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+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 11:20:22,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 11:20:22,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 11:20:22,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 11:20:22,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 11:20:22,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 11:20:22,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 11:20:22,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 11:20:22,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 11:20:22,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 11:20:22,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 11:20:22,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 11:20:22,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 11:20:22,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 11:20:22,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 11:20:22,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 11:20:22,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 11:20:22,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 11:20:22,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 11:20:22,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 11:20:22,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 11:20:22,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 11:20:22,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 11:20:22,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 11:20:22,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 11:20:22,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 11:20:22,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 11:20:22,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 11:20:22,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 11:20:22,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 11:20:22,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 11:20:22,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 11:20:22,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 11:20:22,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 11:20:22,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 11:20:22,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 11:20:22,777 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 [2019-10-02 11:20:22,791 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 11:20:22,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 11:20:22,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 11:20:22,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 11:20:22,793 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 11:20:22,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 11:20:22,793 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 11:20:22,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 11:20:22,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 11:20:22,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 11:20:22,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 11:20:22,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 11:20:22,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 11:20:22,794 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 11:20:22,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 11:20:22,795 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 11:20:22,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 11:20:22,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 11:20:22,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 11:20:22,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 11:20:22,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 11:20:22,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:20:22,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 11:20:22,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 11:20:22,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 11:20:22,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 11:20:22,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 11:20:22,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 11:20:22,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 11:20:22,825 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 11:20:22,836 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 11:20:22,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 11:20:22,841 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 11:20:22,842 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 11:20:22,842 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-10-02 11:20:22,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38f186af/9a991428a3a64b0d9d1b20e79902b008/FLAG63bb93bcb [2019-10-02 11:20:23,331 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 11:20:23,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-10-02 11:20:23,338 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38f186af/9a991428a3a64b0d9d1b20e79902b008/FLAG63bb93bcb [2019-10-02 11:20:23,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38f186af/9a991428a3a64b0d9d1b20e79902b008 [2019-10-02 11:20:23,723 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 11:20:23,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 11:20:23,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 11:20:23,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 11:20:23,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 11:20:23,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:20:23" (1/1) ... [2019-10-02 11:20:23,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35627d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23, skipping insertion in model container [2019-10-02 11:20:23,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:20:23" (1/1) ... [2019-10-02 11:20:23,741 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 11:20:23,759 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 11:20:23,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:20:23,938 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 11:20:23,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:20:23,965 INFO L192 MainTranslator]: Completed translation [2019-10-02 11:20:23,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23 WrapperNode [2019-10-02 11:20:23,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 11:20:23,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 11:20:23,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 11:20:23,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 11:20:24,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23" (1/1) ... [2019-10-02 11:20:24,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23" (1/1) ... [2019-10-02 11:20:24,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23" (1/1) ... [2019-10-02 11:20:24,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23" (1/1) ... [2019-10-02 11:20:24,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23" (1/1) ... [2019-10-02 11:20:24,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23" (1/1) ... [2019-10-02 11:20:24,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23" (1/1) ... [2019-10-02 11:20:24,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 11:20:24,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 11:20:24,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 11:20:24,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 11:20:24,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23" (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 [2019-10-02 11:20:24,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 11:20:24,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 11:20:24,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 11:20:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 11:20:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-02 11:20:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 11:20:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 11:20:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 11:20:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 11:20:24,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 11:20:24,311 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 11:20:24,312 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-02 11:20:24,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:20:24 BoogieIcfgContainer [2019-10-02 11:20:24,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 11:20:24,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 11:20:24,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 11:20:24,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 11:20:24,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 11:20:23" (1/3) ... [2019-10-02 11:20:24,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346b7c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:20:24, skipping insertion in model container [2019-10-02 11:20:24,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:20:23" (2/3) ... [2019-10-02 11:20:24,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346b7c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:20:24, skipping insertion in model container [2019-10-02 11:20:24,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:20:24" (3/3) ... [2019-10-02 11:20:24,323 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-10-02 11:20:24,333 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 11:20:24,353 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 11:20:24,369 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 11:20:24,398 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 11:20:24,399 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 11:20:24,399 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 11:20:24,399 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 11:20:24,400 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 11:20:24,400 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 11:20:24,400 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 11:20:24,400 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 11:20:24,400 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 11:20:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-02 11:20:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-02 11:20:24,421 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:24,422 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:24,423 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:24,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:24,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-10-02 11:20:24,430 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:24,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:24,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:24,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:24,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:24,511 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:24,511 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:24,511 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:24,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:20:24,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-02 11:20:24,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Exception during sending of exit command (exit): Stream closed [2019-10-02 11:20:24,658 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:20:24,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 11:20:24,673 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 11:20:24,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 11:20:24,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 11:20:24,690 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-10-02 11:20:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:24,777 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-02 11:20:24,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 11:20:24,779 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-02 11:20:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:24,788 INFO L225 Difference]: With dead ends: 26 [2019-10-02 11:20:24,788 INFO L226 Difference]: Without dead ends: 13 [2019-10-02 11:20:24,791 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 11:20:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-02 11:20:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-02 11:20:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-02 11:20:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-02 11:20:24,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-02 11:20:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:24,825 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-02 11:20:24,825 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 11:20:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-02 11:20:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-02 11:20:24,826 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:24,826 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:24,826 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:24,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:24,827 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-10-02 11:20:24,827 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:24,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:24,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:24,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:24,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:24,840 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:24,840 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:24,841 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:24,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:20:24,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-02 11:20:24,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:24,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:20:24,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:24,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 11:20:24,973 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:20:24,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:20:24,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:20:24,974 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-10-02 11:20:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:25,053 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-10-02 11:20:25,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 11:20:25,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-02 11:20:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:25,056 INFO L225 Difference]: With dead ends: 17 [2019-10-02 11:20:25,057 INFO L226 Difference]: Without dead ends: 14 [2019-10-02 11:20:25,058 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:20:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-02 11:20:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-02 11:20:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-02 11:20:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-02 11:20:25,067 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-02 11:20:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:25,068 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-02 11:20:25,068 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:20:25,072 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-02 11:20:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-02 11:20:25,073 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:25,074 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:25,074 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:25,075 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-10-02 11:20:25,076 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:25,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:25,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:25,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:25,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:25,107 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:25,108 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:25,108 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 11:20:25,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:20:25,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:20:25,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:25,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-02 11:20:25,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:25,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:25,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:25,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-02 11:20:25,218 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 11:20:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 11:20:25,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-02 11:20:25,219 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-10-02 11:20:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:25,275 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-02 11:20:25,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 11:20:25,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-10-02 11:20:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:25,277 INFO L225 Difference]: With dead ends: 18 [2019-10-02 11:20:25,277 INFO L226 Difference]: Without dead ends: 15 [2019-10-02 11:20:25,277 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:20:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-02 11:20:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-02 11:20:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-02 11:20:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-02 11:20:25,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-02 11:20:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:25,283 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-02 11:20:25,283 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 11:20:25,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-02 11:20:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-02 11:20:25,284 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:25,284 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:25,284 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:25,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-10-02 11:20:25,285 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:25,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:25,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:25,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:25,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:25,298 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:25,298 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:25,298 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:25,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:20:25,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-02 11:20:25,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:25,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-02 11:20:25,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:25,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:25,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:25,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-02 11:20:25,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 11:20:25,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 11:20:25,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-02 11:20:25,431 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-10-02 11:20:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:25,508 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-02 11:20:25,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 11:20:25,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-02 11:20:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:25,509 INFO L225 Difference]: With dead ends: 19 [2019-10-02 11:20:25,510 INFO L226 Difference]: Without dead ends: 16 [2019-10-02 11:20:25,511 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:20:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-02 11:20:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-02 11:20:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-02 11:20:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-02 11:20:25,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-02 11:20:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:25,523 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-02 11:20:25,523 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 11:20:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-02 11:20:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-02 11:20:25,524 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:25,524 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:25,525 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:25,527 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-10-02 11:20:25,527 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:25,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:25,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:25,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:25,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:25,552 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:25,553 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:25,553 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:25,572 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:20:25,646 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:20:25,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:25,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-02 11:20:25,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:25,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:25,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:25,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 11:20:25,734 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 11:20:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 11:20:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-02 11:20:25,735 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-10-02 11:20:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:25,804 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-02 11:20:25,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 11:20:25,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-02 11:20:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:25,805 INFO L225 Difference]: With dead ends: 20 [2019-10-02 11:20:25,805 INFO L226 Difference]: Without dead ends: 17 [2019-10-02 11:20:25,806 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:20:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-02 11:20:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-02 11:20:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-02 11:20:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-02 11:20:25,810 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-10-02 11:20:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:25,811 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-02 11:20:25,811 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 11:20:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-02 11:20:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-02 11:20:25,812 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:25,812 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:25,812 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:25,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-10-02 11:20:25,813 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:25,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:25,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:25,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:25,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:25,823 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:25,824 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:25,824 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:25,855 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:20:25,873 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-02 11:20:25,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:25,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-02 11:20:25,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:25,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:25,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:25,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-02 11:20:25,976 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:20:25,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:20:25,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:20:25,978 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-10-02 11:20:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:26,115 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-02 11:20:26,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:20:26,115 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-02 11:20:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:26,116 INFO L225 Difference]: With dead ends: 21 [2019-10-02 11:20:26,116 INFO L226 Difference]: Without dead ends: 18 [2019-10-02 11:20:26,117 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:20:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-02 11:20:26,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-02 11:20:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-02 11:20:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-02 11:20:26,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-02 11:20:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:26,121 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-02 11:20:26,121 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:20:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-02 11:20:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-02 11:20:26,122 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:26,122 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:26,123 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:26,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-10-02 11:20:26,123 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:26,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:26,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:26,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:26,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:26,148 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:26,149 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:26,149 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:26,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:20:26,186 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-02 11:20:26,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:26,187 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-02 11:20:26,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:26,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:26,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:26,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 11:20:26,309 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:20:26,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:20:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:20:26,310 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-10-02 11:20:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:26,410 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-02 11:20:26,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 11:20:26,410 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-10-02 11:20:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:26,411 INFO L225 Difference]: With dead ends: 22 [2019-10-02 11:20:26,411 INFO L226 Difference]: Without dead ends: 19 [2019-10-02 11:20:26,412 INFO L640 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 [2019-10-02 11:20:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-02 11:20:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-02 11:20:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-02 11:20:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-02 11:20:26,418 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-02 11:20:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:26,418 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-02 11:20:26,418 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:20:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-02 11:20:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-02 11:20:26,419 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:26,420 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:26,420 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-10-02 11:20:26,421 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:26,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:26,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:26,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:26,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:26,442 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:26,442 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:26,442 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 11:20:26,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:20:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:20:26,486 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-02 11:20:26,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:26,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:26,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:26,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 11:20:26,620 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:20:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:20:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:20:26,621 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-10-02 11:20:26,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:26,719 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-02 11:20:26,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 11:20:26,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-10-02 11:20:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:26,720 INFO L225 Difference]: With dead ends: 23 [2019-10-02 11:20:26,720 INFO L226 Difference]: Without dead ends: 20 [2019-10-02 11:20:26,721 INFO L640 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 [2019-10-02 11:20:26,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-02 11:20:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-02 11:20:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-02 11:20:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-02 11:20:26,726 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-10-02 11:20:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:26,726 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-02 11:20:26,726 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:20:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-02 11:20:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-02 11:20:26,727 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:26,728 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:26,728 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:26,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-10-02 11:20:26,728 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:26,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:26,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:26,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:26,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:26,741 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:26,741 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:26,742 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:26,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:20:26,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:20:26,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:26,801 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-02 11:20:26,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:26,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:26,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:26,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 11:20:26,953 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 11:20:26,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 11:20:26,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:20:26,954 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-10-02 11:20:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:27,099 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-02 11:20:27,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 11:20:27,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-10-02 11:20:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:27,101 INFO L225 Difference]: With dead ends: 24 [2019-10-02 11:20:27,101 INFO L226 Difference]: Without dead ends: 21 [2019-10-02 11:20:27,101 INFO L640 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 [2019-10-02 11:20:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-02 11:20:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-02 11:20:27,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-02 11:20:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-02 11:20:27,106 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-10-02 11:20:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:27,106 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-02 11:20:27,106 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 11:20:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-02 11:20:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-02 11:20:27,107 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:27,107 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:27,107 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:27,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-10-02 11:20:27,108 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:27,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:27,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:27,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:27,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:27,118 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:27,118 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:27,119 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 11:20:27,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:20:27,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-02 11:20:27,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:27,170 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-02 11:20:27,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:27,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:27,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:27,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-02 11:20:27,324 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 11:20:27,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 11:20:27,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:20:27,325 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-10-02 