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.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:16:50,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:16:50,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:16:50,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:16:50,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:16:50,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:16:50,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:16:50,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:16:50,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:16:50,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:16:50,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:16:50,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:16:50,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:16:50,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:16:50,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:16:50,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:16:50,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:16:50,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:16:50,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:16:50,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:16:50,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:16:50,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:16:50,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:16:50,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:16:50,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:16:50,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:16:50,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:16:50,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:16:50,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:16:50,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:16:50,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:16:50,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:16:50,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:16:50,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:16:50,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:16:50,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:16:50,516 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 19:16:50,530 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:16:50,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:16:50,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:16:50,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:16:50,532 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:16:50,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:16:50,533 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:16:50,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:16:50,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:16:50,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:16:50,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:16:50,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:16:50,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:16:50,534 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:16:50,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:16:50,535 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:16:50,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:16:50,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:16:50,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:16:50,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:16:50,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:16:50,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:16:50,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:16:50,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:16:50,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:16:50,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:16:50,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:16:50,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:16:50,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:16:50,808 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:16:50,825 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:16:50,828 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:16:50,830 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:16:50,830 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:16:50,831 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-10-13 19:16:50,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74c486525/c1e47b13c51e44468710df4901a32a13/FLAGd879da351 [2019-10-13 19:16:51,370 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:16:51,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-10-13 19:16:51,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74c486525/c1e47b13c51e44468710df4901a32a13/FLAGd879da351 [2019-10-13 19:16:51,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74c486525/c1e47b13c51e44468710df4901a32a13 [2019-10-13 19:16:51,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:16:51,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:16:51,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:51,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:16:51,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:16:51,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe1f76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51, skipping insertion in model container [2019-10-13 19:16:51,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,755 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:16:51,778 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:16:51,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:51,966 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:16:51,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:52,002 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:16:52,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:52 WrapperNode [2019-10-13 19:16:52,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:52,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:16:52,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:16:52,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:16:52,089 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 19:16:52,089 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 19:16:52,097 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 19:16:52,097 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 19:16:52,108 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 19:16:52,111 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 19:16:52,115 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 19:16:52,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:16:52,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:16:52,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:16:52,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:16:52,118 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 19:16:52,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:16:52,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:16:52,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:16:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:16:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:16:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:16:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:16:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:16:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:16:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:16:52,405 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:16:52,405 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 19:16:52,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:52 BoogieIcfgContainer [2019-10-13 19:16:52,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:16:52,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:16:52,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:16:52,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:16:52,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:51" (1/3) ... [2019-10-13 19:16:52,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4a1d73 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 19:16:52,419 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 19:16:52,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4a1d73 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 19:16:52,420 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 19:16:52,422 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2019-10-13 19:16:52,453 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:16:52,473 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:16:52,488 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:16:52,515 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:16:52,515 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:16:52,515 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:16:52,516 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:16:52,516 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:16:52,516 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:16:52,516 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:16:52,516 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:16:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-13 19:16:52,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:16:52,546 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:52,547 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:52,549 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:52,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1720236422, now seen corresponding path program 1 times [2019-10-13 19:16:52,561 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:52,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641211019] [2019-10-13 19:16:52,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:52,648 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:52,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971909497] [2019-10-13 19:16:52,649 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 19:16:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:52,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-13 19:16:52,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:52,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:52,907 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 19:16:52,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641211019] [2019-10-13 19:16:52,908 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:52,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971909497] [2019-10-13 19:16:52,909 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:16:52,910 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 19:16:52,910 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033680353] [2019-10-13 19:16:52,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:16:52,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:52,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:16:52,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:16:52,933 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 9 states. [2019-10-13 19:16:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:53,139 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-10-13 19:16:53,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:16:53,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-13 19:16:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:53,152 INFO L225 Difference]: With dead ends: 41 [2019-10-13 19:16:53,153 INFO L226 Difference]: Without dead ends: 18 [2019-10-13 19:16:53,157 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:16:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-13 19:16:53,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-13 19:16:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-13 19:16:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-13 19:16:53,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-13 19:16:53,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:53,199 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-13 19:16:53,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:16:53,199 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-13 19:16:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 19:16:53,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:53,200 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:53,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:53,404 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:53,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:53,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1787659072, now seen corresponding path program 1 times [2019-10-13 19:16:53,406 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:53,406 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704052813] [2019-10-13 19:16:53,407 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,407 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:53,423 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:53,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106110115] [2019-10-13 19:16:53,424 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 19:16:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:53,459 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-13 19:16:53,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:53,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:53,619 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 19:16:53,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704052813] [2019-10-13 19:16:53,620 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:53,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106110115] [2019-10-13 19:16:53,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:53,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 19:16:53,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700332745] [2019-10-13 19:16:53,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:16:53,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:53,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:16:53,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:16:53,628 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-10-13 19:16:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:53,742 