java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:08:10,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:08:10,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:08:10,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 12:08:10,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 12:08:10,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 12:08:10,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 12:08:10,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 12:08:10,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 12:08:10,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 12:08:10,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 12:08:10,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 12:08:10,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:08:10,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:08:10,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:08:10,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:08:10,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:08:10,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:08:10,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:08:10,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:08:10,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:08:10,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:08:10,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:08:10,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:08:10,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:08:10,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 12:08:10,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 12:08:10,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 12:08:10,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 12:08:10,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 12:08:10,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 12:08:10,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 12:08:10,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 12:08:10,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:08:10,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:08:10,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:08:10,049 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 [2019-09-05 12:08:10,063 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:08:10,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:08:10,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:08:10,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:08:10,065 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:08:10,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:08:10,065 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:08:10,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:08:10,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:08:10,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:08:10,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:08:10,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:08:10,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:08:10,067 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:08:10,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:08:10,067 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:08:10,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:08:10,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:08:10,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:08:10,068 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:08:10,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:08:10,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:08:10,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:08:10,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:08:10,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:08:10,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:08:10,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:08:10,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:08:10,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:08:10,098 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:08:10,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:08:10,119 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:08:10,120 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:08:10,121 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:08:10,122 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-09-05 12:08:10,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9398173c7/9dca19dbc4b446cc9154c75397e85079/FLAGe22e2ff82 [2019-09-05 12:08:10,638 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:08:10,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-09-05 12:08:10,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9398173c7/9dca19dbc4b446cc9154c75397e85079/FLAGe22e2ff82 [2019-09-05 12:08:10,979 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9398173c7/9dca19dbc4b446cc9154c75397e85079 [2019-09-05 12:08:10,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:08:10,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:08:10,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:08:10,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:08:10,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:08:10,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:08:10" (1/1) ... [2019-09-05 12:08:11,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36718726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:10, skipping insertion in model container [2019-09-05 12:08:11,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:08:10" (1/1) ... [2019-09-05 12:08:11,008 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:08:11,028 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:08:11,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:08:11,189 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:08:11,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:08:11,226 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:08:11,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:11 WrapperNode [2019-09-05 12:08:11,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:08:11,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:08:11,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:08:11,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:08:11,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:11" (1/1) ... [2019-09-05 12:08:11,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:11" (1/1) ... [2019-09-05 12:08:11,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:11" (1/1) ... [2019-09-05 12:08:11,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:11" (1/1) ... [2019-09-05 12:08:11,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:11" (1/1) ... [2019-09-05 12:08:11,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:11" (1/1) ... [2019-09-05 12:08:11,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:11" (1/1) ... [2019-09-05 12:08:11,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:08:11,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:08:11,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:08:11,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:08:11,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:11" (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 [2019-09-05 12:08:11,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:08:11,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:08:11,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:08:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:08:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 12:08:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:08:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:08:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:08:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:08:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:08:11,646 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:08:11,646 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-05 12:08:11,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:08:11 BoogieIcfgContainer [2019-09-05 12:08:11,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:08:11,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:08:11,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:08:11,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:08:11,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:08:10" (1/3) ... [2019-09-05 12:08:11,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2325d38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:08:11, skipping insertion in model container [2019-09-05 12:08:11,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:08:11" (2/3) ... [2019-09-05 12:08:11,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2325d38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:08:11, skipping insertion in model container [2019-09-05 12:08:11,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:08:11" (3/3) ... [2019-09-05 12:08:11,663 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2019-09-05 12:08:11,684 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:08:11,693 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:08:11,706 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:08:11,738 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:08:11,739 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:08:11,739 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:08:11,739 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:08:11,739 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:08:11,740 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:08:11,740 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:08:11,740 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:08:11,740 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:08:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-05 12:08:11,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 12:08:11,770 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:11,771 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:11,775 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:11,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:11,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1720236422, now seen corresponding path program 1 times [2019-09-05 12:08:11,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:11,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:11,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:11,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:11,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:11,862 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:11,862 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:11,863 INFO L223 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 [2019-09-05 12:08:11,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:11,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-05 12:08:11,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:12,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:12,129 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:08:12,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-09-05 12:08:12,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:08:12,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:08:12,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:08:12,151 