11:20:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:27,462 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-02 11:20:27,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 11:20:27,462 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-10-02 11:20:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:27,463 INFO L225 Difference]: With dead ends: 25 [2019-10-02 11:20:27,463 INFO L226 Difference]: Without dead ends: 22 [2019-10-02 11:20:27,463 INFO L640 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 [2019-10-02 11:20:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-02 11:20:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-02 11:20:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-02 11:20:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-02 11:20:27,468 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-10-02 11:20:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:27,468 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-02 11:20:27,468 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 11:20:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-02 11:20:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-02 11:20:27,469 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:27,469 INFO L411 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:27,469 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:27,470 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-10-02 11:20:27,470 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:27,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:27,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:27,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:27,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:27,480 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:27,480 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:27,480 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 11:20:27,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:20:27,577 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:20:27,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:27,579 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-02 11:20:27,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:27,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:27,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:27,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-02 11:20:27,742 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 11:20:27,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 11:20:27,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-02 11:20:27,743 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-10-02 11:20:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:27,903 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-02 11:20:27,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 11:20:27,904 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-10-02 11:20:27,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:27,905 INFO L225 Difference]: With dead ends: 26 [2019-10-02 11:20:27,906 INFO L226 Difference]: Without dead ends: 23 [2019-10-02 11:20:27,907 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-02 11:20:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-02 11:20:27,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-02 11:20:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-02 11:20:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-02 11:20:27,912 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-10-02 11:20:27,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:27,912 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-02 11:20:27,913 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-02 11:20:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-02 11:20:27,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-02 11:20:27,913 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:27,914 INFO L411 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:27,914 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:27,914 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-10-02 11:20:27,914 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:27,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:27,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:27,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:27,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:27,926 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:27,926 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:27,926 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:27,953 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:20:27,975 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-02 11:20:27,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:27,977 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-02 11:20:27,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:28,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:28,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:28,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-02 11:20:28,166 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 11:20:28,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 11:20:28,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-02 11:20:28,167 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-10-02 11:20:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:28,389 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-02 11:20:28,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 11:20:28,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-10-02 11:20:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:28,390 INFO L225 Difference]: With dead ends: 27 [2019-10-02 11:20:28,390 INFO L226 Difference]: Without dead ends: 24 [2019-10-02 11:20:28,391 INFO L640 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 [2019-10-02 11:20:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-02 11:20:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-02 11:20:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-02 11:20:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-02 11:20:28,396 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-10-02 11:20:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:28,396 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-02 11:20:28,396 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-02 11:20:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-02 11:20:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-02 11:20:28,397 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:28,397 INFO L411 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:28,398 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-10-02 11:20:28,398 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:28,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:28,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:28,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:28,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:28,409 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:28,409 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:28,409 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:28,433 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:20:28,467 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-02 11:20:28,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:28,469 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-02 11:20:28,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:28,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:28,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:28,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-02 11:20:28,726 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-02 11:20:28,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-02 11:20:28,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-10-02 11:20:28,727 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-10-02 11:20:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:28,940 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-02 11:20:28,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-02 11:20:28,940 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-10-02 11:20:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:28,941 INFO L225 Difference]: With dead ends: 28 [2019-10-02 11:20:28,941 INFO L226 Difference]: Without dead ends: 25 [2019-10-02 11:20:28,942 INFO L640 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 [2019-10-02 11:20:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-02 11:20:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-02 11:20:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-02 11:20:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-02 11:20:28,947 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-10-02 11:20:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:28,948 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-02 11:20:28,948 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-02 11:20:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-02 11:20:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-02 11:20:28,949 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:28,949 INFO L411 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:28,949 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:28,950 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-10-02 11:20:28,950 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:28,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:28,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:28,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:28,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:28,961 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:28,961 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:28,961 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 11:20:28,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:20:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:20:29,022 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-02 11:20:29,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:29,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:29,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:29,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-02 11:20:29,320 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-02 11:20:29,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-02 11:20:29,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-10-02 11:20:29,321 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-10-02 11:20:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:29,518 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-02 11:20:29,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 11:20:29,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-02 11:20:29,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:29,521 INFO L225 Difference]: With dead ends: 29 [2019-10-02 11:20:29,521 INFO L226 Difference]: Without dead ends: 26 [2019-10-02 11:20:29,522 INFO L640 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 [2019-10-02 11:20:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-02 11:20:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-02 11:20:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-02 11:20:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-02 11:20:29,530 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-10-02 11:20:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:29,531 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-02 11:20:29,531 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-02 11:20:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-02 11:20:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-02 11:20:29,532 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:29,532 INFO L411 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:29,532 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:29,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-10-02 11:20:29,534 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:29,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:29,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:29,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:29,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:29,556 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:29,557 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:29,557 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:29,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:20:29,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:20:29,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:29,618 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-02 11:20:29,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:29,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:29,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:29,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-02 11:20:29,868 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-02 11:20:29,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-02 11:20:29,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-10-02 11:20:29,868 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-10-02 11:20:30,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:30,098 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-02 11:20:30,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-02 11:20:30,099 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-10-02 11:20:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:30,099 INFO L225 Difference]: With dead ends: 30 [2019-10-02 11:20:30,100 INFO L226 Difference]: Without dead ends: 27 [2019-10-02 11:20:30,100 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-10-02 11:20:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-02 11:20:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-02 11:20:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-02 11:20:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-02 11:20:30,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-10-02 11:20:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:30,105 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-02 11:20:30,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-02 11:20:30,105 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-02 11:20:30,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-02 11:20:30,106 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:30,106 INFO L411 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:30,107 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:30,107 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-10-02 11:20:30,107 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:30,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:30,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:30,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:30,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:30,118 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:30,118 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:30,118 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:30,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:20:30,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-02 11:20:30,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:30,220 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-02 11:20:30,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:30,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:30,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:30,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-02 11:20:30,465 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-02 11:20:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-02 11:20:30,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-02 11:20:30,466 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-10-02 11:20:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:30,783 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-02 11:20:30,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-02 11:20:30,784 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-10-02 11:20:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:30,785 INFO L225 Difference]: With dead ends: 31 [2019-10-02 11:20:30,785 INFO L226 Difference]: Without dead ends: 28 [2019-10-02 11:20:30,786 INFO L640 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 [2019-10-02 11:20:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-02 11:20:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-02 11:20:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-02 11:20:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-02 11:20:30,791 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-10-02 11:20:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:30,791 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-02 11:20:30,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-02 11:20:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-02 11:20:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-02 11:20:30,792 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:30,792 INFO L411 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:30,793 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:30,796 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-10-02 11:20:30,796 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:30,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:30,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:30,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:30,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:30,813 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:30,813 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:30,813 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-10-02 11:20:30,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:20:30,980 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:20:30,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:30,982 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-02 11:20:30,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:31,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:31,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:31,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-02 11:20:31,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-02 11:20:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-02 11:20:31,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-02 11:20:31,268 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-10-02 11:20:31,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:31,554 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-02 11:20:31,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-02 11:20:31,555 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-10-02 11:20:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:31,556 INFO L225 Difference]: With dead ends: 32 [2019-10-02 11:20:31,556 INFO L226 Difference]: Without dead ends: 29 [2019-10-02 11:20:31,557 INFO L640 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 [2019-10-02 11:20:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-02 11:20:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-02 11:20:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-02 11:20:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-02 11:20:31,562 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-10-02 11:20:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:31,562 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-02 11:20:31,563 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-02 11:20:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-02 11:20:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-02 11:20:31,563 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:31,563 INFO L411 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:31,564 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:31,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-10-02 11:20:31,564 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:31,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:31,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:31,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:31,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:31,573 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:31,573 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:31,573 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:31,604 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:20:31,638 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-02 11:20:31,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:31,641 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-10-02 11:20:31,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:31,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:31,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:31,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-02 11:20:31,916 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-02 11:20:31,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-02 11:20:31,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-10-02 11:20:31,917 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-10-02 11:20:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:32,243 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-02 11:20:32,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-02 11:20:32,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-10-02 11:20:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:32,244 INFO L225 Difference]: With dead ends: 33 [2019-10-02 11:20:32,244 INFO L226 Difference]: Without dead ends: 30 [2019-10-02 11:20:32,245 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-10-02 11:20:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-02 11:20:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-02 11:20:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-02 11:20:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-02 11:20:32,250 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-10-02 11:20:32,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:32,250 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-02 11:20:32,251 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-02 11:20:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-02 11:20:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-02 11:20:32,251 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:32,251 INFO L411 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:32,252 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:32,252 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-10-02 11:20:32,252 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:32,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:32,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:32,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:32,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:32,262 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:32,262 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:32,263 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:32,288 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:20:32,323 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-02 11:20:32,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:32,325 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-02 11:20:32,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:32,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:32,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:32,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-02 11:20:32,642 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-02 11:20:32,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-02 11:20:32,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-10-02 11:20:32,643 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-10-02 11:20:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:33,028 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-02 11:20:33,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-02 11:20:33,028 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-10-02 11:20:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:33,029 INFO L225 Difference]: With dead ends: 34 [2019-10-02 11:20:33,029 INFO L226 Difference]: Without dead ends: 31 [2019-10-02 11:20:33,029 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-10-02 11:20:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-02 11:20:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-02 11:20:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-02 11:20:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-02 11:20:33,034 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-10-02 11:20:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:33,034 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-02 11:20:33,034 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-02 11:20:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-02 11:20:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-02 11:20:33,035 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:33,035 INFO L411 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:33,036 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:33,036 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-10-02 11:20:33,036 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:33,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:33,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:33,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:33,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:33,045 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:33,046 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:33,046 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:33,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:20:33,103 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-02 11:20:33,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:33,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:33,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:33,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-02 11:20:33,462 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-02 11:20:33,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-02 11:20:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-10-02 11:20:33,463 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-10-02 11:20:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:33,845 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-02 11:20:33,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-02 11:20:33,846 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-02 11:20:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:33,847 INFO L225 Difference]: With dead ends: 35 [2019-10-02 11:20:33,847 INFO L226 Difference]: Without dead ends: 32 [2019-10-02 11:20:33,848 INFO L640 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 [2019-10-02 11:20:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-02 11:20:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-02 11:20:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-02 11:20:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-02 11:20:33,853 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-10-02 11:20:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:33,854 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-02 11:20:33,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-02 11:20:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-02 11:20:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-02 11:20:33,855 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:33,855 INFO L411 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:33,855 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:33,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:33,855 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-10-02 11:20:33,856 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:33,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:33,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:33,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:33,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:33,866 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:33,866 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:33,867 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:33,911 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:20:33,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:20:33,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:33,943 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-10-02 11:20:33,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:34,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:34,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:34,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-02 11:20:34,300 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-02 11:20:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-02 11:20:34,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-10-02 11:20:34,301 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-10-02 11:20:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:34,729 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-02 11:20:34,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-02 11:20:34,729 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-02 11:20:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:34,730 INFO L225 Difference]: With dead ends: 36 [2019-10-02 11:20:34,730 INFO L226 Difference]: Without dead ends: 33 [2019-10-02 11:20:34,731 INFO L640 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 [2019-10-02 11:20:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-02 11:20:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-02 11:20:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-02 11:20:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-02 11:20:34,737 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-10-02 11:20:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:34,738 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-02 11:20:34,738 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-02 11:20:34,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-02 11:20:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-02 11:20:34,738 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:34,738 INFO L411 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:34,739 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:34,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:34,739 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-10-02 11:20:34,739 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:34,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:34,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:34,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:34,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:34,748 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:34,749 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:34,749 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:34,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:20:34,917 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-02 11:20:34,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:34,919 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-02 11:20:34,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:35,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:35,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:35,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-02 11:20:35,290 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-02 11:20:35,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-02 11:20:35,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-02 11:20:35,291 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-10-02 11:20:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:35,733 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-10-02 11:20:35,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-02 11:20:35,736 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-10-02 11:20:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:35,737 INFO L225 Difference]: With dead ends: 37 [2019-10-02 11:20:35,737 INFO L226 Difference]: Without dead ends: 34 [2019-10-02 11:20:35,737 INFO L640 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 [2019-10-02 11:20:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-02 11:20:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-02 11:20:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-02 11:20:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-02 11:20:35,743 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-10-02 11:20:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:35,743 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-02 11:20:35,743 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-02 11:20:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-02 11:20:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-02 11:20:35,744 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:35,744 INFO L411 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:35,744 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-10-02 11:20:35,745 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:35,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:35,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:35,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:35,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:35,753 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:35,753 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:35,753 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:35,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:20:35,939 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:20:35,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:35,941 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-10-02 11:20:35,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:36,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:36,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:36,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-02 11:20:36,340 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-02 11:20:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-02 11:20:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-10-02 11:20:36,340 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-10-02 11:20:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:36,836 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-10-02 11:20:36,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-02 11:20:36,837 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-10-02 11:20:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:36,838 INFO L225 Difference]: With dead ends: 38 [2019-10-02 11:20:36,838 INFO L226 Difference]: Without dead ends: 35 [2019-10-02 11:20:36,839 INFO L640 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 [2019-10-02 11:20:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-02 11:20:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-02 11:20:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-02 11:20:36,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-02 11:20:36,844 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-10-02 11:20:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:36,845 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-02 11:20:36,845 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-02 11:20:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-02 11:20:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-02 11:20:36,845 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:36,846 INFO L411 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:36,846 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:36,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-10-02 11:20:36,846 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:36,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:36,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:36,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:36,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:36,856 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:36,856 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:36,857 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:36,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:20:36,956 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-02 11:20:36,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:36,959 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-10-02 11:20:36,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:37,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:37,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:37,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-02 11:20:37,551 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-02 11:20:37,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-02 11:20:37,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-10-02 11:20:37,552 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-10-02 11:20:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:38,057 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-02 11:20:38,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-02 11:20:38,063 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-10-02 11:20:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:38,064 INFO L225 Difference]: With dead ends: 39 [2019-10-02 11:20:38,064 INFO L226 Difference]: Without dead ends: 36 [2019-10-02 11:20:38,065 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-10-02 11:20:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-02 11:20:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-02 11:20:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-02 11:20:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-02 11:20:38,069 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-10-02 11:20:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:38,070 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-02 11:20:38,070 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-02 11:20:38,070 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-02 11:20:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-02 11:20:38,071 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:38,071 INFO L411 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:38,071 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-10-02 11:20:38,071 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:38,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:38,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:38,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:38,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:38,080 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:38,080 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:38,081 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:38,113 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:20:38,178 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-02 11:20:38,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:38,180 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-02 11:20:38,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:38,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:20:38,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:38,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-02 11:20:38,621 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-02 11:20:38,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-02 11:20:38,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-10-02 11:20:38,622 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-10-02 11:20:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:39,125 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-10-02 11:20:39,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-02 11:20:39,125 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-10-02 11:20:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:39,126 INFO L225 Difference]: With dead ends: 40 [2019-10-02 11:20:39,126 INFO L226 Difference]: Without dead ends: 37 [2019-10-02 11:20:39,127 INFO L640 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 [2019-10-02 11:20:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-02 11:20:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-02 11:20:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-02 11:20:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-10-02 11:20:39,132 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-10-02 11:20:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:39,132 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-10-02 11:20:39,132 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-02 11:20:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-10-02 11:20:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-02 11:20:39,133 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:39,133 INFO L411 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:39,133 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-10-02 11:20:39,133 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:39,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:39,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:39,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:39,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:39,141 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:39,141 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:39,142 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:39,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:20:39,215 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-02 11:20:39,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:39,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:39,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:39,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-02 11:20:39,729 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-02 11:20:39,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-02 11:20:39,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-10-02 11:20:39,730 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-10-02 11:20:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:40,305 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-10-02 11:20:40,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-02 11:20:40,305 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-10-02 11:20:40,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:40,306 INFO L225 Difference]: With dead ends: 41 [2019-10-02 11:20:40,306 INFO L226 Difference]: Without dead ends: 38 [2019-10-02 11:20:40,307 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-10-02 11:20:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-02 11:20:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-02 11:20:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-02 11:20:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-02 11:20:40,313 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-10-02 11:20:40,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:40,313 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-02 11:20:40,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-02 11:20:40,313 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-02 11:20:40,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 11:20:40,314 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:40,314 INFO L411 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:40,314 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:40,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-10-02 11:20:40,314 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:40,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:40,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:40,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:40,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:40,323 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:40,323 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:40,323 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:40,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:20:40,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:20:40,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:40,433 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-02 11:20:40,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:40,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:40,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:40,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-02 11:20:40,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-02 11:20:40,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-02 11:20:40,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-10-02 11:20:40,919 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-10-02 11:20:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:41,548 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-02 11:20:41,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-02 11:20:41,549 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-10-02 11:20:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:41,550 INFO L225 Difference]: With dead ends: 42 [2019-10-02 11:20:41,550 INFO L226 Difference]: Without dead ends: 39 [2019-10-02 11:20:41,551 INFO L640 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 [2019-10-02 11:20:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-02 11:20:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-02 11:20:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-02 11:20:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-10-02 11:20:41,556 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-10-02 11:20:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:41,557 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-10-02 11:20:41,557 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-02 11:20:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-10-02 11:20:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-02 11:20:41,557 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:41,557 INFO L411 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:41,558 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:41,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:41,558 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-10-02 11:20:41,558 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:41,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:41,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:41,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:41,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:41,566 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:41,567 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:41,567 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:41,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:20:41,917 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-02 11:20:41,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:41,919 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-10-02 11:20:41,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:42,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:42,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:42,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-02 11:20:42,455 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-02 11:20:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-02 11:20:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-10-02 11:20:42,456 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-10-02 11:20:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:43,155 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-02 11:20:43,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-02 11:20:43,156 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-10-02 11:20:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:43,156 INFO L225 Difference]: With dead ends: 43 [2019-10-02 11:20:43,156 INFO L226 Difference]: Without dead ends: 40 [2019-10-02 11:20:43,157 INFO L640 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 [2019-10-02 11:20:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-02 11:20:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-02 11:20:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-02 11:20:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-02 11:20:43,161 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-10-02 11:20:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:43,161 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-02 11:20:43,161 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-02 11:20:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-02 11:20:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-02 11:20:43,162 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:43,162 INFO L411 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:43,162 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:43,163 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-10-02 11:20:43,163 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:43,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:43,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:43,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:43,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:43,171 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:43,171 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:43,171 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:43,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:20:43,420 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:20:43,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:43,423 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-10-02 11:20:43,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:44,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:44,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:44,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-02 11:20:44,077 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-02 11:20:44,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-02 11:20:44,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-10-02 11:20:44,078 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-10-02 11:20:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:44,836 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-10-02 11:20:44,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-02 11:20:44,836 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-10-02 11:20:44,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:44,837 INFO L225 Difference]: With dead ends: 44 [2019-10-02 11:20:44,837 INFO L226 Difference]: Without dead ends: 41 [2019-10-02 11:20:44,838 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-10-02 11:20:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-02 11:20:44,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-02 11:20:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-02 11:20:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-10-02 11:20:44,846 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-10-02 11:20:44,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:44,846 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-10-02 11:20:44,848 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-02 11:20:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-10-02 11:20:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-02 11:20:44,849 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:44,849 INFO L411 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:44,849 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:44,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-10-02 11:20:44,849 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:44,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:44,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:44,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:44,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:44,858 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:44,858 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:44,858 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:44,898 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:20:44,955 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-02 11:20:44,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:44,957 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-10-02 11:20:44,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:45,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:45,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:45,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-10-02 11:20:45,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-02 11:20:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-02 11:20:45,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-10-02 11:20:45,556 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-10-02 11:20:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:46,405 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-10-02 11:20:46,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-02 11:20:46,405 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-10-02 11:20:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:46,406 INFO L225 Difference]: With dead ends: 45 [2019-10-02 11:20:46,406 INFO L226 Difference]: Without dead ends: 42 [2019-10-02 11:20:46,407 INFO L640 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 [2019-10-02 11:20:46,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-02 11:20:46,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-02 11:20:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-02 11:20:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-10-02 11:20:46,412 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-10-02 11:20:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:46,413 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-10-02 11:20:46,413 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-02 11:20:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-10-02 11:20:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-02 11:20:46,413 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:46,413 INFO L411 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:46,414 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:46,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-10-02 11:20:46,414 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:46,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:46,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:46,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:46,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:46,422 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:46,423 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:46,423 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:46,477 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:20:46,607 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-02 11:20:46,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:46,610 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-10-02 11:20:46,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:47,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:47,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:47,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-02 11:20:47,226 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-02 11:20:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-02 11:20:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-10-02 11:20:47,227 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-10-02 11:20:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:48,073 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-10-02 11:20:48,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-02 11:20:48,078 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-10-02 11:20:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:48,079 INFO L225 Difference]: With dead ends: 46 [2019-10-02 11:20:48,079 INFO L226 Difference]: Without dead ends: 43 [2019-10-02 11:20:48,080 INFO L640 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 [2019-10-02 11:20:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-02 11:20:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-02 11:20:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-02 11:20:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-10-02 11:20:48,085 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-10-02 11:20:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:48,085 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-10-02 11:20:48,085 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-02 11:20:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-10-02 11:20:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-02 11:20:48,086 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:48,086 INFO L411 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:48,086 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-10-02 11:20:48,087 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:48,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:48,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:48,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:48,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:48,098 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:48,099 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:48,099 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:48,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:20:48,210 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-10-02 11:20:48,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:48,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:48,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:48,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-10-02 11:20:48,825 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-02 11:20:48,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-02 11:20:48,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-10-02 11:20:48,826 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-10-02 11:20:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:49,671 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-02 11:20:49,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-02 11:20:49,672 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-02 11:20:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:49,673 INFO L225 Difference]: With dead ends: 47 [2019-10-02 11:20:49,673 INFO L226 Difference]: Without dead ends: 44 [2019-10-02 11:20:49,674 INFO L640 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 [2019-10-02 11:20:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-02 11:20:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-02 11:20:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-02 11:20:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-02 11:20:49,679 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-10-02 11:20:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:49,680 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-02 11:20:49,680 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-02 11:20:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-02 11:20:49,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-02 11:20:49,680 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:49,680 INFO L411 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:49,681 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-10-02 11:20:49,681 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:49,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:49,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:49,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:20:49,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:49,689 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:49,690 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:49,690 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:49,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:20:49,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:20:49,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:49,821 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-10-02 11:20:49,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:50,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:50,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:50,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-02 11:20:50,688 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-02 11:20:50,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-02 11:20:50,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-10-02 11:20:50,689 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-10-02 11:20:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:51,582 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-02 11:20:51,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-02 11:20:51,582 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-10-02 11:20:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:51,583 INFO L225 Difference]: With dead ends: 48 [2019-10-02 11:20:51,583 INFO L226 Difference]: Without dead ends: 45 [2019-10-02 11:20:51,584 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-10-02 11:20:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-02 11:20:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-02 11:20:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-02 11:20:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-10-02 11:20:51,589 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-10-02 11:20:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:51,589 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-10-02 11:20:51,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-02 11:20:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-10-02 11:20:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-02 11:20:51,590 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:51,590 INFO L411 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:51,590 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:51,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:51,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-10-02 11:20:51,591 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:51,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:51,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:51,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:51,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:51,599 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:51,600 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:51,600 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-10-02 11:20:51,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:20:52,306 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-02 11:20:52,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:52,309 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-10-02 11:20:52,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:53,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:53,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:53,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-10-02 11:20:53,045 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-02 11:20:53,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-02 11:20:53,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-10-02 11:20:53,046 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-10-02 11:20:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:54,040 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-10-02 11:20:54,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-02 11:20:54,041 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-10-02 11:20:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:54,041 INFO L225 Difference]: With dead ends: 49 [2019-10-02 11:20:54,041 INFO L226 Difference]: Without dead ends: 46 [2019-10-02 11:20:54,042 INFO L640 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 [2019-10-02 11:20:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-02 11:20:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-02 11:20:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-02 11:20:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-02 11:20:54,047 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-10-02 11:20:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:54,048 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-02 11:20:54,048 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-02 11:20:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-02 11:20:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-02 11:20:54,049 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:54,049 INFO L411 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:54,049 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-10-02 11:20:54,049 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:54,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:54,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:54,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:54,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:54,058 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:54,058 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:54,058 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:20:54,099 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:20:54,373 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:20:54,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:54,376 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-10-02 11:20:54,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:55,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:20:55,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:55,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-10-02 11:20:55,115 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-02 11:20:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-02 11:20:55,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-10-02 11:20:55,116 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-10-02 11:20:56,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:56,187 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-10-02 11:20:56,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-02 11:20:56,187 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-10-02 11:20:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:56,188 INFO L225 Difference]: With dead ends: 50 [2019-10-02 11:20:56,188 INFO L226 Difference]: Without dead ends: 47 [2019-10-02 11:20:56,188 INFO L640 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 [2019-10-02 11:20:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-02 11:20:56,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-02 11:20:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-02 11:20:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-10-02 11:20:56,193 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-10-02 11:20:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:56,193 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-10-02 11:20:56,193 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-02 11:20:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-10-02 11:20:56,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-02 11:20:56,194 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:56,194 INFO L411 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:56,194 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-10-02 11:20:56,195 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:56,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:56,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:56,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:56,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:56,203 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:56,203 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:56,203 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:20:56,248 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:20:56,319 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-02 11:20:56,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:56,322 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-10-02 11:20:56,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:57,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:57,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:57,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-10-02 11:20:57,093 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-02 11:20:57,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-02 11:20:57,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-10-02 11:20:57,094 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-10-02 11:20:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:20:58,226 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-02 11:20:58,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-02 11:20:58,226 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-10-02 11:20:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:20:58,227 INFO L225 Difference]: With dead ends: 51 [2019-10-02 11:20:58,227 INFO L226 Difference]: Without dead ends: 48 [2019-10-02 11:20:58,228 INFO L640 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 [2019-10-02 11:20:58,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-02 11:20:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-02 11:20:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-02 11:20:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-02 11:20:58,234 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-10-02 11:20:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:20:58,234 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-02 11:20:58,234 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-02 11:20:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-02 