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-13 19:16:53,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:16:53,742 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-10-13 19:16:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:53,743 INFO L225 Difference]: With dead ends: 22 [2019-10-13 19:16:53,743 INFO L226 Difference]: Without dead ends: 19 [2019-10-13 19:16:53,744 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 19:16:53,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-13 19:16:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-13 19:16:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 19:16:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-13 19:16:53,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-13 19:16:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:53,749 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-13 19:16:53,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:16:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-13 19:16:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:16:53,751 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:53,751 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:53,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:53,954 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash -417206074, now seen corresponding path program 2 times [2019-10-13 19:16:53,955 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:53,955 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869787715] [2019-10-13 19:16:53,956 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:53,971 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:53,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455585045] [2019-10-13 19:16:53,972 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 19:16:54,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:16:54,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:54,012 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-13 19:16:54,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:54,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:54,168 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 19:16:54,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869787715] [2019-10-13 19:16:54,168 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:54,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455585045] [2019-10-13 19:16:54,169 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:54,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-13 19:16:54,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467199619] [2019-10-13 19:16:54,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:16:54,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:54,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:16:54,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:16:54,172 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-10-13 19:16:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:54,281 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-13 19:16:54,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:16:54,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-10-13 19:16:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:54,283 INFO L225 Difference]: With dead ends: 23 [2019-10-13 19:16:54,283 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 19:16:54,283 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 19:16:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 19:16:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 19:16:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 19:16:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-13 19:16:54,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-10-13 19:16:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:54,292 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-13 19:16:54,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:16:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-13 19:16:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 19:16:54,293 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:54,293 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:54,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:54,494 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:54,494 INFO L82 PathProgramCache]: Analyzing trace with hash -48548864, now seen corresponding path program 3 times [2019-10-13 19:16:54,495 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:54,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131155500] [2019-10-13 19:16:54,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:54,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:54,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:54,511 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:54,511 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110466818] [2019-10-13 19:16:54,511 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 19:16:54,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:16:54,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:54,561 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-13 19:16:54,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:54,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:54,716 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 19:16:54,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131155500] [2019-10-13 19:16:54,717 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:54,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110466818] [2019-10-13 19:16:54,717 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:54,717 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-13 19:16:54,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709057188] [2019-10-13 19:16:54,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:16:54,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:54,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:16:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:16:54,719 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-10-13 19:16:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:54,831 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-13 19:16:54,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:16:54,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-10-13 19:16:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:54,832 INFO L225 Difference]: With dead ends: 24 [2019-10-13 19:16:54,832 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 19:16:54,833 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 19:16:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 19:16:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 19:16:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 19:16:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-13 19:16:54,838 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-10-13 19:16:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:54,838 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-13 19:16:54,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:16:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-13 19:16:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:16:54,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:54,839 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:55,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:55,041 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1505077242, now seen corresponding path program 4 times [2019-10-13 19:16:55,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:55,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604355890] [2019-10-13 19:16:55,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:55,057 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:55,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186608261] [2019-10-13 19:16:55,057 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 19:16:55,140 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:16:55,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:55,141 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-13 19:16:55,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:55,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:55,303 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 19:16:55,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604355890] [2019-10-13 19:16:55,304 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:55,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186608261] [2019-10-13 19:16:55,305 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:55,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-13 19:16:55,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810696571] [2019-10-13 19:16:55,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:16:55,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:16:55,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:16:55,307 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-10-13 19:16:55,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:55,475 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-13 19:16:55,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:16:55,476 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-10-13 19:16:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:55,477 INFO L225 Difference]: With dead ends: 25 [2019-10-13 19:16:55,477 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 19:16:55,478 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 19:16:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 19:16:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 19:16:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 19:16:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-13 19:16:55,484 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-10-13 19:16:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:55,484 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-13 19:16:55,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:16:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-13 19:16:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 19:16:55,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:55,486 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:55,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:55,689 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash 587183296, now seen corresponding path program 5 times [2019-10-13 19:16:55,691 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:55,691 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30670802] [2019-10-13 19:16:55,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:55,714 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:55,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207236984] [2019-10-13 19:16:55,715 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 19:16:55,760 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 19:16:55,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:55,762 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-13 19:16:55,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:55,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:55,973 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 19:16:55,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30670802] [2019-10-13 19:16:55,974 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:55,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207236984] [2019-10-13 19:16:55,975 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:55,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-13 19:16:55,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754677123] [2019-10-13 19:16:55,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:16:55,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:55,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:16:55,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:16:55,977 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-10-13 19:16:56,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:56,156 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-13 19:16:56,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:16:56,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-10-13 19:16:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:56,158 INFO L225 Difference]: With dead ends: 26 [2019-10-13 19:16:56,158 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 19:16:56,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:16:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 19:16:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 19:16:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 19:16:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-13 19:16:56,167 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-10-13 19:16:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:56,168 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-13 19:16:56,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:16:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-13 19:16:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 19:16:56,171 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:56,171 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:56,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:56,373 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:56,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1022750534, now seen corresponding path program 6 times [2019-10-13 19:16:56,374 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:56,374 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602265662] [2019-10-13 19:16:56,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:56,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:56,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:56,390 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:56,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223602967] [2019-10-13 19:16:56,390 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 19:16:56,438 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 19:16:56,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:56,440 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-13 