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 9 states. [2019-09-05 12:08:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:12,366 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-09-05 12:08:12,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:08:12,369 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-09-05 12:08:12,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:12,379 INFO L225 Difference]: With dead ends: 41 [2019-09-05 12:08:12,379 INFO L226 Difference]: Without dead ends: 18 [2019-09-05 12:08:12,384 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:08:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-05 12:08:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-05 12:08:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-05 12:08:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-05 12:08:12,430 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-09-05 12:08:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:12,431 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-05 12:08:12,432 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:08:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-05 12:08:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-05 12:08:12,434 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:12,434 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:12,434 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:12,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1787659072, now seen corresponding path program 1 times [2019-09-05 12:08:12,436 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:12,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:12,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:12,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:12,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:12,471 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:12,471 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:12,472 INFO L223 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 [2019-09-05 12:08:12,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:12,506 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-05 12:08:12,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:12,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:12,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:12,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:08:12,640 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:08:12,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:08:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:08:12,641 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-09-05 12:08:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:12,750 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-05 12:08:12,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:08:12,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-09-05 12:08:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:12,751 INFO L225 Difference]: With dead ends: 22 [2019-09-05 12:08:12,752 INFO L226 Difference]: Without dead ends: 19 [2019-09-05 12:08:12,753 INFO L628 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 [2019-09-05 12:08:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-05 12:08:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-05 12:08:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-05 12:08:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-09-05 12:08:12,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-09-05 12:08:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:12,764 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-09-05 12:08:12,764 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:08:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-09-05 12:08:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-05 12:08:12,765 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:12,766 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:12,767 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:12,768 INFO L82 PathProgramCache]: Analyzing trace with hash -417206074, now seen corresponding path program 2 times [2019-09-05 12:08:12,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:12,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:12,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:12,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:12,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:12,802 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:12,802 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:12,802 INFO L223 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:12,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:08:12,855 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:08:12,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:12,857 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-05 12:08:12,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:13,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:13,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:13,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-05 12:08:13,035 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:08:13,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:08:13,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:08:13,036 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-09-05 12:08:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:13,147 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-09-05 12:08:13,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:08:13,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-09-05 12:08:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:13,149 INFO L225 Difference]: With dead ends: 23 [2019-09-05 12:08:13,149 INFO L226 Difference]: Without dead ends: 20 [2019-09-05 12:08:13,150 INFO L628 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 [2019-09-05 12:08:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-05 12:08:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-05 12:08:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-05 12:08:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-05 12:08:13,157 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-09-05 12:08:13,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:13,158 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-05 12:08:13,158 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:08:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-05 12:08:13,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:08:13,160 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:13,160 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:13,160 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:13,161 INFO L82 PathProgramCache]: Analyzing trace with hash -48548864, now seen corresponding path program 3 times [2019-09-05 12:08:13,161 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:13,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:13,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:13,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:13,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:13,183 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:13,183 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:13,183 INFO L223 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 [2019-09-05 12:08:13,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:08:13,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-05 12:08:13,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:13,230 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-05 12:08:13,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:13,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:13,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:13,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-05 12:08:13,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 12:08:13,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 12:08:13,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:08:13,371 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-09-05 12:08:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:13,492 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-09-05 12:08:13,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 12:08:13,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-09-05 12:08:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:13,494 INFO L225 Difference]: With dead ends: 24 [2019-09-05 12:08:13,495 INFO L226 Difference]: Without dead ends: 21 [2019-09-05 12:08:13,495 INFO L628 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 [2019-09-05 12:08:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-05 12:08:13,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-05 12:08:13,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-05 12:08:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-09-05 12:08:13,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-09-05 12:08:13,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:13,500 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-09-05 12:08:13,500 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 12:08:13,501 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-09-05 12:08:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-05 12:08:13,501 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:13,502 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:13,502 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1505077242, now seen corresponding path program 4 times [2019-09-05 12:08:13,503 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:13,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:13,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:13,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:13,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:13,515 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:13,515 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:13,515 INFO L223 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) [2019-09-05 12:08:13,536 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:13,637 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:08:13,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:13,639 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-05 12:08:13,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:13,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:13,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:13,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:08:13,793 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:08:13,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:08:13,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:08:13,794 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-09-05 12:08:13,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:13,947 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-09-05 12:08:13,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:08:13,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-09-05 12:08:13,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:13,948 INFO L225 Difference]: With dead ends: 25 [2019-09-05 12:08:13,948 INFO L226 Difference]: Without dead ends: 