11:20:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-02 11:20:58,235 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:20:58,235 INFO L411 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:20:58,235 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:20:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:20:58,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-10-02 11:20:58,235 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:20:58,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:20:58,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:58,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:20:58,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:20:58,244 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:20:58,244 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:20:58,244 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:20:58,294 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:20:58,493 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-02 11:20:58,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:20:58,496 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-10-02 11:20:58,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:20:59,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:20:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:20:59,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:20:59,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-10-02 11:20:59,311 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-02 11:20:59,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-02 11:20:59,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-10-02 11:20:59,312 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-10-02 11:21:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:00,420 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-10-02 11:21:00,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-02 11:21:00,420 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-10-02 11:21:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:00,421 INFO L225 Difference]: With dead ends: 52 [2019-10-02 11:21:00,421 INFO L226 Difference]: Without dead ends: 49 [2019-10-02 11:21:00,423 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-10-02 11:21:00,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-02 11:21:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-02 11:21:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-02 11:21:00,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-02 11:21:00,429 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-10-02 11:21:00,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:00,429 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-02 11:21:00,429 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-02 11:21:00,429 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-02 11:21:00,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-02 11:21:00,430 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:00,430 INFO L411 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:00,430 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:00,431 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-10-02 11:21:00,431 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:00,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:00,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:00,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:00,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:00,441 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:00,441 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:00,441 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:00,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:21:00,568 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-10-02 11:21:00,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:01,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:01,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:01,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-10-02 11:21:01,561 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-02 11:21:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-02 11:21:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-10-02 11:21:01,561 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-10-02 11:21:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:02,710 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-10-02 11:21:02,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-02 11:21:02,710 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-10-02 11:21:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:02,711 INFO L225 Difference]: With dead ends: 53 [2019-10-02 11:21:02,711 INFO L226 Difference]: Without dead ends: 50 [2019-10-02 11:21:02,712 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-10-02 11:21:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-02 11:21:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-02 11:21:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-02 11:21:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-10-02 11:21:02,717 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-10-02 11:21:02,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:02,717 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-10-02 11:21:02,717 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-02 11:21:02,717 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-10-02 11:21:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-02 11:21:02,718 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:02,718 INFO L411 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:02,718 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:02,718 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-10-02 11:21:02,719 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:02,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:02,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:02,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:02,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:02,727 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:02,727 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:02,727 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:02,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:21:02,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:21:02,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:02,851 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-10-02 11:21:02,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:03,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:03,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:03,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-10-02 11:21:03,744 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-02 11:21:03,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-02 11:21:03,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-10-02 11:21:03,745 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-10-02 11:21:05,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:05,005 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-10-02 11:21:05,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-02 11:21:05,005 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-10-02 11:21:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:05,006 INFO L225 Difference]: With dead ends: 54 [2019-10-02 11:21:05,006 INFO L226 Difference]: Without dead ends: 51 [2019-10-02 11:21:05,007 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-10-02 11:21:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-02 11:21:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-02 11:21:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-02 11:21:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-10-02 11:21:05,013 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-10-02 11:21:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:05,013 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-10-02 11:21:05,013 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-02 11:21:05,013 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-10-02 11:21:05,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-02 11:21:05,013 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:05,013 INFO L411 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:05,014 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:05,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:05,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1609218960, now seen corresponding path program 39 times [2019-10-02 11:21:05,014 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:05,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:05,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:05,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:05,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:05,022 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:05,023 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:05,023 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:05,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:21:06,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-10-02 11:21:06,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:06,627 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-10-02 11:21:06,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:07,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:07,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:07,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-10-02 11:21:07,584 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-02 11:21:07,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-02 11:21:07,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-10-02 11:21:07,585 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-10-02 11:21:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:08,894 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-10-02 11:21:08,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-02 11:21:08,894 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-10-02 11:21:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:08,895 INFO L225 Difference]: With dead ends: 55 [2019-10-02 11:21:08,895 INFO L226 Difference]: Without dead ends: 52 [2019-10-02 11:21:08,896 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-10-02 11:21:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-02 11:21:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-02 11:21:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-02 11:21:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-10-02 11:21:08,901 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-10-02 11:21:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:08,901 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-10-02 11:21:08,902 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-02 11:21:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-10-02 11:21:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-02 11:21:08,902 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:08,902 INFO L411 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:08,902 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1653757319, now seen corresponding path program 40 times [2019-10-02 11:21:08,903 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:08,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:08,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:08,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:08,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:08,912 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:08,912 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:08,912 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:08,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:21:09,322 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:21:09,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:09,325 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-10-02 11:21:09,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:10,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:10,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:10,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-10-02 11:21:10,308 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-02 11:21:10,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-02 11:21:10,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-10-02 11:21:10,310 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-10-02 11:21:11,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:11,654 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-10-02 11:21:11,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-02 11:21:11,655 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-10-02 11:21:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:11,656 INFO L225 Difference]: With dead ends: 56 [2019-10-02 11:21:11,656 INFO L226 Difference]: Without dead ends: 53 [2019-10-02 11:21:11,657 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-10-02 11:21:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-02 11:21:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-02 11:21:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-02 11:21:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-10-02 11:21:11,663 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-10-02 11:21:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:11,663 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-10-02 11:21:11,663 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-02 11:21:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-10-02 11:21:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-02 11:21:11,664 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:11,664 INFO L411 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:11,664 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash -273193136, now seen corresponding path program 41 times [2019-10-02 11:21:11,664 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:11,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:11,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:11,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:11,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:11,672 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:11,672 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:11,673 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:11,762 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:21:11,846 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-10-02 11:21:11,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:11,850 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-10-02 11:21:11,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:12,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:12,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:12,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-10-02 11:21:12,902 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-02 11:21:12,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-02 11:21:12,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-10-02 11:21:12,903 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-10-02 11:21:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:14,309 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-10-02 11:21:14,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-02 11:21:14,309 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-10-02 11:21:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:14,311 INFO L225 Difference]: With dead ends: 57 [2019-10-02 11:21:14,311 INFO L226 Difference]: Without dead ends: 54 [2019-10-02 11:21:14,312 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-10-02 11:21:14,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-02 11:21:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-02 11:21:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-02 11:21:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-10-02 11:21:14,317 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-10-02 11:21:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:14,318 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-10-02 11:21:14,318 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-02 11:21:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-10-02 11:21:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-02 11:21:14,318 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:14,319 INFO L411 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:14,319 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash 120884903, now seen corresponding path program 42 times [2019-10-02 11:21:14,319 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:14,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:14,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:14,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:14,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:14,327 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:14,327 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:14,328 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:14,381 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:21:14,844 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-10-02 11:21:14,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:14,848 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-10-02 11:21:14,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:15,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:15,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:15,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-10-02 11:21:15,888 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-02 11:21:15,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-02 11:21:15,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-10-02 11:21:15,888 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-10-02 11:21:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:17,380 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-10-02 11:21:17,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-02 11:21:17,380 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-10-02 11:21:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:17,381 INFO L225 Difference]: With dead ends: 58 [2019-10-02 11:21:17,381 INFO L226 Difference]: Without dead ends: 55 [2019-10-02 11:21:17,382 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-10-02 11:21:17,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-02 11:21:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-02 11:21:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-02 11:21:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-10-02 11:21:17,388 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-10-02 11:21:17,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:17,389 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-10-02 11:21:17,389 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-02 11:21:17,389 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-10-02 11:21:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-02 11:21:17,389 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:17,389 INFO L411 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:17,390 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:17,390 INFO L82 PathProgramCache]: Analyzing trace with hash -547597776, now seen corresponding path program 43 times [2019-10-02 11:21:17,390 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:17,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:17,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:17,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:17,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:17,397 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:17,398 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:17,398 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:17,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:21:17,542 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-10-02 11:21:17,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:18,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:18,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:18,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-10-02 11:21:18,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-02 11:21:18,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-02 11:21:18,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-10-02 11:21:18,679 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-10-02 11:21:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:20,289 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-10-02 11:21:20,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-02 11:21:20,290 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-10-02 11:21:20,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:20,290 INFO L225 Difference]: With dead ends: 59 [2019-10-02 11:21:20,290 INFO L226 Difference]: Without dead ends: 56 [2019-10-02 11:21:20,291 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-10-02 11:21:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-02 11:21:20,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-02 11:21:20,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-02 11:21:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-10-02 11:21:20,296 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-10-02 11:21:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:20,296 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-10-02 11:21:20,296 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-02 11:21:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-10-02 11:21:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-02 11:21:20,297 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:20,297 INFO L411 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:20,297 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:20,297 INFO L82 PathProgramCache]: Analyzing trace with hash 204275655, now seen corresponding path program 44 times [2019-10-02 11:21:20,297 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:20,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:20,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:20,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:20,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:20,305 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:20,306 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:20,306 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:20,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:21:20,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:21:20,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:20,518 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-10-02 11:21:20,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:21,902 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:21,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:21,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-10-02 11:21:21,953 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-10-02 11:21:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-10-02 11:21:21,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-10-02 11:21:21,954 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-10-02 11:21:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:23,628 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-10-02 11:21:23,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-02 11:21:23,628 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-10-02 11:21:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:23,629 INFO L225 Difference]: With dead ends: 60 [2019-10-02 11:21:23,629 INFO L226 Difference]: Without dead ends: 57 [2019-10-02 11:21:23,630 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-10-02 11:21:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-02 11:21:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-02 11:21:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-02 11:21:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-10-02 11:21:23,635 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-10-02 11:21:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:23,636 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-10-02 11:21:23,636 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-10-02 11:21:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-10-02 11:21:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-02 11:21:23,636 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:23,637 INFO L411 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:23,637 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2037515536, now seen corresponding path program 45 times [2019-10-02 11:21:23,637 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:23,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:23,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:23,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:23,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:23,644 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:23,645 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:23,645 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:23,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:21:26,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-10-02 11:21:26,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:26,075 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-10-02 11:21:26,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:27,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:27,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:27,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-10-02 11:21:27,295 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-02 11:21:27,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-02 11:21:27,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-10-02 11:21:27,296 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-10-02 11:21:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:29,017 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-10-02 11:21:29,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-02 11:21:29,017 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-10-02 11:21:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:29,018 INFO L225 Difference]: With dead ends: 61 [2019-10-02 11:21:29,018 INFO L226 Difference]: Without dead ends: 58 [2019-10-02 11:21:29,018 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-10-02 11:21:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-02 11:21:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-02 11:21:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-02 11:21:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-10-02 11:21:29,024 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-10-02 11:21:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:29,024 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-10-02 11:21:29,024 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-02 11:21:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-10-02 11:21:29,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-02 11:21:29,025 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:29,025 INFO L411 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:29,025 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:29,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1261590297, now seen corresponding path program 46 times [2019-10-02 11:21:29,025 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:29,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:29,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:29,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:29,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:29,032 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:29,032 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:29,032 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:29,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:21:29,531 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:21:29,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:29,534 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-10-02 11:21:29,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:30,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:30,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:30,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-10-02 11:21:30,977 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-02 11:21:30,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-02 11:21:30,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-10-02 11:21:30,977 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-10-02 11:21:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:32,702 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-10-02 11:21:32,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-10-02 11:21:32,703 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-10-02 11:21:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:32,704 INFO L225 Difference]: With dead ends: 62 [2019-10-02 11:21:32,704 INFO L226 Difference]: Without dead ends: 59 [2019-10-02 11:21:32,704 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-10-02 11:21:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-02 11:21:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-10-02 11:21:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-02 11:21:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-10-02 11:21:32,709 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-10-02 11:21:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:32,710 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-10-02 11:21:32,710 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-02 11:21:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-10-02 11:21:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-02 11:21:32,710 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:32,710 INFO L411 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:32,710 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:32,711 INFO L82 PathProgramCache]: Analyzing trace with hash -454656016, now seen corresponding path program 47 times [2019-10-02 11:21:32,711 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:32,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:32,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:32,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:32,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:32,718 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:32,718 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:32,718 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:32,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:21:32,890 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-10-02 11:21:32,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:32,894 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-10-02 11:21:32,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:34,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:34,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:34,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-10-02 11:21:34,195 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-02 11:21:34,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-02 11:21:34,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-10-02 11:21:34,196 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-10-02 11:21:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:36,037 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-10-02 11:21:36,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-10-02 11:21:36,037 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-10-02 11:21:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:36,038 INFO L225 Difference]: With dead ends: 63 [2019-10-02 11:21:36,038 INFO L226 Difference]: Without dead ends: 60 [2019-10-02 11:21:36,039 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-10-02 11:21:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-02 11:21:36,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-10-02 11:21:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-02 11:21:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-10-02 11:21:36,046 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-10-02 11:21:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:36,047 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-10-02 11:21:36,047 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-10-02 11:21:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-10-02 11:21:36,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-02 11:21:36,047 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:36,048 INFO L411 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:36,048 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:36,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1209497081, now seen corresponding path program 48 times [2019-10-02 11:21:36,048 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:36,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:36,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:36,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:36,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:36,057 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:36,057 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:36,057 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:36,128 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:21:36,762 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-02 11:21:36,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:36,765 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-10-02 11:21:36,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:38,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:38,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:38,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-10-02 11:21:38,091 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-10-02 11:21:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-10-02 11:21:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-10-02 11:21:38,092 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-10-02 11:21:39,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:39,962 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-10-02 11:21:39,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-10-02 11:21:39,962 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-10-02 11:21:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:39,963 INFO L225 Difference]: With dead ends: 64 [2019-10-02 11:21:39,964 INFO L226 Difference]: Without dead ends: 61 [2019-10-02 11:21:39,964 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-10-02 11:21:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-02 11:21:39,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-02 11:21:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-02 11:21:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-10-02 11:21:39,972 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-10-02 