19:16:56,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:56,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:56,612 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 19:16:56,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602265662] [2019-10-13 19:16:56,613 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:56,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223602967] [2019-10-13 19:16:56,614 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:56,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-13 19:16:56,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117092700] [2019-10-13 19:16:56,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:16:56,615 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:16:56,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:16:56,615 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-10-13 19:16:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:56,816 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-13 19:16:56,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:16:56,816 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-10-13 19:16:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:56,817 INFO L225 Difference]: With dead ends: 27 [2019-10-13 19:16:56,818 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 19:16:56,818 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 19:16:56,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 19:16:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-13 19:16:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 19:16:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-13 19:16:56,824 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-10-13 19:16:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:56,824 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-13 19:16:56,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:16:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-13 19:16:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 19:16:56,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:56,825 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:57,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:57,035 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1640433024, now seen corresponding path program 7 times [2019-10-13 19:16:57,035 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:57,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712098948] [2019-10-13 19:16:57,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:57,046 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:57,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663028534] [2019-10-13 19:16:57,047 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 19:16:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:57,102 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-13 19:16:57,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:57,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:57,320 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 19:16:57,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712098948] [2019-10-13 19:16:57,320 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:57,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663028534] [2019-10-13 19:16:57,321 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:57,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-13 19:16:57,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991585578] [2019-10-13 19:16:57,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:16:57,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:57,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:16:57,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:16:57,323 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-10-13 19:16:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:57,513 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-13 19:16:57,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:16:57,514 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-10-13 19:16:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:57,515 INFO L225 Difference]: With dead ends: 28 [2019-10-13 19:16:57,516 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 19:16:57,517 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 19:16:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 19:16:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-13 19:16:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 19:16:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-13 19:16:57,522 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-10-13 19:16:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:57,523 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-13 19:16:57,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:16:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-13 19:16:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 19:16:57,524 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:57,524 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:57,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:57,728 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:57,728 INFO L82 PathProgramCache]: Analyzing trace with hash -686246266, now seen corresponding path program 8 times [2019-10-13 19:16:57,729 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:57,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150287760] [2019-10-13 19:16:57,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:57,747 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:57,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048022413] [2019-10-13 19:16:57,747 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 19:16:57,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:16:57,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:57,791 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-13 19:16:57,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:57,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:58,010 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 19:16:58,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150287760] [2019-10-13 19:16:58,010 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:58,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048022413] [2019-10-13 19:16:58,011 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:58,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-13 19:16:58,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667501652] [2019-10-13 19:16:58,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 19:16:58,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:58,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 19:16:58,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:16:58,012 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-10-13 19:16:58,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:58,248 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-13 19:16:58,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 19:16:58,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-13 19:16:58,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:58,249 INFO L225 Difference]: With dead ends: 29 [2019-10-13 19:16:58,249 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 19:16:58,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:16:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 19:16:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 19:16:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 19:16:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-13 19:16:58,255 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-10-13 19:16:58,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:58,255 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-13 19:16:58,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 19:16:58,256 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-13 19:16:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 19:16:58,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:58,256 INFO L380 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:58,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:58,466 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:58,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:58,467 INFO L82 PathProgramCache]: Analyzing trace with hash 201139776, now seen corresponding path program 9 times [2019-10-13 19:16:58,468 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:58,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097549986] [2019-10-13 19:16:58,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:58,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:58,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:58,495 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:58,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756213583] [2019-10-13 19:16:58,496 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 19:16:58,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 19:16:58,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:58,569 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-13 19:16:58,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:58,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:58,892 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 19:16:58,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097549986] [2019-10-13 19:16:58,893 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:58,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756213583] [2019-10-13 19:16:58,894 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:58,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-13 19:16:58,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269490660] [2019-10-13 19:16:58,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 19:16:58,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:58,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 19:16:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:16:58,897 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-10-13 19:16:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:59,177 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-13 19:16:59,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 19:16:59,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-10-13 19:16:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:59,179 INFO L225 Difference]: With dead ends: 30 [2019-10-13 19:16:59,179 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 19:16:59,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:16:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 19:16:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 19:16:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 19:16:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-13 19:16:59,193 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-10-13 19:16:59,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:59,193 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-13 19:16:59,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 19:16:59,193 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-13 19:16:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 19:16:59,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:59,196 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:59,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:59,408 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1940303302, now seen corresponding path program 10 times [2019-10-13 19:16:59,409 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:59,410 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87921444] [2019-10-13 19:16:59,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:59,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:59,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:59,422 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:59,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48229124] [2019-10-13 19:16:59,423 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 19:16:59,547 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:16:59,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:59,549 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-13 19:16:59,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:59,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:59,799 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 19:16:59,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87921444] [2019-10-13 19:16:59,800 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:59,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48229124] [2019-10-13 19:16:59,800 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:59,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-13 19:16:59,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471358451] [2019-10-13 19:16:59,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:16:59,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:16:59,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:16:59,801 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-10-13 19:17:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:00,093 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-13 19:17:00,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:17:00,093 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-10-13 19:17:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:00,094 INFO L225 Difference]: With dead ends: 31 [2019-10-13 19:17:00,094 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 19:17:00,095 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 19:17:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 19:17:00,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-13 19:17:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 19:17:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-13 19:17:00,100 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-10-13 19:17:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:00,101 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-13 19:17:00,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:17:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-13 19:17:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 19:17:00,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:00,102 INFO L380 