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:10,761 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-13 19:17:10,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:11,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:11,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493783620] [2019-10-13 19:17:11,233 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:11,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204422745] [2019-10-13 19:17:11,233 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:11,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-13 19:17:11,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371707801] [2019-10-13 19:17:11,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 19:17:11,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 19:17:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:17:11,234 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-10-13 19:17:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:11,796 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-10-13 19:17:11,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 19:17:11,797 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-10-13 19:17:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:11,797 INFO L225 Difference]: With dead ends: 40 [2019-10-13 19:17:11,798 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 19:17:11,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-10-13 19:17:11,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 19:17:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-13 19:17:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 19:17:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-10-13 19:17:11,803 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-10-13 19:17:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:11,803 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-10-13 19:17:11,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 19:17:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-10-13 19:17:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 19:17:11,804 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:11,804 INFO L380 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:12,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:12,005 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:12,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-10-13 19:17:12,006 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:12,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700762910] [2019-10-13 19:17:12,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:12,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:12,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:12,015 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:12,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750685980] [2019-10-13 19:17:12,016 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:12,079 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-13 19:17:12,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:12,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:12,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700762910] [2019-10-13 19:17:12,542 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:12,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750685980] [2019-10-13 19:17:12,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:12,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-13 19:17:12,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754531441] [2019-10-13 19:17:12,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-13 19:17:12,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:12,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-13 19:17:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-10-13 19:17:12,544 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-10-13 19:17:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:13,093 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-10-13 19:17:13,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 19:17:13,093 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-10-13 19:17:13,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:13,094 INFO L225 Difference]: With dead ends: 41 [2019-10-13 19:17:13,094 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 19:17:13,095 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-10-13 19:17:13,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 19:17:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-13 19:17:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 19:17:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-13 19:17:13,101 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-10-13 19:17:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:13,101 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-13 19:17:13,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-13 19:17:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-13 19:17:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 19:17:13,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:13,102 INFO L380 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:13,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:13,305 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:13,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-10-13 19:17:13,306 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:13,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603255712] [2019-10-13 19:17:13,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:13,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:13,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:13,315 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:13,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770572041] [2019-10-13 19:17:13,316 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:13,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:13,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:13,412 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-13 19:17:13,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:13,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:13,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603255712] [2019-10-13 19:17:13,915 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:13,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770572041] [2019-10-13 19:17:13,916 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:13,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-13 19:17:13,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395290410] [2019-10-13 19:17:13,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 19:17:13,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:13,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 19:17:13,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-10-13 19:17:13,917 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-10-13 19:17:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:14,502 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-13 19:17:14,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 19:17:14,502 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-10-13 19:17:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:14,503 INFO L225 Difference]: With dead ends: 42 [2019-10-13 19:17:14,503 INFO L226 Difference]: Without dead ends: 39 [2019-10-13 19:17:14,504 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-10-13 19:17:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-13 19:17:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-13 19:17:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 19:17:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-10-13 19:17:14,509 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-10-13 19:17:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:14,509 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-10-13 19:17:14,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 19:17:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-10-13 19:17:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 19:17:14,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:14,509 INFO L380 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:14,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:14,710 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:14,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-10-13 19:17:14,711 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:14,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939729414] [2019-10-13 19:17:14,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:14,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:14,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:14,721 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:14,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866009602] [2019-10-13 19:17:14,722 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:15,057 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-13 19:17:15,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:15,060 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-10-13 19:17:15,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:15,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:15,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939729414] [2019-10-13 19:17:15,568 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:15,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866009602] [2019-10-13 19:17:15,568 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:15,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-13 19:17:15,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124528135] [2019-10-13 19:17:15,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 19:17:15,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:15,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 19:17:15,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-10-13 19:17:15,570 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-10-13 19:17:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:16,206 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-13 19:17:16,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 19:17:16,206 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-10-13 19:17:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:16,207 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:17:16,207 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 19:17:16,208 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-10-13 19:17:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 19:17:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-13 19:17:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 19:17:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-13 19:17:16,213 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-10-13 