11:21:39,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:39,972 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-10-02 11:21:39,972 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-10-02 11:21:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-10-02 11:21:39,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-02 11:21:39,973 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:39,973 INFO L411 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:39,973 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:39,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1160233680, now seen corresponding path program 49 times [2019-10-02 11:21:39,974 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:39,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:39,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:39,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:39,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:39,982 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:39,983 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:39,983 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:40,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:21:40,160 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-10-02 11:21:40,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:41,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:41,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:41,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-10-02 11:21:41,543 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-02 11:21:41,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-02 11:21:41,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-10-02 11:21:41,544 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-10-02 11:21:43,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:43,586 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-10-02 11:21:43,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-02 11:21:43,587 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-10-02 11:21:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:43,587 INFO L225 Difference]: With dead ends: 65 [2019-10-02 11:21:43,587 INFO L226 Difference]: Without dead ends: 62 [2019-10-02 11:21:43,588 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-10-02 11:21:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-02 11:21:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-02 11:21:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-02 11:21:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-10-02 11:21:43,594 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-10-02 11:21:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:43,595 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-10-02 11:21:43,595 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-02 11:21:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-10-02 11:21:43,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-02 11:21:43,595 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:43,596 INFO L411 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:43,596 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1607443239, now seen corresponding path program 50 times [2019-10-02 11:21:43,596 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:43,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:43,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:43,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:43,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:43,605 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:43,606 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:43,606 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:43,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:21:43,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:21:43,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:43,808 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-10-02 11:21:43,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:45,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:45,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:45,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-10-02 11:21:45,262 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-02 11:21:45,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-02 11:21:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-10-02 11:21:45,263 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-10-02 11:21:47,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:47,290 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-10-02 11:21:47,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-02 11:21:47,291 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-10-02 11:21:47,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:47,292 INFO L225 Difference]: With dead ends: 66 [2019-10-02 11:21:47,292 INFO L226 Difference]: Without dead ends: 63 [2019-10-02 11:21:47,293 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-10-02 11:21:47,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-02 11:21:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-02 11:21:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-02 11:21:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-10-02 11:21:47,300 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-10-02 11:21:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:47,300 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-10-02 11:21:47,300 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-02 11:21:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-10-02 11:21:47,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-02 11:21:47,301 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:47,301 INFO L411 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:47,301 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:47,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1708929616, now seen corresponding path program 51 times [2019-10-02 11:21:47,302 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:47,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:47,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:47,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:47,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:47,310 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:47,310 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:47,310 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:47,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:21:51,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-10-02 11:21:51,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:51,463 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-10-02 11:21:51,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:52,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:52,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:52,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-10-02 11:21:52,960 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-10-02 11:21:52,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-10-02 11:21:52,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-10-02 11:21:52,961 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-10-02 11:21:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:55,065 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-10-02 11:21:55,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-02 11:21:55,066 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-10-02 11:21:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:55,066 INFO L225 Difference]: With dead ends: 67 [2019-10-02 11:21:55,067 INFO L226 Difference]: Without dead ends: 64 [2019-10-02 11:21:55,067 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-10-02 11:21:55,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-02 11:21:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-02 11:21:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-02 11:21:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-10-02 11:21:55,075 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-10-02 11:21:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:55,075 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-10-02 11:21:55,075 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-10-02 11:21:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-10-02 11:21:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-02 11:21:55,076 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:55,076 INFO L411 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:55,076 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:55,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1437273017, now seen corresponding path program 52 times [2019-10-02 11:21:55,077 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:55,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:55,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:55,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:55,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:55,084 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:55,085 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:55,085 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:55,188 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:21:55,991 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:21:55,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:55,994 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-10-02 11:21:55,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:57,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:57,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:57,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-10-02 11:21:57,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-10-02 11:21:57,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-10-02 11:21:57,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-10-02 11:21:57,501 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-10-02 11:21:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:59,730 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-10-02 11:21:59,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-02 11:21:59,730 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-10-02 11:21:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:59,731 INFO L225 Difference]: With dead ends: 68 [2019-10-02 11:21:59,731 INFO L226 Difference]: Without dead ends: 65 [2019-10-02 11:21:59,731 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-10-02 11:21:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-02 11:21:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-10-02 11:21:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-02 11:21:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-10-02 11:21:59,738 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-10-02 11:21:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:59,739 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-10-02 11:21:59,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-10-02 11:21:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-10-02 11:21:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-02 11:21:59,739 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:59,739 INFO L411 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:59,740 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1605853040, now seen corresponding path program 53 times [2019-10-02 11:21:59,740 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:59,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:59,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:59,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:59,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:59,750 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:59,750 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:59,750 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:59,834 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:21:59,993 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-10-02 11:21:59,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:59,998 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-10-02 11:21:59,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:01,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:01,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:01,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-10-02 11:22:01,563 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-10-02 11:22:01,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-10-02 11:22:01,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-10-02 11:22:01,563 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-10-02 11:22:03,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:03,853 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-10-02 11:22:03,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-02 11:22:03,853 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-10-02 11:22:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:03,854 INFO L225 Difference]: With dead ends: 69 [2019-10-02 11:22:03,854 INFO L226 Difference]: Without dead ends: 66 [2019-10-02 11:22:03,854 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2019-10-02 11:22:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-02 11:22:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-10-02 11:22:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-02 11:22:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-10-02 11:22:03,860 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-10-02 11:22:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:03,861 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-10-02 11:22:03,861 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-10-02 11:22:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-10-02 11:22:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-02 11:22:03,861 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:03,862 INFO L411 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:03,862 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:03,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1758100839, now seen corresponding path program 54 times [2019-10-02 11:22:03,863 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:03,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:03,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:03,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:03,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:03,873 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:03,873 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:03,873 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:03,968 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:22:05,173 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-10-02 11:22:05,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:05,179 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-10-02 11:22:05,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:06,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:06,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:06,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-10-02 11:22:06,830 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-02 11:22:06,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-02 11:22:06,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-10-02 11:22:06,837 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-10-02 11:22:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:09,254 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-10-02 11:22:09,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-02 11:22:09,255 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-10-02 11:22:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:09,255 INFO L225 Difference]: With dead ends: 70 [2019-10-02 11:22:09,255 INFO L226 Difference]: Without dead ends: 67 [2019-10-02 11:22:09,256 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2019-10-02 11:22:09,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-02 11:22:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-10-02 11:22:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-02 11:22:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-10-02 11:22:09,261 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-10-02 11:22:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:09,262 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-10-02 11:22:09,262 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-02 11:22:09,262 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-10-02 11:22:09,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-02 11:22:09,262 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:09,263 INFO L411 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:09,263 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:09,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1333511312, now seen corresponding path program 55 times [2019-10-02 11:22:09,263 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:09,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:09,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:09,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:09,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:09,271 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:09,271 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:09,271 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:09,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:22:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:22:09,476 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-10-02 11:22:09,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:11,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:11,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:11,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-10-02 11:22:11,394 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-02 11:22:11,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-02 11:22:11,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-10-02 11:22:11,395 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-10-02 11:22:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:13,889 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-10-02 11:22:13,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-02 11:22:13,890 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-10-02 11:22:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:13,890 INFO L225 Difference]: With dead ends: 71 [2019-10-02 11:22:13,890 INFO L226 Difference]: Without dead ends: 68 [2019-10-02 11:22:13,891 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-10-02 11:22:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-02 11:22:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-02 11:22:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-02 11:22:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-10-02 11:22:13,897 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-10-02 11:22:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:13,897 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-10-02 11:22:13,897 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-02 11:22:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-10-02 11:22:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-02 11:22:13,898 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:13,898 INFO L411 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:13,898 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:13,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1610759815, now seen corresponding path program 56 times [2019-10-02 11:22:13,898 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:13,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:13,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:13,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:22:13,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:13,905 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:13,905 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:13,906 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:13,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:22:14,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:22:14,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:14,113 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-10-02 11:22:14,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:15,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:15,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:15,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-10-02 11:22:15,887 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-10-02 11:22:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-10-02 11:22:15,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-10-02 11:22:15,888 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-10-02 11:22:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:18,385 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-10-02 11:22:18,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-10-02 11:22:18,386 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-10-02 11:22:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:18,387 INFO L225 Difference]: With dead ends: 72 [2019-10-02 11:22:18,387 INFO L226 Difference]: Without dead ends: 69 [2019-10-02 11:22:18,388 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-10-02 11:22:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-02 11:22:18,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-10-02 11:22:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-02 11:22:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-10-02 11:22:18,394 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-10-02 11:22:18,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:18,394 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-10-02 11:22:18,394 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-10-02 11:22:18,394 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-10-02 11:22:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-02 11:22:18,394 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:18,394 INFO L411 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:18,395 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:18,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1606115760, now seen corresponding path program 57 times [2019-10-02 11:22:18,395 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:18,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:18,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:18,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:18,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:18,404 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:18,404 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:18,404 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:18,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:22:25,564 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-10-02 11:22:25,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:25,570 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-10-02 11:22:25,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:27,340 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:27,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:27,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-10-02 11:22:27,401 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-02 11:22:27,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-02 11:22:27,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-10-02 11:22:27,402 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-10-02 11:22:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:30,009 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-10-02 11:22:30,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-10-02 11:22:30,010 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-10-02 11:22:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:30,011 INFO L225 Difference]: With dead ends: 73 [2019-10-02 11:22:30,011 INFO L226 Difference]: Without dead ends: 70 [2019-10-02 11:22:30,011 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2019-10-02 11:22:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-02 11:22:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-10-02 11:22:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-02 11:22:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-10-02 11:22:30,016 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-10-02 11:22:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:30,017 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-10-02 11:22:30,017 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-02 11:22:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-10-02 11:22:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-02 11:22:30,017 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:30,017 INFO L411 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:30,017 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1749956519, now seen corresponding path program 58 times [2019-10-02 11:22:30,018 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:30,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:30,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:30,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:30,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:30,025 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:30,025 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:30,025 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:30,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:22:30,742 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:22:30,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:30,746 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-10-02 11:22:30,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:32,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:32,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:32,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-10-02 11:22:32,625 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-10-02 11:22:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-10-02 11:22:32,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-10-02 11:22:32,626 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-10-02 11:22:35,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:35,361 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-10-02 11:22:35,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-10-02 11:22:35,361 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-10-02 11:22:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:35,362 INFO L225 Difference]: With dead ends: 74 [2019-10-02 11:22:35,362 INFO L226 Difference]: Without dead ends: 71 [2019-10-02 11:22:35,363 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2019-10-02 11:22:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-02 11:22:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-02 11:22:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-02 11:22:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-10-02 11:22:35,370 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-10-02 11:22:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:35,370 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-10-02 11:22:35,370 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-10-02 11:22:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-10-02 11:22:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-02 11:22:35,371 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:35,371 INFO L411 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:35,371 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:35,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:35,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1585985232, now seen corresponding path program 59 times [2019-10-02 11:22:35,371 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:35,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:35,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:35,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:35,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:35,380 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:35,380 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:35,380 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:35,494 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:22:35,670 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-10-02 11:22:35,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:35,675 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-10-02 11:22:35,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:37,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:37,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:37,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-10-02 11:22:37,567 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-10-02 11:22:37,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-10-02 11:22:37,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-10-02 11:22:37,568 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-10-02 11:22:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:40,352 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-10-02 11:22:40,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-10-02 11:22:40,352 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-10-02 11:22:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:40,353 INFO L225 Difference]: With dead ends: 75 [2019-10-02 11:22:40,354 INFO L226 Difference]: Without dead ends: 72 [2019-10-02 11:22:40,354 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2019-10-02 11:22:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-02 11:22:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-10-02 11:22:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-02 11:22:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-10-02 11:22:40,361 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-10-02 11:22:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:40,361 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-10-02 11:22:40,361 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-10-02 11:22:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-10-02 11:22:40,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-02 11:22:40,361 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:40,362 INFO L411 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:40,362 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:40,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:40,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1920964409, now seen corresponding path program 60 times [2019-10-02 11:22:40,362 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:40,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:40,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:40,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:40,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:40,371 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:40,371 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:40,371 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:40,468 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:22:42,197 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-10-02 11:22:42,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:42,204 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-10-02 11:22:42,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:44,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:44,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:44,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-10-02 11:22:44,182 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-10-02 11:22:44,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-10-02 11:22:44,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-10-02 11:22:44,183 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-10-02 11:22:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:47,058 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-10-02 11:22:47,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-10-02 11:22:47,058 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-10-02 11:22:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:47,059 INFO L225 Difference]: With dead ends: 76 [2019-10-02 11:22:47,059 INFO L226 Difference]: Without dead ends: 73 [2019-10-02 11:22:47,059 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2019-10-02 11:22:47,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-02 11:22:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-10-02 11:22:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-02 11:22:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-10-02 11:22:47,065 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-10-02 11:22:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:47,066 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-10-02 11:22:47,066 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-10-02 11:22:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-10-02 11:22:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-02 11:22:47,066 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:47,066 INFO L411 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:47,067 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash 579582992, now seen corresponding path program 61 times [2019-10-02 11:22:47,067 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:47,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:47,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:47,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:47,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:47,076 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:47,076 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:47,076 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:47,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:22:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:22:47,317 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-10-02 11:22:47,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:49,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:49,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:49,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-10-02 11:22:49,397 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-10-02 11:22:49,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-10-02 11:22:49,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-10-02 11:22:49,398 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-10-02 11:22:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:52,392 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-10-02 11:22:52,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-10-02 11:22:52,392 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-10-02 11:22:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:52,393 INFO L225 Difference]: With dead ends: 77 [2019-10-02 11:22:52,393 INFO L226 Difference]: Without dead ends: 74 [2019-10-02 11:22:52,393 