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:00,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:00,305 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash 19797760, now seen corresponding path program 11 times [2019-10-13 19:17:00,306 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:00,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465222435] [2019-10-13 19:17:00,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:00,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:00,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:00,319 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:00,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422565086] [2019-10-13 19:17:00,319 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 19:17:00,367 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-13 19:17:00,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:00,369 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-13 19:17:00,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:00,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:00,635 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 19:17:00,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465222435] [2019-10-13 19:17:00,635 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:00,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422565086] [2019-10-13 19:17:00,636 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:00,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-13 19:17:00,636 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87658626] [2019-10-13 19:17:00,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:17:00,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:00,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:17:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:17:00,637 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-10-13 19:17:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:00,939 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-13 19:17:00,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 19:17:00,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-10-13 19:17:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:00,941 INFO L225 Difference]: With dead ends: 32 [2019-10-13 19:17:00,941 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 19:17:00,942 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 19:17:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 19:17:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-13 19:17:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 19:17:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-13 19:17:00,948 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-10-13 19:17:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:00,948 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-13 19:17:00,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:17:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-13 19:17:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:17:00,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:00,949 INFO L380 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:01,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:01,153 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash 613668102, now seen corresponding path program 12 times [2019-10-13 19:17:01,154 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:01,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883781786] [2019-10-13 19:17:01,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:01,155 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:01,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:01,166 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:01,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526681404] [2019-10-13 19:17:01,166 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 19:17:01,242 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 19:17:01,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:01,244 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-13 19:17:01,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:01,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:01,609 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 19:17:01,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883781786] [2019-10-13 19:17:01,610 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:01,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526681404] [2019-10-13 19:17:01,610 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:01,610 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-13 19:17:01,610 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056616939] [2019-10-13 19:17:01,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 19:17:01,611 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:01,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 19:17:01,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:17:01,612 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 22 states. [2019-10-13 19:17:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:01,942 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-13 19:17:01,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 19:17:01,942 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-10-13 19:17:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:01,944 INFO L225 Difference]: With dead ends: 33 [2019-10-13 19:17:01,944 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 19:17:01,945 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:17:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 19:17:01,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-13 19:17:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 19:17:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-13 19:17:01,950 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-10-13 19:17:01,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:01,950 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-13 19:17:01,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 19:17:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-13 19:17:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 19:17:01,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:01,951 INFO L380 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:02,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:02,155 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:02,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779520, now seen corresponding path program 13 times [2019-10-13 19:17:02,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:02,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565414265] [2019-10-13 19:17:02,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:02,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:02,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:02,174 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:02,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425888359] [2019-10-13 19:17:02,175 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 19:17:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:02,230 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-13 19:17:02,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:02,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:02,544 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 19:17:02,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565414265] [2019-10-13 19:17:02,545 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:02,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425888359] [2019-10-13 19:17:02,545 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:02,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-13 19:17:02,545 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453836923] [2019-10-13 19:17:02,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 19:17:02,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:02,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 19:17:02,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:17:02,547 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-10-13 19:17:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:02,890 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-13 19:17:02,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 19:17:02,890 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-10-13 19:17:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:02,891 INFO L225 Difference]: With dead ends: 34 [2019-10-13 19:17:02,891 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 19:17:02,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:17:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 19:17:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-13 19:17:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 19:17:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-13 19:17:02,896 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-10-13 19:17:02,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:02,897 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-13 19:17:02,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 19:17:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-13 19:17:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:17:02,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:02,901 INFO L380 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:03,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:03,104 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1322527814, now seen corresponding path program 14 times [2019-10-13 19:17:03,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:03,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538108597] [2019-10-13 19:17:03,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:03,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:03,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:03,122 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:03,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181372351] [2019-10-13 19:17:03,124 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 19:17:03,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:03,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:03,205 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-13 19:17:03,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:03,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:03,511 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 19:17:03,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538108597] [2019-10-13 19:17:03,512 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:03,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181372351] [2019-10-13 19:17:03,512 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:03,512 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-13 19:17:03,512 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574953506] [2019-10-13 19:17:03,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 19:17:03,513 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 19:17:03,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:17:03,513 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-10-13 19:17:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:03,856 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-13 19:17:03,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 19:17:03,861 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-13 19:17:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:03,862 INFO L225 Difference]: With dead ends: 35 [2019-10-13 19:17:03,862 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 19:17:03,863 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 19:17:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 19:17:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-13 19:17:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 19:17:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-13 19:17:03,871 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-10-13 19:17:03,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:03,872 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-13 19:17:03,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 19:17:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-13 19:17:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 19:17:03,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:03,873 INFO L380 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:04,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:04,074 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:04,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1951373184, now seen corresponding path program 15 times [2019-10-13 19:17:04,074 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:04,075 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571519492] [2019-10-13 19:17:04,075 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:04,075 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:04,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:04,090 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:04,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289051651] [2019-10-13 19:17:04,091 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 19:17:04,231 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 19:17:04,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:04,232 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-10-13 19:17:04,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:04,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:04,617 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 19:17:04,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571519492] [2019-10-13 19:17:04,618 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:04,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289051651] [2019-10-13 19:17:04,618 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:04,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-13 19:17:04,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231984097] [2019-10-13 19:17:04,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 19:17:04,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:04,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 