19:17:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:16,214 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-13 19:17:16,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 19:17:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-13 19:17:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 19:17:16,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:16,214 INFO L380 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:16,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:16,418 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:16,419 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-10-13 19:17:16,419 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:16,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126338723] [2019-10-13 19:17:16,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:16,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:16,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:16,429 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:16,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966761240] [2019-10-13 19:17:16,429 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:16,692 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:16,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:16,695 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-10-13 19:17:16,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:17,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:17,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126338723] [2019-10-13 19:17:17,256 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:17,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966761240] [2019-10-13 19:17:17,256 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:17,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-13 19:17:17,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582455648] [2019-10-13 19:17:17,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 19:17:17,257 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 19:17:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-10-13 19:17:17,258 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-10-13 19:17:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:17,944 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-10-13 19:17:17,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 19:17:17,944 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-10-13 19:17:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:17,945 INFO L225 Difference]: With dead ends: 44 [2019-10-13 19:17:17,945 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 19:17:17,946 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 19:17:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 19:17:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-13 19:17:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 19:17:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-10-13 19:17:17,951 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-10-13 19:17:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:17,951 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-10-13 19:17:17,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 19:17:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-10-13 19:17:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 19:17:17,952 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:17,952 INFO L380 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:18,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:18,156 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:18,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-10-13 19:17:18,157 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:18,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067612610] [2019-10-13 19:17:18,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:18,158 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:18,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:18,166 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:18,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779509725] [2019-10-13 19:17:18,166 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:18,251 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-13 19:17:18,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:18,254 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-10-13 19:17:18,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:18,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:18,826 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067612610] [2019-10-13 19:17:18,826 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:18,826 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779509725] [2019-10-13 19:17:18,827 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:18,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-10-13 19:17:18,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624575651] [2019-10-13 19:17:18,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 19:17:18,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:18,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 19:17:18,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 19:17:18,828 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-10-13 19:17:19,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:19,555 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-10-13 19:17:19,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-13 19:17:19,556 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-10-13 19:17:19,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:19,557 INFO L225 Difference]: With dead ends: 45 [2019-10-13 19:17:19,557 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 19:17:19,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 19:17:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 19:17:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-13 19:17:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 19:17:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-10-13 19:17:19,563 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-10-13 19:17:19,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:19,563 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-10-13 19:17:19,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 19:17:19,563 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-10-13 19:17:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:17:19,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:19,564 INFO L380 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:19,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:19,764 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:19,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:19,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-10-13 19:17:19,765 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:19,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236073694] [2019-10-13 19:17:19,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:19,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:19,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:19,775 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:19,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497622387] [2019-10-13 19:17:19,775 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:19,943 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-13 19:17:19,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:19,947 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-10-13 19:17:19,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:20,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:20,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236073694] [2019-10-13 19:17:20,567 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:20,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497622387] [2019-10-13 19:17:20,568 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:20,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-13 19:17:20,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766707124] [2019-10-13 19:17:20,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-13 19:17:20,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:20,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-13 19:17:20,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 19:17:20,569 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-10-13 19:17:21,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:21,339 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-10-13 19:17:21,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-13 19:17:21,343 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-10-13 19:17:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:21,344 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:17:21,344 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 19:17:21,345 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 19:17:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 19:17:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-13 19:17:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 19:17:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-10-13 19:17:21,349 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-10-13 19:17:21,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:21,350 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-10-13 19:17:21,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-13 19:17:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-10-13 19:17:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:17:21,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:21,351 INFO L380 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:21,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:21,555 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:21,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-10-13 19:17:21,556 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:21,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105849454] [2019-10-13 19:17:21,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:21,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:21,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:21,566 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:21,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326046070] [2019-10-13 19:17:21,566 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:21,664 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-10-13 19:17:21,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:22,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:22,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105849454] [2019-10-13 19:17:22,307 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:22,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326046070] [2019-10-13 19:17:22,307 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:22,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-10-13 