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2019-10-02 11:22:52,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-02 11:22:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-10-02 11:22:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-02 11:22:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-10-02 11:22:52,401 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-10-02 11:22:52,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:52,401 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-10-02 11:22:52,401 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-10-02 11:22:52,401 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-10-02 11:22:52,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-02 11:22:52,402 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:52,402 INFO L411 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:52,402 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:52,402 INFO L82 PathProgramCache]: Analyzing trace with hash 787141095, now seen corresponding path program 62 times [2019-10-02 11:22:52,403 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:52,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:52,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:52,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:22:52,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:52,411 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:52,412 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:52,412 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:52,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:22:52,661 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:22:52,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:52,665 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-10-02 11:22:52,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:54,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:54,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:54,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-10-02 11:22:54,735 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-10-02 11:22:54,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-10-02 11:22:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-10-02 11:22:54,736 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-10-02 11:22:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:57,774 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-10-02 11:22:57,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-10-02 11:22:57,774 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-10-02 11:22:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:57,775 INFO L225 Difference]: With dead ends: 78 [2019-10-02 11:22:57,775 INFO L226 Difference]: Without dead ends: 75 [2019-10-02 11:22:57,775 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-10-02 11:22:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-02 11:22:57,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-10-02 11:22:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-02 11:22:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-10-02 11:22:57,783 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-10-02 11:22:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:57,783 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-10-02 11:22:57,783 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-10-02 11:22:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-10-02 11:22:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-02 11:22:57,784 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:57,784 INFO L411 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:57,784 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:57,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1368492304, now seen corresponding path program 63 times [2019-10-02 11:22:57,785 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:57,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:57,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:57,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:57,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:57,794 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:57,794 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:57,794 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:57,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:23:09,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-10-02 11:23:09,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:09,544 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-10-02 11:23:09,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:11,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:11,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:11,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-10-02 11:23:11,732 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-10-02 11:23:11,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-10-02 11:23:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-10-02 11:23:11,734 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-10-02 11:23:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:14,936 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-10-02 11:23:14,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-10-02 11:23:14,936 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-10-02 11:23:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:14,939 INFO L225 Difference]: With dead ends: 79 [2019-10-02 11:23:14,939 INFO L226 Difference]: Without dead ends: 76 [2019-10-02 11:23:14,940 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2019-10-02 11:23:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-02 11:23:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-10-02 11:23:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-02 11:23:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-10-02 11:23:14,947 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-10-02 11:23:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:14,947 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-10-02 11:23:14,947 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-10-02 11:23:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-10-02 11:23:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-02 11:23:14,948 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:14,948 INFO L411 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:14,948 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:14,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:14,948 INFO L82 PathProgramCache]: Analyzing trace with hash 526349063, now seen corresponding path program 64 times [2019-10-02 11:23:14,949 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:14,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:14,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:14,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:14,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:14,958 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:14,959 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:14,959 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:15,070 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:23:15,823 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:23:15,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:15,827 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-10-02 11:23:15,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:17,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:18,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:18,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-10-02 11:23:18,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-10-02 11:23:18,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-10-02 11:23:18,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-10-02 11:23:18,068 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-10-02 11:23:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:21,298 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-10-02 11:23:21,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-10-02 11:23:21,299 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-10-02 11:23:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:21,300 INFO L225 Difference]: With dead ends: 80 [2019-10-02 11:23:21,300 INFO L226 Difference]: Without dead ends: 77 [2019-10-02 11:23:21,301 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-10-02 11:23:21,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-02 11:23:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-10-02 11:23:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-02 11:23:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-10-02 11:23:21,309 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-10-02 11:23:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:21,310 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-10-02 11:23:21,310 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-10-02 11:23:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-10-02 11:23:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-02 11:23:21,311 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:21,311 INFO L411 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:21,311 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash -863110704, now seen corresponding path program 65 times [2019-10-02 11:23:21,311 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:21,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:21,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:21,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:21,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:21,322 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:21,322 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:21,322 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:21,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:23:21,795 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-10-02 11:23:21,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:21,799 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-10-02 11:23:21,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:24,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:24,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:24,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-10-02 11:23:24,161 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-10-02 11:23:24,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-10-02 11:23:24,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-10-02 11:23:24,162 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-10-02 11:23:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:27,583 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-10-02 11:23:27,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-02 11:23:27,584 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-10-02 11:23:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:27,584 INFO L225 Difference]: With dead ends: 81 [2019-10-02 11:23:27,584 INFO L226 Difference]: Without dead ends: 78 [2019-10-02 11:23:27,585 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-10-02 11:23:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-02 11:23:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-10-02 11:23:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-02 11:23:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-10-02 11:23:27,594 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-10-02 11:23:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:27,594 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-10-02 11:23:27,594 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-10-02 11:23:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-10-02 11:23:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-02 11:23:27,595 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:27,595 INFO L411 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:27,595 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:27,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash -986690521, now seen corresponding path program 66 times [2019-10-02 11:23:27,596 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:27,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:27,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:27,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:27,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:27,606 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:27,606 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:27,606 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:27,729 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:23:31,336 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-10-02 11:23:31,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:31,342 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-10-02 11:23:31,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:33,639 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:33,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:33,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-10-02 11:23:33,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-02 11:23:33,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-02 11:23:33,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-10-02 11:23:33,717 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-10-02 11:23:37,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:37,172 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-10-02 11:23:37,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-10-02 11:23:37,173 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-10-02 11:23:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:37,174 INFO L225 Difference]: With dead ends: 82 [2019-10-02 11:23:37,174 INFO L226 Difference]: Without dead ends: 79 [2019-10-02 11:23:37,174 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2019-10-02 11:23:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-02 11:23:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-02 11:23:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-02 11:23:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-10-02 11:23:37,183 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-10-02 11:23:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:37,183 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-10-02 11:23:37,183 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-02 11:23:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-10-02 11:23:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-02 11:23:37,184 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:37,184 INFO L411 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:37,184 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:37,185 INFO L82 PathProgramCache]: Analyzing trace with hash -522697552, now seen corresponding path program 67 times [2019-10-02 11:23:37,185 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:37,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:37,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:37,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:37,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:37,193 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:37,194 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:37,194 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:37,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:37,521 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-10-02 11:23:37,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:39,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:39,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:39,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-10-02 11:23:39,990 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-10-02 11:23:39,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-10-02 11:23:39,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-10-02 11:23:39,991 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-10-02 11:23:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:43,534 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-10-02 11:23:43,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-10-02 11:23:43,534 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-10-02 11:23:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:43,535 INFO L225 Difference]: With dead ends: 83 [2019-10-02 11:23:43,536 INFO L226 Difference]: Without dead ends: 80 [2019-10-02 11:23:43,536 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2019-10-02 11:23:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-02 11:23:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-10-02 11:23:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-02 11:23:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-10-02 11:23:43,545 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-10-02 11:23:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:43,545 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-10-02 11:23:43,545 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-10-02 11:23:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-10-02 11:23:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-02 11:23:43,546 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:43,546 INFO L411 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:43,546 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:43,546 INFO L82 PathProgramCache]: Analyzing trace with hash 976182599, now seen corresponding path program 68 times [2019-10-02 11:23:43,547 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:43,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:43,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:43,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:43,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:43,557 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:43,557 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:43,557 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:43,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:23:43,891 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:23:43,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:43,895 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-10-02 11:23:43,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:46,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:46,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:46,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-10-02 11:23:46,359 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-10-02 11:23:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-10-02 11:23:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-10-02 11:23:46,360 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-10-02 11:23:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:49,996 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-10-02 11:23:49,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-10-02 11:23:49,996 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-10-02 11:23:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:49,997 INFO L225 Difference]: With dead ends: 84 [2019-10-02 11:23:49,997 INFO L226 Difference]: Without dead ends: 81 [2019-10-02 11:23:49,998 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2019-10-02 11:23:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-02 11:23:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-10-02 11:23:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-02 11:23:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-10-02 11:23:50,005 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-10-02 11:23:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:50,006 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-10-02 11:23:50,006 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-10-02 11:23:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-10-02 11:23:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-02 11:23:50,006 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:50,006 INFO L411 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:50,006 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash 196827024, now seen corresponding path program 69 times [2019-10-02 11:23:50,007 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:50,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:50,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:50,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:50,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:50,016 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:50,016 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:50,016 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:50,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:24:08,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-10-02 11:24:08,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:08,212 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-10-02 11:24:08,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:10,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:10,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:10,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-10-02 11:24:10,830 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-10-02 11:24:10,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-10-02 11:24:10,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-10-02 11:24:10,831 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-10-02 11:24:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:14,662 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-10-02 11:24:14,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-10-02 11:24:14,662 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-10-02 11:24:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:14,663 INFO L225 Difference]: With dead ends: 85 [2019-10-02 11:24:14,663 INFO L226 Difference]: Without dead ends: 82 [2019-10-02 11:24:14,663 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2019-10-02 11:24:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-02 11:24:14,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-10-02 11:24:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-02 11:24:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-10-02 11:24:14,671 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-10-02 11:24:14,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:14,671 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-10-02 11:24:14,671 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-10-02 11:24:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-10-02 11:24:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-02 11:24:14,672 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:14,672 INFO L411 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:14,672 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:14,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1806607975, now seen corresponding path program 70 times [2019-10-02 11:24:14,672 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:14,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:14,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:14,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:14,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:14,679 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:14,679 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:14,679 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:14,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:24:15,721 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:24:15,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:15,727 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-10-02 11:24:15,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:18,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:18,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:18,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-10-02 11:24:18,424 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-10-02 11:24:18,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-10-02 11:24:18,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-10-02 11:24:18,425 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-10-02 11:24:22,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:22,221 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-10-02 11:24:22,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-10-02 11:24:22,221 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-10-02 11:24:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:22,222 INFO L225 Difference]: With dead ends: 86 [2019-10-02 11:24:22,222 INFO L226 Difference]: Without dead ends: 83 [2019-10-02 11:24:22,222 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2019-10-02 11:24:22,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-02 11:24:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-02 11:24:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-02 11:24:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-10-02 11:24:22,229 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-10-02 11:24:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:22,229 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-10-02 11:24:22,229 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-10-02 11:24:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-10-02 11:24:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-02 11:24:22,230 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:22,230 INFO L411 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:22,230 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:22,230 INFO L82 PathProgramCache]: Analyzing trace with hash 170209904, now seen corresponding path program 71 times [2019-10-02 11:24:22,231 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:22,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:22,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:22,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:22,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:22,239 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:22,239 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:22,239 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:22,385 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:24:22,703 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-10-02 11:24:22,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:22,709 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-10-02 11:24:22,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:25,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:25,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:25,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-10-02 11:24:25,453 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-10-02 11:24:25,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-10-02 11:24:25,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-10-02 11:24:25,454 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-10-02 11:24:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:29,418 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-10-02 11:24:29,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-10-02 11:24:29,419 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-10-02 11:24:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:29,420 INFO L225 Difference]: With dead ends: 87 [2019-10-02 11:24:29,420 INFO L226 Difference]: Without dead ends: 84 [2019-10-02 11:24:29,420 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2019-10-02 11:24:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-02 11:24:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-10-02 11:24:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-02 11:24:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-10-02 11:24:29,427 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-10-02 11:24:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:29,427 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-10-02 11:24:29,427 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-10-02 11:24:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-10-02 11:24:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-02 11:24:29,428 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:29,428 INFO L411 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:29,428 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:29,428 INFO L82 PathProgramCache]: Analyzing trace with hash 981477255, now seen corresponding path program 72 times [2019-10-02 11:24:29,429 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:29,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:29,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:29,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:29,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:29,437 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:29,437 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:29,437 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:29,585 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:24:33,411 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-10-02 11:24:33,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:33,417 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-10-02 11:24:33,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:36,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:36,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:36,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-10-02 11:24:36,642 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-10-02 11:24:36,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-10-02 11:24:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-10-02 11:24:36,642 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-10-02 11:24:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:40,713 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-10-02 11:24:40,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-10-02 11:24:40,714 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-10-02 11:24:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:40,714 INFO L225 Difference]: With dead ends: 88 [2019-10-02 11:24:40,714 INFO L226 Difference]: Without dead ends: 85 [2019-10-02 11:24:40,715 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-10-02 11:24:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-02 11:24:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-10-02 11:24:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-02 11:24:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-10-02 11:24:40,723 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-10-02 11:24:40,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:40,724 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-10-02 11:24:40,724 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-10-02 11:24:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-10-02 11:24:40,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-02 11:24:40,724 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:40,724 INFO L411 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:40,725 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:40,725 INFO L82 PathProgramCache]: Analyzing trace with hash 360961360, now seen corresponding path program 73 times [2019-10-02 11:24:40,725 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:40,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:40,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:40,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:40,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:40,733 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:40,733 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:40,733 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:40,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:41,115 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-10-02 11:24:41,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:43,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:44,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:44,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-10-02 11:24:44,011 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-10-02 11:24:44,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-10-02 11:24:44,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-10-02 11:24:44,011 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-10-02 11:24:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:48,252 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-10-02 11:24:48,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-10-02 11:24:48,252 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-10-02 11:24:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:48,253 INFO L225 Difference]: With dead ends: 89 [2019-10-02 11:24:48,253 INFO L226 Difference]: Without dead ends: 86 [2019-10-02 11:24:48,254 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2019-10-02 11:24:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-02 11:24:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-10-02 11:24:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-02 11:24:48,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-10-02 11:24:48,264 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-10-02 11:24:48,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:48,264 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-10-02 11:24:48,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-10-02 11:24:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-10-02 11:24:48,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-02 11:24:48,265 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:48,265 INFO L411 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:48,265 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:48,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1695162201, now seen corresponding path program 74 times [2019-10-02 11:24:48,265 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:48,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:48,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:48,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:48,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:48,275 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:48,275 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:48,275 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:48,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:24:48,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:24:48,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:48,673 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-10-02 11:24:48,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:51,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:51,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:51,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-10-02 11:24:51,580 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-10-02 11:24:51,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-10-02 11:24:51,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-10-02 11:24:51,580 