19:17:04,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:17:04,620 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-10-13 19:17:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:05,002 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-13 19:17:05,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 19:17:05,003 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-13 19:17:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:05,004 INFO L225 Difference]: With dead ends: 36 [2019-10-13 19:17:05,004 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 19:17:05,005 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 19:17:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 19:17:05,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-13 19:17:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:17:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-13 19:17:05,011 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-10-13 19:17:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:05,011 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-13 19:17:05,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 19:17:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-13 19:17:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:17:05,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:05,012 INFO L380 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:05,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:05,221 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash -363089018, now seen corresponding path program 16 times [2019-10-13 19:17:05,222 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:05,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783952520] [2019-10-13 19:17:05,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:05,223 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:05,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:05,233 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:05,233 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400416403] [2019-10-13 19:17:05,233 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 19:17:05,407 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:05,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:05,409 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-13 19:17:05,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:05,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:05,791 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 19:17:05,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783952520] [2019-10-13 19:17:05,791 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:05,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400416403] [2019-10-13 19:17:05,792 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:05,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-13 19:17:05,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665753544] [2019-10-13 19:17:05,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 19:17:05,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 19:17:05,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-13 19:17:05,793 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-10-13 19:17:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:06,272 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-10-13 19:17:06,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 19:17:06,273 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-10-13 19:17:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:06,274 INFO L225 Difference]: With dead ends: 37 [2019-10-13 19:17:06,274 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 19:17:06,275 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 19:17:06,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 19:17:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-13 19:17:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 19:17:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-13 19:17:06,282 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-10-13 19:17:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:06,283 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-13 19:17:06,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 19:17:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-13 19:17:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 19:17:06,284 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:06,284 INFO L380 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:06,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:06,487 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:06,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1629079872, now seen corresponding path program 17 times [2019-10-13 19:17:06,489 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:06,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489496508] [2019-10-13 19:17:06,490 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:06,490 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:06,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:06,512 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:06,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578159415] [2019-10-13 19:17:06,512 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 19:17:06,572 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-13 19:17:06,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:06,574 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-10-13 19:17:06,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:06,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:06,957 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 19:17:06,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489496508] [2019-10-13 19:17:06,958 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:06,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578159415] [2019-10-13 19:17:06,958 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:06,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-13 19:17:06,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177901560] [2019-10-13 19:17:06,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 19:17:06,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:06,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 19:17:06,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-10-13 19:17:06,960 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-10-13 19:17:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:07,421 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-10-13 19:17:07,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 19:17:07,422 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-10-13 19:17:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:07,423 INFO L225 Difference]: With dead ends: 38 [2019-10-13 19:17:07,423 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 19:17:07,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:17:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 19:17:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-13 19:17:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 19:17:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-13 19:17:07,429 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-10-13 19:17:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:07,429 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-13 19:17:07,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 19:17:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-13 19:17:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 19:17:07,430 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:07,430 INFO L380 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:07,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:07,631 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:07,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1038193978, now seen corresponding path program 18 times [2019-10-13 19:17:07,632 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:07,632 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452318175] [2019-10-13 19:17:07,632 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:07,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:07,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:07,642 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:07,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759819364] [2019-10-13 19:17:07,642 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 19:17:07,754 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-13 19:17:07,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:07,756 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-10-13 19:17:07,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:08,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:08,188 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 19:17:08,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452318175] [2019-10-13 19:17:08,188 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:08,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759819364] [2019-10-13 19:17:08,189 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:08,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-13 19:17:08,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291384307] [2019-10-13 19:17:08,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 19:17:08,189 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:08,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 19:17:08,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:17:08,190 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-10-13 19:17:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:08,688 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-13 19:17:08,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 19:17:08,689 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-10-13 19:17:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:08,689 INFO L225 Difference]: With dead ends: 39 [2019-10-13 19:17:08,689 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 19:17:08,690 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 19:17:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 19:17:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-13 19:17:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 19:17:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-13 19:17:08,695 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-10-13 19:17:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:08,695 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-13 19:17:08,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 19:17:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-13 19:17:08,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 19:17:08,696 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:08,696 INFO L380 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:08,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:08,901 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:08,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2119304704, now seen corresponding path program 19 times [2019-10-13 19:17:08,902 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:08,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102766446] [2019-10-13 19:17:08,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:08,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:08,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:08,911 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:08,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326567952] [2019-10-13 19:17:08,912 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 19:17:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:08,989 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-13 19:17:08,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:09,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:09,463 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 19:17:09,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102766446] [2019-10-13 19:17:09,463 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:09,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326567952] [2019-10-13 19:17:09,464 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:09,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-13 19:17:09,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143709551] [2019-10-13 19:17:09,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 19:17:09,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 19:17:09,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:17:09,465 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-10-13 19:17:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:10,001 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-10-13 19:17:10,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 19:17:10,002 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-10-13 19:17:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:10,002 INFO L225 Difference]: With dead ends: 40 [2019-10-13 19:17:10,003 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 19:17:10,003 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 19:17:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 19:17:10,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-13 19:17:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 19:17:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-10-13 19:17:10,009 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-10-13 19:17:10,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:10,009 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-10-13 19:17:10,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 19:17:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-10-13 19:17:10,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 19:17:10,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:10,010 INFO L380 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:10,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:10,213 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1273998842, now seen corresponding path program 20 times [2019-10-13 19:17:10,213 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:10,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689881830] [2019-10-13 