19:17:22,307 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956775656] [2019-10-13 19:17:22,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 19:17:22,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:22,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 19:17:22,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 19:17:22,309 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-10-13 19:17:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:23,128 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-13 19:17:23,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 19:17:23,128 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-13 19:17:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:23,129 INFO L225 Difference]: With dead ends: 47 [2019-10-13 19:17:23,129 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 19:17:23,130 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 19:17:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 19:17:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-13 19:17:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 19:17:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-13 19:17:23,135 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-10-13 19:17:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:23,136 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-13 19:17:23,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 19:17:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-13 19:17:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 19:17:23,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:23,136 INFO L380 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:23,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:23,337 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:23,338 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-10-13 19:17:23,339 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:23,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324929414] [2019-10-13 19:17:23,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:23,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:23,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:23,348 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:23,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406879028] [2019-10-13 19:17:23,348 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:23,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:23,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:23,430 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-10-13 19:17:23,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:24,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:24,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324929414] [2019-10-13 19:17:24,148 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:24,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406879028] [2019-10-13 19:17:24,148 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:24,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-13 19:17:24,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503676454] [2019-10-13 19:17:24,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 19:17:24,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 19:17:24,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 19:17:24,149 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-10-13 19:17:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:25,451 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-13 19:17:25,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 19:17:25,451 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-10-13 19:17:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:25,452 INFO L225 Difference]: With dead ends: 48 [2019-10-13 19:17:25,452 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 19:17:25,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 19:17:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 19:17:25,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-13 19:17:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 19:17:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-10-13 19:17:25,458 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-10-13 19:17:25,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:25,458 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-10-13 19:17:25,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 19:17:25,458 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-10-13 19:17:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 19:17:25,459 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:25,459 INFO L380 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:25,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:25,663 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:25,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-10-13 19:17:25,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:25,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160561349] [2019-10-13 19:17:25,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:25,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:25,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:25,674 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:25,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638599321] [2019-10-13 19:17:25,674 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:26,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-13 19:17:26,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:26,366 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-10-13 19:17:26,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:27,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:27,137 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160561349] [2019-10-13 19:17:27,138 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:27,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638599321] [2019-10-13 19:17:27,138 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:27,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-10-13 19:17:27,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933978337] [2019-10-13 19:17:27,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 19:17:27,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:27,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 19:17:27,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 19:17:27,140 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-10-13 19:17:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:28,041 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-10-13 19:17:28,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-13 19:17:28,041 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-10-13 19:17:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:28,042 INFO L225 Difference]: With dead ends: 49 [2019-10-13 19:17:28,042 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 19:17:28,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 19:17:28,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 19:17:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-13 19:17:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 19:17:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-13 19:17:28,049 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-10-13 19:17:28,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:28,049 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-13 19:17:28,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 19:17:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-13 19:17:28,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 19:17:28,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:28,050 INFO L380 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:28,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:28,254 INFO L410 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:28,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:28,254 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-10-13 19:17:28,255 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:28,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744531799] [2019-10-13 19:17:28,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:28,264 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:28,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452167908] [2019-10-13 19:17:28,264 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:28,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:28,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:28,584 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-10-13 19:17:28,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:29,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:29,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744531799] [2019-10-13 19:17:29,337 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:29,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452167908] [2019-10-13 19:17:29,337 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:29,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-10-13 19:17:29,337 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110269402] [2019-10-13 19:17:29,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-13 19:17:29,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:29,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-13 19:17:29,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 19:17:29,338 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-10-13 19:17:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:30,321 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-10-13 19:17:30,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 19:17:30,322 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-10-13 19:17:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:30,322 INFO L225 Difference]: With dead ends: 50 [2019-10-13 19:17:30,322 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:17:30,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 19:17:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:17:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-13 19:17:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 19:17:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-10-13 19:17:30,328 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-10-13 19:17:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:30,329 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-10-13 19:17:30,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-13 19:17:30,329 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-10-13 19:17:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:17:30,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:30,330 INFO L380 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:30,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:30,533 