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-10-02 11:24:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:55,865 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-10-02 11:24:55,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-10-02 11:24:55,866 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-10-02 11:24:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:55,866 INFO L225 Difference]: With dead ends: 90 [2019-10-02 11:24:55,866 INFO L226 Difference]: Without dead ends: 87 [2019-10-02 11:24:55,867 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2019-10-02 11:24:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-02 11:24:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-10-02 11:24:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-02 11:24:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-10-02 11:24:55,876 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-10-02 11:24:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:55,876 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-10-02 11:24:55,876 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-10-02 11:24:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-10-02 11:24:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-02 11:24:55,877 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:55,877 INFO L411 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:55,877 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1010483152, now seen corresponding path program 75 times [2019-10-02 11:24:55,878 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:55,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:55,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:55,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:55,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:55,887 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:55,887 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:55,887 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:56,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:25:21,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-10-02 11:25:21,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:21,185 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-10-02 11:25:21,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:24,088 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:24,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:24,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-10-02 11:25:24,187 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-10-02 11:25:24,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-10-02 11:25:24,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-10-02 11:25:24,188 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-10-02 11:25:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:28,551 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-10-02 11:25:28,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-10-02 11:25:28,551 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-10-02 11:25:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:28,552 INFO L225 Difference]: With dead ends: 91 [2019-10-02 11:25:28,552 INFO L226 Difference]: Without dead ends: 88 [2019-10-02 11:25:28,552 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2019-10-02 11:25:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-02 11:25:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-10-02 11:25:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-02 11:25:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-10-02 11:25:28,559 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-10-02 11:25:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:28,559 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-10-02 11:25:28,559 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-10-02 11:25:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-10-02 11:25:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-02 11:25:28,559 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:28,559 INFO L411 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:28,560 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:28,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:28,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1260269113, now seen corresponding path program 76 times [2019-10-02 11:25:28,560 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:28,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:28,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:28,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:28,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:28,568 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:28,568 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:28,568 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:28,708 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:25:29,724 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:25:29,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:29,729 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-10-02 11:25:29,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:32,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:32,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:32,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-10-02 11:25:32,807 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-10-02 11:25:32,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-10-02 11:25:32,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-10-02 11:25:32,808 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-10-02 11:25:37,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:37,291 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-10-02 11:25:37,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-10-02 11:25:37,291 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-10-02 11:25:37,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:37,292 INFO L225 Difference]: With dead ends: 92 [2019-10-02 11:25:37,293 INFO L226 Difference]: Without dead ends: 89 [2019-10-02 11:25:37,293 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2019-10-02 11:25:37,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-02 11:25:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-10-02 11:25:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-02 11:25:37,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-10-02 11:25:37,300 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-10-02 11:25:37,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:37,300 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-10-02 11:25:37,300 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-10-02 11:25:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-10-02 11:25:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-02 11:25:37,301 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:37,301 INFO L411 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:37,301 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:37,301 INFO L82 PathProgramCache]: Analyzing trace with hash -413699312, now seen corresponding path program 77 times [2019-10-02 11:25:37,301 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:37,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:37,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:37,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:37,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:37,310 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:37,310 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:37,310 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:37,455 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:25:37,815 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-10-02 11:25:37,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:37,820 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-10-02 11:25:37,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:40,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:40,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:40,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-10-02 11:25:40,955 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-10-02 11:25:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-10-02 11:25:40,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-10-02 11:25:40,956 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-10-02 11:25:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:45,574 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-10-02 11:25:45,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-10-02 11:25:45,574 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-10-02 11:25:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:45,575 INFO L225 Difference]: With dead ends: 93 [2019-10-02 11:25:45,575 INFO L226 Difference]: Without dead ends: 90 [2019-10-02 11:25:45,576 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-10-02 11:25:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-02 11:25:45,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-10-02 11:25:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-02 11:25:45,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-10-02 11:25:45,583 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-10-02 11:25:45,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:45,583 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-10-02 11:25:45,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-10-02 11:25:45,583 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-10-02 11:25:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-02 11:25:45,584 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:45,584 INFO L411 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:45,584 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:45,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:45,584 INFO L82 PathProgramCache]: Analyzing trace with hash 60160743, now seen corresponding path program 78 times [2019-10-02 11:25:45,584 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:45,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:45,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:45,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:45,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:45,592 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:45,592 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:45,592 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:45,739 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:25:51,681 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-10-02 11:25:51,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:51,690 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-10-02 11:25:51,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:54,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:54,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:54,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-10-02 11:25:54,863 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-10-02 11:25:54,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-10-02 11:25:54,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-10-02 11:25:54,864 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-10-02 11:25:59,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:59,605 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-10-02 11:25:59,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-10-02 11:25:59,605 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-10-02 11:25:59,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:59,606 INFO L225 Difference]: With dead ends: 94 [2019-10-02 11:25:59,606 INFO L226 Difference]: Without dead ends: 91 [2019-10-02 11:25:59,607 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2019-10-02 11:25:59,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-02 11:25:59,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-10-02 11:25:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-02 11:25:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-10-02 11:25:59,616 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-10-02 11:25:59,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:59,616 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-10-02 11:25:59,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-10-02 11:25:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-10-02 11:25:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-02 11:25:59,617 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:59,617 INFO L411 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:59,617 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:59,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1864920560, now seen corresponding path program 79 times [2019-10-02 11:25:59,617 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:59,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:59,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:59,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:59,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:59,627 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:59,627 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:59,627 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:59,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:26:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:26:00,140 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-10-02 11:26:00,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:03,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:03,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:03,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-10-02 11:26:03,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-10-02 11:26:03,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-10-02 11:26:03,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-10-02 11:26:03,352 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-10-02 11:26:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:08,139 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-10-02 11:26:08,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-10-02 11:26:08,140 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-10-02 11:26:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:08,141 INFO L225 Difference]: With dead ends: 95 [2019-10-02 11:26:08,141 INFO L226 Difference]: Without dead ends: 92 [2019-10-02 11:26:08,142 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2019-10-02 11:26:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-02 11:26:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-10-02 11:26:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-02 11:26:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-10-02 11:26:08,149 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-10-02 11:26:08,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:08,149 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-10-02 11:26:08,149 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-10-02 11:26:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-10-02 11:26:08,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-02 11:26:08,150 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:08,150 INFO L411 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:08,150 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1977900039, now seen corresponding path program 80 times [2019-10-02 11:26:08,150 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:08,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:08,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:08,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:26:08,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:08,159 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:08,159 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:08,159 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:08,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:26:08,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:26:08,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:08,626 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-10-02 11:26:08,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:12,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:12,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:12,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-10-02 11:26:12,107 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-10-02 11:26:12,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-10-02 11:26:12,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-10-02 11:26:12,108 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-10-02 11:26:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:17,035 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-10-02 11:26:17,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-10-02 11:26:17,036 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-10-02 11:26:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:17,037 INFO L225 Difference]: With dead ends: 96 [2019-10-02 11:26:17,037 INFO L226 Difference]: Without dead ends: 93 [2019-10-02 11:26:17,037 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2019-10-02 11:26:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-02 11:26:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-10-02 11:26:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-02 11:26:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-10-02 11:26:17,045 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-10-02 11:26:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:17,046 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-10-02 11:26:17,046 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-10-02 11:26:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-10-02 11:26:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-02 11:26:17,046 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:17,047 INFO L411 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:17,047 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1185296592, now seen corresponding path program 81 times [2019-10-02 11:26:17,047 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:17,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:17,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:17,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:17,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:17,056 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:17,057 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:17,057 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:17,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:26:53,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-10-02 11:26:53,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:53,555 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-10-02 11:26:53,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:56,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:56,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:56,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-10-02 11:26:56,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-10-02 11:26:56,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-10-02 11:26:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-10-02 11:26:56,918 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-10-02 11:27:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:02,006 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-10-02 11:27:02,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-10-02 11:27:02,007 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-10-02 11:27:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:02,007 INFO L225 Difference]: With dead ends: 97 [2019-10-02 11:27:02,007 INFO L226 Difference]: Without dead ends: 94 [2019-10-02 11:27:02,008 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2019-10-02 11:27:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-02 11:27:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-10-02 11:27:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-02 11:27:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-10-02 11:27:02,017 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-10-02 11:27:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:02,017 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-10-02 11:27:02,017 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-10-02 11:27:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-10-02 11:27:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-02 11:27:02,017 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:02,017 INFO L411 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:02,018 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:02,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:02,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1910573785, now seen corresponding path program 82 times [2019-10-02 11:27:02,018 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:02,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:02,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:02,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:02,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:02,024 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:02,024 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:02,024 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:02,189 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:27:03,368 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:27:03,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:27:03,373 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-10-02 11:27:03,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:06,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:06,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:06,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-10-02 11:27:06,787 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-10-02 11:27:06,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-10-02 11:27:06,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-10-02 11:27:06,789 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-10-02 11:27:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:11,953 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-10-02 11:27:11,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-10-02 11:27:11,954 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-10-02 11:27:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:11,954 INFO L225 Difference]: With dead ends: 98 [2019-10-02 11:27:11,954 INFO L226 Difference]: Without dead ends: 95 [2019-10-02 11:27:11,955 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2019-10-02 11:27:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-02 11:27:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-10-02 11:27:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-02 11:27:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-10-02 11:27:11,962 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-10-02 11:27:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:11,963 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-10-02 11:27:11,963 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-10-02 11:27:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-10-02 11:27:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-02 11:27:11,963 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:11,963 INFO L411 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:11,963 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:11,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:11,964 INFO L82 PathProgramCache]: Analyzing trace with hash 901692336, now seen corresponding path program 83 times [2019-10-02 11:27:11,964 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:11,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:11,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:11,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:11,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:11,971 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:11,971 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:11,971 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:12,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:27:12,581 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-10-02 11:27:12,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:27:12,586 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-10-02 11:27:12,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:16,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Exception during sending of exit command (exit): Broken pipe [2019-10-02 11:27:16,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:16,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-10-02 11:27:16,164 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-10-02 11:27:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-10-02 11:27:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-10-02 11:27:16,165 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-10-02 11:27:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:21,547 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-10-02 11:27:21,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-10-02 11:27:21,548 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-10-02 11:27:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:21,549 INFO L225 Difference]: With dead ends: 99 [2019-10-02 11:27:21,549 INFO L226 Difference]: Without dead ends: 96 [2019-10-02 11:27:21,550 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2019-10-02 11:27:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-02 11:27:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-10-02 11:27:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-02 11:27:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-10-02 11:27:21,558 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-10-02 11:27:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:21,558 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-10-02 11:27:21,558 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-10-02 11:27:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-10-02 11:27:21,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-02 11:27:21,558 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:21,558 INFO L411 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:21,559 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:21,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2112371129, now seen corresponding path program 84 times [2019-10-02 11:27:21,559 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:21,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:21,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:21,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:21,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:21,566 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:21,566 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:21,566 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:21,745 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:27:29,119 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-10-02 11:27:29,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:27:29,129 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-10-02 11:27:29,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:32,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:32,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:32,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-10-02 11:27:32,743 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-10-02 11:27:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-10-02 11:27:32,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-10-02 11:27:32,744 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-10-02 11:27:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:38,197 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-10-02 11:27:38,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-10-02 11:27:38,198 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-10-02 11:27:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:38,199 INFO L225 Difference]: With dead ends: 100 [2019-10-02 11:27:38,199 INFO L226 Difference]: Without dead ends: 97 [2019-10-02 11:27:38,199 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-10-02 11:27:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-02 11:27:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-10-02 11:27:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-02 11:27:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-10-02 11:27:38,217 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-10-02 11:27:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:38,217 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-10-02 11:27:38,218 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-10-02 11:27:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-10-02 11:27:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-02 11:27:38,218 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:38,218 INFO L411 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:38,219 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:38,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:38,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1059058032, now seen corresponding path program 85 times [2019-10-02 11:27:38,219 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:38,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:38,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:38,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:38,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:38,229 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:38,229 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:38,229 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:38,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:27:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:27:38,758 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-10-02 11:27:38,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:42,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:42,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:42,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-10-02 11:27:42,450 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-10-02 11:27:42,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-10-02 11:27:42,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-10-02 11:27:42,451 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-10-02 11:27:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:48,038 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-10-02 11:27:48,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-10-02 11:27:48,038 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-10-02 11:27:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:48,041 INFO L225 Difference]: With dead ends: 101 [2019-10-02 11:27:48,042 INFO L226 Difference]: Without dead ends: 98 [2019-10-02 11:27:48,042 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2019-10-02 11:27:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-02 11:27:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-10-02 11:27:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-02 11:27:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-10-02 11:27:48,052 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-10-02 11:27:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:48,052 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-10-02 11:27:48,052 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-10-02 11:27:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-10-02 11:27:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-02 11:27:48,053 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:48,053 INFO L411 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:48,053 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:48,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1528876903, now seen corresponding path program 86 times [2019-10-02 11:27:48,054 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:48,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:48,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:48,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:27:48,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:48,063 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:48,063 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:48,063 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:48,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:27:48,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:27:48,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:27:48,593 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-10-02 11:27:48,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:52,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:52,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:52,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-10-02 11:27:52,371 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-10-02 11:27:52,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-10-02 11:27:52,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-10-02 11:27:52,372 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-10-02 11:27:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:58,105 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-10-02 11:27:58,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-10-02 11:27:58,106 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-10-02 11:27:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:58,106 INFO L225 Difference]: With dead ends: 102 [2019-10-02 11:27:58,106 INFO L226 Difference]: Without dead ends: 99 [2019-10-02 11:27:58,107 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2019-10-02 11:27:58,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-02 11:27:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-10-02 11:27:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-02 11:27:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-10-02 11:27:58,114 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-10-02 11:27:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:58,114 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-10-02 11:27:58,114 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-10-02 11:27:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-10-02 11:27:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-02 11:27:58,115 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:58,115 INFO L411 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:58,115 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:58,115 INFO L82 PathProgramCache]: Analyzing trace with hash 150481264, now seen corresponding path program 87 times [2019-10-02 11:27:58,116 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:58,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:58,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:58,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:58,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:58,125 