19:17:10,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:10,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:10,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:10,230 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:10,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759741550] [2019-10-13 19:17:10,231 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 19:17:10,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:10,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:10,310 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-13 19:17:10,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:10,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:10,752 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 19:17:10,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689881830] [2019-10-13 19:17:10,753 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:10,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759741550] [2019-10-13 19:17:10,753 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:10,753 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-13 19:17:10,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650873798] [2019-10-13 19:17:10,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-13 19:17:10,754 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:10,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-13 19:17:10,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-10-13 19:17:10,755 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-10-13 19:17:11,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:11,343 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-10-13 19:17:11,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 19:17:11,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-10-13 19:17:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:11,344 INFO L225 Difference]: With dead ends: 41 [2019-10-13 19:17:11,344 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 19:17:11,345 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 19:17:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 19:17:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-13 19:17:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 19:17:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-13 19:17:11,349 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-10-13 19:17:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:11,349 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-13 19:17:11,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-13 19:17:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-13 19:17:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 19:17:11,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:11,350 INFO L380 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:11,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:11,554 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:11,555 INFO L82 PathProgramCache]: Analyzing trace with hash -839320896, now seen corresponding path program 21 times [2019-10-13 19:17:11,555 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:11,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534628799] [2019-10-13 19:17:11,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:11,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:11,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:11,565 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:11,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849821509] [2019-10-13 19:17:11,565 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 19:17:11,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-13 19:17:11,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:11,863 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-13 19:17:11,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:12,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:12,345 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 19:17:12,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534628799] [2019-10-13 19:17:12,345 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:12,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849821509] [2019-10-13 19:17:12,346 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:12,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-13 19:17:12,346 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715161076] [2019-10-13 19:17:12,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 19:17:12,347 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:12,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 19:17:12,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-10-13 19:17:12,347 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-10-13 19:17:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:12,960 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-13 19:17:12,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 19:17:12,962 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-10-13 19:17:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:12,963 INFO L225 Difference]: With dead ends: 42 [2019-10-13 19:17:12,964 INFO L226 Difference]: Without dead ends: 39 [2019-10-13 19:17:12,964 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-10-13 19:17:12,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-13 19:17:12,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-13 19:17:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 19:17:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-10-13 19:17:12,968 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-10-13 19:17:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:12,969 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-10-13 19:17:12,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 19:17:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-10-13 19:17:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 19:17:12,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:12,970 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:13,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:13,173 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:13,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:13,174 INFO L82 PathProgramCache]: Analyzing trace with hash -249206458, now seen corresponding path program 22 times [2019-10-13 19:17:13,174 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:13,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826415295] [2019-10-13 19:17:13,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:13,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:13,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:13,183 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:13,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611197564] [2019-10-13 19:17:13,183 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 19:17:13,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:13,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:13,420 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-10-13 19:17:13,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:13,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:13,938 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 19:17:13,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826415295] [2019-10-13 19:17:13,938 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:13,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611197564] [2019-10-13 19:17:13,938 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:13,938 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-13 19:17:13,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214853896] [2019-10-13 19:17:13,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 19:17:13,939 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 19:17:13,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-10-13 19:17:13,940 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-10-13 19:17:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:14,563 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-13 19:17:14,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 19:17:14,563 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-10-13 19:17:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:14,564 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:17:14,564 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 19:17:14,565 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 19:17:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 19:17:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-13 19:17:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 19:17:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-13 19:17:14,575 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-10-13 19:17:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:14,575 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-13 19:17:14,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 19:17:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-13 19:17:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 19:17:14,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:14,576 INFO L380 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:14,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:14,780 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:14,780 INFO L82 PathProgramCache]: Analyzing trace with hash 864471936, now seen corresponding path program 23 times [2019-10-13 19:17:14,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:14,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824449686] [2019-10-13 19:17:14,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:14,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:14,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:14,790 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:14,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846794866] [2019-10-13 19:17:14,790 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 19:17:14,869 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-13 19:17:14,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:14,872 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-10-13 19:17:14,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:15,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:15,443 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 19:17:15,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824449686] [2019-10-13 19:17:15,443 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:15,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846794866] [2019-10-13 19:17:15,444 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:15,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-13 19:17:15,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125996330] [2019-10-13 19:17:15,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 19:17:15,445 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:15,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 19:17:15,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-10-13 19:17:15,445 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-10-13 19:17:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:16,116 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-10-13 19:17:16,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 19:17:16,116 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-10-13 19:17:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:16,117 INFO L225 Difference]: With dead ends: 44 [2019-10-13 19:17:16,117 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 19:17:16,118 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 19:17:16,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 19:17:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-13 19:17:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 19:17:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-10-13 19:17:16,124 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-10-13 19:17:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:16,124 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-10-13 19:17:16,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 19:17:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-10-13 19:17:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 19:17:16,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:16,125 INFO L380 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:16,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:16,331 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:16,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1028763782, now seen corresponding path program 24 times [2019-10-13 19:17:16,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:16,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085614092] [2019-10-13 19:17:16,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:16,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:16,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:16,341 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:16,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317994716] [2019-10-13 19:17:16,341 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 19:17:16,468 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 19:17:16,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:16,470 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-10-13 19:17:16,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:17,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:17,084 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 19:17:17,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085614092] [2019-10-13 19:17:17,085 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:17,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317994716] [2019-10-13 19:17:17,085 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:17,085 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-10-13 19:17:17,085 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894436772] [2019-10-13 19:17:17,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 19:17:17,086 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:17,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 19:17:17,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 