INFO L410 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:30,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:30,534 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-10-13 19:17:30,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:30,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524877439] [2019-10-13 19:17:30,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:30,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:30,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:30,543 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:30,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341565445] [2019-10-13 19:17:30,543 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:30,663 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-13 19:17:30,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:30,666 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-10-13 19:17:30,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:31,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:31,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524877439] [2019-10-13 19:17:31,767 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:31,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341565445] [2019-10-13 19:17:31,768 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:31,768 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-10-13 19:17:31,768 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372278449] [2019-10-13 19:17:31,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-13 19:17:31,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:31,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-13 19:17:31,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 19:17:31,769 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-10-13 19:17:32,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:32,831 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-13 19:17:32,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-13 19:17:32,832 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-10-13 19:17:32,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:32,832 INFO L225 Difference]: With dead ends: 51 [2019-10-13 19:17:32,832 INFO L226 Difference]: Without dead ends: 48 [2019-10-13 19:17:32,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 19:17:32,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-13 19:17:32,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-13 19:17:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 19:17:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-13 19:17:32,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-10-13 19:17:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:32,844 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-13 19:17:32,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-13 19:17:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-13 19:17:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 19:17:32,844 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:32,844 INFO L380 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:33,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:33,045 INFO L410 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-10-13 19:17:33,046 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:33,046 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954751724] [2019-10-13 19:17:33,047 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:33,047 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:33,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:33,056 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:33,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381678732] [2019-10-13 19:17:33,056 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:33,298 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-13 19:17:33,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:33,302 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-10-13 19:17:33,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:34,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:34,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954751724] [2019-10-13 19:17:34,103 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:34,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381678732] [2019-10-13 19:17:34,103 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:34,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-10-13 19:17:34,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847087901] [2019-10-13 19:17:34,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-13 19:17:34,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:34,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-13 19:17:34,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 19:17:34,105 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-10-13 19:17:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:35,220 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-10-13 19:17:35,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 19:17:35,220 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-10-13 19:17:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:35,221 INFO L225 Difference]: With dead ends: 52 [2019-10-13 19:17:35,221 INFO L226 Difference]: Without dead ends: 49 [2019-10-13 19:17:35,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 19:17:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-13 19:17:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-13 19:17:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 19:17:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-13 19:17:35,228 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-10-13 19:17:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:35,228 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-13 19:17:35,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-13 19:17:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-13 19:17:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 19:17:35,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:35,229 INFO L380 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:35,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:35,432 INFO L410 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-10-13 19:17:35,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:35,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719467882] [2019-10-13 19:17:35,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:35,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:35,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:35,443 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:35,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964468228] [2019-10-13 19:17:35,444 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:35,591 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-10-13 19:17:35,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:36,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:36,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719467882] [2019-10-13 19:17:36,611 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:36,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964468228] [2019-10-13 19:17:36,611 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:36,611 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-10-13 19:17:36,611 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717369144] [2019-10-13 19:17:36,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-13 19:17:36,612 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:36,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-13 19:17:36,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 19:17:36,613 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-10-13 19:17:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:37,774 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-10-13 19:17:37,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-13 19:17:37,774 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-10-13 19:17:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:37,775 INFO L225 Difference]: With dead ends: 53 [2019-10-13 19:17:37,775 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 19:17:37,776 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 19:17:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 19:17:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-13 19:17:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 19:17:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-10-13 19:17:37,782 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-10-13 19:17:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:37,783 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-10-13 19:17:37,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-13 19:17:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-10-13 19:17:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 19:17:37,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:37,784 INFO L380 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:37,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:37,987 INFO L410 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:37,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-10-13 19:17:37,988 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:37,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554879130] [2019-10-13 19:17:37,989 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:37,989 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:37,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:37,998 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:37,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530544296] [2019-10-13 19:17:37,998 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:38,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:38,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:38,137 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-10-13 19:17:38,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:39,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:39,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554879130] [2019-10-13 19:17:39,281 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:39,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530544296] [2019-10-13 19:17:39,282 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:39,282 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-10-13 19:17:39,282 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84707537] [2019-10-13 19:17:39,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-13 19:17:39,283 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:39,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-13 19:17:39,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 19:17:39,284 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states.