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:58,125 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:58,125 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:58,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:28:49,876 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-10-02 11:28:49,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:28:49,884 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-10-02 11:28:49,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:53,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:53,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:53,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-10-02 11:28:53,717 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-10-02 11:28:53,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-10-02 11:28:53,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-10-02 11:28:53,718 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-10-02 11:28:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:59,532 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-10-02 11:28:59,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-10-02 11:28:59,532 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-10-02 11:28:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:59,533 INFO L225 Difference]: With dead ends: 103 [2019-10-02 11:28:59,533 INFO L226 Difference]: Without dead ends: 100 [2019-10-02 11:28:59,534 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2019-10-02 11:28:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-02 11:28:59,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-10-02 11:28:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-02 11:28:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-10-02 11:28:59,541 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-10-02 11:28:59,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:59,541 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-10-02 11:28:59,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-10-02 11:28:59,541 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-10-02 11:28:59,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-02 11:28:59,542 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:59,542 INFO L411 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:59,542 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:59,542 INFO L82 PathProgramCache]: Analyzing trace with hash 369889415, now seen corresponding path program 88 times [2019-10-02 11:28:59,542 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:59,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:59,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:59,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:28:59,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:59,551 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:59,551 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:59,551 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:28:59,745 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:29:01,093 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:29:01,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:01,099 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-10-02 11:29:01,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:04,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:29:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:05,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:29:05,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-10-02 11:29:05,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-10-02 11:29:05,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-10-02 11:29:05,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-10-02 11:29:05,081 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-10-02 11:29:11,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:11,039 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-10-02 11:29:11,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-10-02 11:29:11,039 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-10-02 11:29:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:11,039 INFO L225 Difference]: With dead ends: 104 [2019-10-02 11:29:11,040 INFO L226 Difference]: Without dead ends: 101 [2019-10-02 11:29:11,040 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-10-02 11:29:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-02 11:29:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-10-02 11:29:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-02 11:29:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-10-02 11:29:11,049 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-10-02 11:29:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:11,049 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-10-02 11:29:11,049 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-10-02 11:29:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-10-02 11:29:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-02 11:29:11,049 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:11,049 INFO L411 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:11,050 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1418392496, now seen corresponding path program 89 times [2019-10-02 11:29:11,050 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:11,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:11,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:11,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:11,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:11,068 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:11,068 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:11,068 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:29:11,258 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:29:11,789 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-10-02 11:29:11,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:11,796 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-10-02 11:29:11,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:15,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:29:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:15,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:29:15,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-10-02 11:29:15,964 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-10-02 11:29:15,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-10-02 11:29:15,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-10-02 11:29:15,965 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-10-02 11:29:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:22,267 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-10-02 11:29:22,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-10-02 11:29:22,268 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-10-02 11:29:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:22,269 INFO L225 Difference]: With dead ends: 105 [2019-10-02 11:29:22,269 INFO L226 Difference]: Without dead ends: 102 [2019-10-02 11:29:22,270 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2019-10-02 11:29:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-02 11:29:22,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-10-02 11:29:22,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-02 11:29:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-10-02 11:29:22,278 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-10-02 11:29:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:22,278 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-10-02 11:29:22,278 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-10-02 11:29:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-10-02 11:29:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-02 11:29:22,278 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:22,279 INFO L411 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:22,279 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:22,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:22,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1020556889, now seen corresponding path program 90 times [2019-10-02 11:29:22,279 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:22,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:22,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:22,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:22,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:22,287 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:22,287 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:22,288 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:29:22,494 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:29:34,429 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-10-02 11:29:34,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:34,441 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-10-02 11:29:34,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:38,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:29:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:38,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:29:38,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-10-02 11:29:38,611 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-10-02 11:29:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-10-02 11:29:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-10-02 11:29:38,612 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-10-02 11:29:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:44,848 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-10-02 11:29:44,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-10-02 11:29:44,848 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-10-02 11:29:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:44,849 INFO L225 Difference]: With dead ends: 106 [2019-10-02 11:29:44,849 INFO L226 Difference]: Without dead ends: 103 [2019-10-02 11:29:44,850 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=189, Invalid=8741, Unknown=0, NotChecked=0, Total=8930 [2019-10-02 11:29:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-02 11:29:44,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-10-02 11:29:44,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-02 11:29:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-10-02 11:29:44,858 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-10-02 11:29:44,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:44,858 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-10-02 11:29:44,858 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-10-02 11:29:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-10-02 11:29:44,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-02 11:29:44,859 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:44,859 INFO L411 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:44,859 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:44,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:44,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1572554960, now seen corresponding path program 91 times [2019-10-02 11:29:44,860 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:44,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:44,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:44,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:44,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:44,869 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:44,869 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:44,869 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:29:45,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:29:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:29:45,491 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-10-02 11:29:45,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:49,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:29:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:49,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:29:49,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-10-02 11:29:49,802 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-10-02 11:29:49,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-10-02 11:29:49,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-10-02 11:29:49,803 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-10-02 11:29:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:56,204 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-10-02 11:29:56,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-10-02 11:29:56,205 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-10-02 11:29:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:56,206 INFO L225 Difference]: With dead ends: 107 [2019-10-02 11:29:56,206 INFO L226 Difference]: Without dead ends: 104 [2019-10-02 11:29:56,206 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2019-10-02 11:29:56,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-02 11:29:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-10-02 11:29:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-02 11:29:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-10-02 11:29:56,218 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-10-02 11:29:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:56,218 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-10-02 11:29:56,218 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-10-02 11:29:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-10-02 11:29:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-02 11:29:56,219 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:56,219 INFO L411 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:56,219 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:56,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:56,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1504625977, now seen corresponding path program 92 times [2019-10-02 11:29:56,220 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:56,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:56,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:56,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:29:56,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:56,230 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:56,230 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:56,230 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:29:56,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:29:56,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:29:56,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:56,833 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-10-02 11:29:56,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:30:01,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:30:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:30:01,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:30:01,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-10-02 11:30:01,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-10-02 11:30:01,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-10-02 11:30:01,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-10-02 11:30:01,232 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-10-02 11:30:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:30:07,847 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-10-02 11:30:07,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-10-02 11:30:07,847 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-10-02 11:30:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:30:07,848 INFO L225 Difference]: With dead ends: 108 [2019-10-02 11:30:07,848 INFO L226 Difference]: Without dead ends: 105 [2019-10-02 11:30:07,849 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-10-02 11:30:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-02 11:30:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-10-02 11:30:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-02 11:30:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-10-02 11:30:07,861 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-10-02 11:30:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:30:07,862 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-10-02 11:30:07,862 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-10-02 11:30:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-10-02 11:30:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-02 11:30:07,862 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:30:07,863 INFO L411 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:30:07,863 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:30:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:30:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash 601172496, now seen corresponding path program 93 times [2019-10-02 11:30:07,863 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:30:07,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:30:07,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:07,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:30:07,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:07,874 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:30:07,874 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:30:07,874 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:30:08,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:31:19,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-10-02 11:31:19,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:31:19,122 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-10-02 11:31:19,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:31:23,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:31:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:31:23,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:31:23,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-10-02 11:31:23,669 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-10-02 11:31:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-10-02 11:31:23,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-10-02 11:31:23,675 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-10-02 11:31:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:31:30,488 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-10-02 11:31:30,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-10-02 11:31:30,489 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-10-02 11:31:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:31:30,489 INFO L225 Difference]: With dead ends: 109 [2019-10-02 11:31:30,490 INFO L226 Difference]: Without dead ends: 106 [2019-10-02 11:31:30,490 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-10-02 11:31:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-02 11:31:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-10-02 11:31:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-02 11:31:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-10-02 11:31:30,502 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-10-02 11:31:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:31:30,502 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-10-02 11:31:30,502 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-10-02 11:31:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-10-02 11:31:30,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-02 11:31:30,503 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:31:30,503 INFO L411 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:31:30,503 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:31:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:31:30,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1456415719, now seen corresponding path program 94 times [2019-10-02 11:31:30,504 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:31:30,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:31:30,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:30,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:31:30,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:30,514 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:31:30,514 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:31:30,514 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:31:30,732 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:31:32,250 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:31:32,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:31:32,257 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-10-02 11:31:32,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:31:36,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:31:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:31:36,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:31:36,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-10-02 11:31:36,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-10-02 11:31:36,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-10-02 11:31:36,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-10-02 11:31:36,793 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-10-02 11:31:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:31:43,604 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-10-02 11:31:43,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-10-02 11:31:43,604 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-10-02 11:31:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:31:43,605 INFO L225 Difference]: With dead ends: 110 [2019-10-02 11:31:43,605 INFO L226 Difference]: Without dead ends: 107 [2019-10-02 11:31:43,606 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-10-02 11:31:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-02 11:31:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-10-02 11:31:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-02 11:31:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-10-02 11:31:43,618 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-10-02 11:31:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:31:43,618 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-10-02 11:31:43,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-10-02 11:31:43,618 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-10-02 11:31:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-02 11:31:43,619 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:31:43,619 INFO L411 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:31:43,619 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:31:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:31:43,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2095815440, now seen corresponding path program 95 times [2019-10-02 11:31:43,620 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:31:43,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:31:43,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:43,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:31:43,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:43,630 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:31:43,631 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:31:43,631 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:31:43,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:31:44,443 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-10-02 11:31:44,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:31:44,450 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-10-02 11:31:44,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:31:49,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:31:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:31:49,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:31:49,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-10-02 11:31:49,301 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-10-02 11:31:49,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-10-02 11:31:49,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-10-02 11:31:49,305 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-10-02 11:31:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:31:56,223 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-10-02 11:31:56,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-10-02 11:31:56,223 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-10-02 11:31:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:31:56,225 INFO L225 Difference]: With dead ends: 111 [2019-10-02 11:31:56,225 INFO L226 Difference]: Without dead ends: 108 [2019-10-02 11:31:56,226 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=199, Invalid=9701, Unknown=0, NotChecked=0, Total=9900 [2019-10-02 11:31:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-02 11:31:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-10-02 11:31:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-02 11:31:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-10-02 11:31:56,237 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-10-02 11:31:56,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:31:56,238 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-10-02 11:31:56,238 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-10-02 11:31:56,238 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-10-02 11:31:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-02 11:31:56,239 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:31:56,239 INFO L411 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:31:56,239 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:31:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:31:56,239 INFO L82 PathProgramCache]: Analyzing trace with hash -545831673, now seen corresponding path program 96 times [2019-10-02 11:31:56,239 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:31:56,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:31:56,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:56,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:31:56,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:56,250 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:31:56,250 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:31:56,250 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:31:56,490 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:32:10,855 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-10-02 11:32:10,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:32:10,867 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-10-02 11:32:10,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:32:15,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:32:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:32:15,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:32:15,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-10-02 11:32:15,465 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-10-02 11:32:15,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-10-02 11:32:15,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-10-02 11:32:15,466 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-10-02 11:32:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:32:22,488 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-10-02 11:32:22,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-10-02 11:32:22,489 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-10-02 11:32:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:32:22,490 INFO L225 Difference]: With dead ends: 112 [2019-10-02 11:32:22,490 INFO L226 Difference]: Without dead ends: 109 [2019-10-02 11:32:22,491 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=201, Invalid=9899, Unknown=0, NotChecked=0, Total=10100 [2019-10-02 11:32:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-02 11:32:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-10-02 11:32:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-02 11:32:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-10-02 11:32:22,500 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-10-02 11:32:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:32:22,501 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-10-02 11:32:22,501 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-10-02 11:32:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-10-02 11:32:22,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-02 11:32:22,501 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:32:22,502 INFO L411 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:32:22,502 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:32:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:32:22,502 INFO L82 PathProgramCache]: Analyzing trace with hash 259024848, now seen corresponding path program 97 times [2019-10-02 11:32:22,502 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:32:22,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:32:22,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:22,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:32:22,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:22,511 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:32:22,511 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:32:22,511 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:32:22,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:32:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:32:23,201 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-10-02 11:32:23,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:32:27,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:32:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:32:27,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:32:27,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-10-02 11:32:27,947 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-10-02 11:32:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-10-02 11:32:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-10-02 11:32:27,947 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-10-02 11:32:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:32:35,139 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-10-02 11:32:35,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-10-02 11:32:35,140 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-10-02 11:32:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:32:35,140 INFO L225 Difference]: With dead ends: 113 [2019-10-02 11:32:35,140 INFO L226 Difference]: Without dead ends: 110 [2019-10-02 11:32:35,141 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=203, Invalid=10099, Unknown=0, NotChecked=0, Total=10302 [2019-10-02 11:32:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-02 11:32:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-10-02 11:32:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-02 11:32:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-10-02 11:32:35,150 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-10-02 11:32:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:32:35,150 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-10-02 11:32:35,150 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-10-02 11:32:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-10-02 11:32:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-02 11:32:35,151 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:32:35,151 INFO L411 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:32:35,151 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:32:35,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:32:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash -560226777, now seen corresponding path program 98 times [2019-10-02 11:32:35,151 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:32:35,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:32:35,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:35,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:32:35,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:35,160 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:32:35,160 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:32:35,160 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:32:35,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:32:35,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:32:35,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:32:35,868 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-10-02 11:32:35,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:32:40,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:32:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:32:40,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:32:40,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-10-02 11:32:40,720 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-10-02 11:32:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-10-02 11:32:40,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-10-02 11:32:40,721 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-10-02 11:32:48,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:32:48,049 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-10-02 11:32:48,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-10-02 11:32:48,049 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-10-02 11:32:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:32:48,051 INFO L225 Difference]: With dead ends: 114 [2019-10-02 11:32:48,051 INFO L226 Difference]: Without dead ends: 111 [2019-10-02 11:32:48,051 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-10-02 11:32:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-02 11:32:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-10-02 11:32:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-02 11:32:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-10-02 11:32:48,060 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-10-02 11:32:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:32:48,061 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-10-02 11:32:48,061 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-10-02 11:32:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-10-02 11:32:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-02 11:32:48,061 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:32:48,061 INFO L411 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:32:48,061 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:32:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:32:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash -187223376, now seen corresponding path program 99 times [2019-10-02 11:32:48,062 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:32:48,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:32:48,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:48,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:32:48,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:48,070 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:32:48,070 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:32:48,070 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:32:48,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2