19:17:17,086 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-10-13 19:17:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:17,827 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-10-13 19:17:17,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-13 19:17:17,828 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-10-13 19:17:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:17,829 INFO L225 Difference]: With dead ends: 45 [2019-10-13 19:17:17,829 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 19:17:17,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 19:17:17,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 19:17:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-13 19:17:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 19:17:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-10-13 19:17:17,834 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-10-13 19:17:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:17,834 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-10-13 19:17:17,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 19:17:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-10-13 19:17:17,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:17:17,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:17,835 INFO L380 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:18,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:18,039 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:18,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1826843712, now seen corresponding path program 25 times [2019-10-13 19:17:18,040 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:18,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756440870] [2019-10-13 19:17:18,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:18,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:18,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:18,049 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:18,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949514170] [2019-10-13 19:17:18,050 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 19:17:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:18,133 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-10-13 19:17:18,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:18,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:18,757 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 19:17:18,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756440870] [2019-10-13 19:17:18,757 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:18,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949514170] [2019-10-13 19:17:18,758 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:18,758 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-13 19:17:18,758 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352857568] [2019-10-13 19:17:18,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-13 19:17:18,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:18,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-13 19:17:18,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 19:17:18,759 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-10-13 19:17:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:19,532 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-10-13 19:17:19,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-13 19:17:19,532 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-10-13 19:17:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:19,533 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:17:19,533 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 19:17:19,534 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 19:17:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 19:17:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-13 19:17:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 19:17:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-10-13 19:17:19,540 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-10-13 19:17:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:19,540 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-10-13 19:17:19,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-13 19:17:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-10-13 19:17:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:17:19,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:19,541 INFO L380 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:19,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:19,745 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:19,746 INFO L82 PathProgramCache]: Analyzing trace with hash 797517766, now seen corresponding path program 26 times [2019-10-13 19:17:19,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:19,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411987147] [2019-10-13 19:17:19,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:19,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:19,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:19,756 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:19,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319507574] [2019-10-13 19:17:19,756 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 19:17:19,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:19,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:19,851 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-10-13 19:17:19,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:20,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:20,516 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 19:17:20,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411987147] [2019-10-13 19:17:20,517 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:20,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319507574] [2019-10-13 19:17:20,517 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:20,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-10-13 19:17:20,517 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332969701] [2019-10-13 19:17:20,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 19:17:20,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:20,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 19:17:20,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 19:17:20,519 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-10-13 19:17:21,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:21,309 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-13 19:17:21,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 19:17:21,310 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-13 19:17:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:21,310 INFO L225 Difference]: With dead ends: 47 [2019-10-13 19:17:21,311 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 19:17:21,312 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 19:17:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 19:17:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-13 19:17:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 19:17:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-13 19:17:21,317 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-10-13 19:17:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:21,317 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-13 19:17:21,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 19:17:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-13 19:17:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 19:17:21,317 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:21,317 INFO L380 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:21,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:21,518 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:21,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:21,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1046815488, now seen corresponding path program 27 times [2019-10-13 19:17:21,519 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:21,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543777057] [2019-10-13 19:17:21,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:21,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:21,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:21,528 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:21,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886215965] [2019-10-13 19:17:21,529 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 19:17:22,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-13 19:17:22,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:22,142 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-10-13 19:17:22,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:22,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:22,807 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 19:17:22,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543777057] [2019-10-13 19:17:22,808 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:22,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886215965] [2019-10-13 19:17:22,808 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:22,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-13 19:17:22,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86555169] [2019-10-13 19:17:22,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 19:17:22,809 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:22,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 19:17:22,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 19:17:22,810 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-10-13 19:17:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:23,673 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-13 19:17:23,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 19:17:23,674 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-10-13 19:17:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:23,675 INFO L225 Difference]: With dead ends: 48 [2019-10-13 19:17:23,675 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 19:17:23,676 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 19:17:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 19:17:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-13 19:17:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 19:17:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-10-13 19:17:23,681 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-10-13 19:17:23,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:23,682 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-10-13 19:17:23,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 19:17:23,682 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-10-13 19:17:23,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 19:17:23,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:23,682 INFO L380 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:23,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:23,887 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:23,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:23,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1908395782, now seen corresponding path program 28 times [2019-10-13 19:17:23,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:23,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051701662] [2019-10-13 19:17:23,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:23,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:23,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:23,897 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:23,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623491693] [2019-10-13 19:17:23,897 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 19:17:24,502 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:24,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:24,505 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-10-13 19:17:24,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:25,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:25,259 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 19:17:25,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051701662] [2019-10-13 19:17:25,259 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:25,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623491693] [2019-10-13 19:17:25,260 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:25,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-10-13 19:17:25,260 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798910748] [2019-10-13 19:17:25,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 19:17:25,260 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 19:17:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 19:17:25,261 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-10-13 19:17:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:26,192 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-10-13 19:17:26,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-13 19:17:26,193 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-10-13 19:17:26,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:26,194 INFO L225 Difference]: With dead ends: 49 [2019-10-13 19:17:26,194 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 19:17:26,195 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 19:17:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 19:17:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-13 19:17:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 19:17:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-13 19:17:26,200 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-10-13 19:17:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:26,200 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-13 19:17:26,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 19:17:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-13 19:17:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 19:17:26,201 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:26,201 INFO L380 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:26,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:26,402 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash -969335360, now seen corresponding path program 29 times [2019-10-13 19:17:26,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:26,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688889554] [2019-10-13 19:17:26,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:26,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:26,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:26,413 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:26,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462996651] [2019-10-13 19:17:26,413 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 19:17:26,515 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-13 19:17:26,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:26,521 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-10-13 19:17:26,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:27,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:27,266 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 19:17:27,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688889554] [2019-10-13 19:17:27,266 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:27,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462996651] [2019-10-13 19:17:27,267 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:27,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-10-13 19:17:27,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662841319] [2019-10-13 19:17:27,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-13 19:17:27,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:27,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-13 19:17:27,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 19:17:27,268 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-10-13 19:17:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:28,215 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-10-13 19:17:28,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 19:17:28,215 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-10-13 19:17:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:28,216 INFO L225 Difference]: With dead ends: 50 [2019-10-13 19:17:28,216 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:17:28,217 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 19:17:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:17:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-13 19:17:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 19:17:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-10-13 19:17:28,223 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-10-13 19:17:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:28,223 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-10-13 19:17:28,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-13 19:17:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-10-13 19:17:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:17:28,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:28,224 INFO L380 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:28,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:28,425 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:28,425 INFO L82 PathProgramCache]: Analyzing trace with hash 15312454, now seen corresponding path program 30 times [2019-10-13 19:17:28,426 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:28,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237471215] [2019-10-13 19:17:28,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:28,435 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:28,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022505037] [2019-10-13 19:17:28,436 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 19:17:28,751 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-13 19:17:28,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:28,754 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-10-13 19:17:28,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:29,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:29,538 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 19:17:29,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237471215] [2019-10-13 19:17:29,538 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:29,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022505037] [2019-10-13 19:17:29,539 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:29,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-10-13 19:17:29,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831172544] [2019-10-13 19:17:29,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-13 19:17:29,539 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:29,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-13 19:17:29,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 19:17:29,540 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-10-13 19:17:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:30,541 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-13 19:17:30,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-13 19:17:30,541 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-10-13 19:17:30,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:30,542 INFO L225 Difference]: With dead ends: 51 [2019-10-13 19:17:30,542 INFO L226 Difference]: Without dead ends: 48 [2019-10-13 19:17:30,544 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 19:17:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-13 19:17:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-13 19:17:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 19:17:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-13 19:17:30,549 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-10-13 19:17:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:30,549 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-13 19:17:30,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-13 19:17:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-13 19:17:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 19:17:30,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:30,550 INFO L380 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:30,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:30,753 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash 474623616, now seen corresponding path program 31 times [2019-10-13 19:17:30,754 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:30,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870762716] [2019-10-13 19:17:30,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:30,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:30,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:30,766 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:30,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543948615] [2019-10-13 19:17:30,766 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 19:17:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:30,894 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-10-13 19:17:30,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:31,906 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:31,942 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 19:17:31,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870762716] [2019-10-13 19:17:31,943 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:31,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543948615] [2019-10-13 19:17:31,943 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:31,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-10-13 19:17:31,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595987195] [2019-10-13 19:17:31,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-13 19:17:31,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:31,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-13 19:17:31,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 19:17:31,945 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-10-13 19:17:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:33,013 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-10-13 19:17:33,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 19:17:33,013 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-10-13 19:17:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:33,014 INFO L225 Difference]: With dead ends: 52 [2019-10-13 19:17:33,014 INFO L226 Difference]: Without dead ends: 49 [2019-10-13 19:17:33,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 19:17:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-13 19:17:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-13 19:17:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 19:17:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-13 19:17:33,020 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-10-13 19:17:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:33,020 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-13 19:17:33,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-13 19:17:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-13 19:17:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 19:17:33,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:33,021 INFO L380 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:33,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:33,224 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1828367750, now seen corresponding path program 32 times [2019-10-13 19:17:33,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:33,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341047292] [2019-10-13 19:17:33,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:33,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:33,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:33,234 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:33,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521596559] [2019-10-13 19:17:33,235 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 19:17:33,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:33,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:33,342 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-10-13 19:17:33,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:34,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:34,213 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 19:17:34,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341047292] [2019-10-13 19:17:34,213 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:34,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521596559] [2019-10-13 19:17:34,213 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:34,214 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-10-13 19:17:34,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541817290] [2019-10-13 19:17:34,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-13 19:17:34,214 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:34,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-13 19:17:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 19:17:34,215 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-10-13 19:17:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:35,576 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-10-13 19:17:35,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-13 19:17:35,576 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-10-13 19:17:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:35,577 INFO L225 Difference]: With dead ends: 53 [2019-10-13 19:17:35,577 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 19:17:35,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 19:17:35,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 19:17:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-13 19:17:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 19:17:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-10-13 19:17:35,586 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-10-13 19:17:35,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:35,587 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-10-13 19:17:35,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-13 19:17:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-10-13 19:17:35,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 19:17:35,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:35,588 INFO L380 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:35,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:35,791 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:35,791 INFO L82 PathProgramCache]: Analyzing trace with hash 844762944, now seen corresponding path program 33 times [2019-10-13 19:17:35,791 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:35,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114819434] [2019-10-13 19:17:35,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:35,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:35,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:35,799 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:35,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102581373] [2019-10-13 19:17:35,799 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 19:17:37,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-13 19:17:37,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:37,144 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-10-13 19:17:37,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:37,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:38,030 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 19:17:38,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114819434] [2019-10-13 19:17:38,031 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:38,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102581373] [2019-10-13 19:17:38,031 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:38,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-10-13 19:17:38,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68784513] [2019-10-13 19:17:38,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-13 19:17:38,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:38,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-13 19:17:38,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 19:17:38,032 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states.