22 [2019-09-05 12:08:13,949 INFO L628 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 [2019-09-05 12:08:13,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-05 12:08:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-05 12:08:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-05 12:08:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-09-05 12:08:13,954 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-09-05 12:08:13,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:13,954 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-09-05 12:08:13,954 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:08:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-09-05 12:08:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-05 12:08:13,955 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:13,955 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:13,956 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:13,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:13,956 INFO L82 PathProgramCache]: Analyzing trace with hash 587183296, now seen corresponding path program 5 times [2019-09-05 12:08:13,956 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:13,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:13,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:13,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:13,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:13,968 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:13,968 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:13,969 INFO L223 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) [2019-09-05 12:08:13,985 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:14,010 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-05 12:08:14,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:14,012 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-05 12:08:14,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:14,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:14,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:14,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-05 12:08:14,174 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:08:14,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:08:14,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:08:14,175 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-09-05 12:08:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:14,314 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-05 12:08:14,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:08:14,315 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-09-05 12:08:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:14,316 INFO L225 Difference]: With dead ends: 26 [2019-09-05 12:08:14,316 INFO L226 Difference]: Without dead ends: 23 [2019-09-05 12:08:14,317 INFO L628 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 [2019-09-05 12:08:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-05 12:08:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-05 12:08:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-05 12:08:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-09-05 12:08:14,324 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-09-05 12:08:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:14,325 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-09-05 12:08:14,325 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:08:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-09-05 12:08:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-05 12:08:14,327 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:14,327 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:14,327 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:14,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1022750534, now seen corresponding path program 6 times [2019-09-05 12:08:14,328 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:14,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:14,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:14,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:14,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:14,352 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:14,352 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:14,352 INFO L223 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 [2019-09-05 12:08:14,376 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:08:14,400 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-05 12:08:14,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:14,402 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-05 12:08:14,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:14,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:14,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:14,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-05 12:08:14,561 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:08:14,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:08:14,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:08:14,562 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-09-05 12:08:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:14,706 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-05 12:08:14,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:08:14,706 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-09-05 12:08:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:14,707 INFO L225 Difference]: With dead ends: 27 [2019-09-05 12:08:14,707 INFO L226 Difference]: Without dead ends: 24 [2019-09-05 12:08:14,708 INFO L628 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 [2019-09-05 12:08:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-05 12:08:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-05 12:08:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-05 12:08:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-05 12:08:14,712 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-09-05 12:08:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:14,713 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-05 12:08:14,713 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:08:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-05 12:08:14,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-05 12:08:14,714 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:14,714 INFO L399 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:14,714 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:14,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:14,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1640433024, now seen corresponding path program 7 times [2019-09-05 12:08:14,715 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:14,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:14,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:14,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:14,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:14,725 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:14,725 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:14,725 INFO L223 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) [2019-09-05 12:08:14,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:14,773 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-05 12:08:14,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:14,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:14,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:14,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-05 12:08:14,992 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:08:14,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:08:14,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:08:14,993 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-09-05 12:08:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:15,187 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-05 12:08:15,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:08:15,188 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-09-05 12:08:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:15,189 INFO L225 Difference]: With dead ends: 28 [2019-09-05 12:08:15,189 INFO L226 Difference]: Without dead ends: 25 [2019-09-05 12:08:15,190 INFO L628 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 [2019-09-05 12:08:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-05 12:08:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-05 12:08:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-05 12:08:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-09-05 12:08:15,195 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-09-05 12:08:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:15,195 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-09-05 12:08:15,195 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:08:15,195 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-09-05 12:08:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-05 12:08:15,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:15,196 INFO L399 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:15,197 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash -686246266, now seen corresponding path program 8 times [2019-09-05 12:08:15,197 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:15,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:15,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:15,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:15,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:15,209 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:15,209 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:15,209 INFO L223 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) [2019-09-05 12:08:15,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:15,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:08:15,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:15,275 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-05 12:08:15,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:15,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:15,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:15,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-05 12:08:15,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-05 12:08:15,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-05 12:08:15,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:08:15,524 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-09-05 12:08:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:15,715 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-09-05 12:08:15,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:08:15,716 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-09-05 12:08:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:15,717 INFO L225 Difference]: With dead ends: 29 [2019-09-05 12:08:15,717 INFO L226 Difference]: Without dead ends: 26 [2019-09-05 12:08:15,718 INFO L628 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 [2019-09-05 12:08:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-05 12:08:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-05 12:08:15,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-05 12:08:15,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-05 12:08:15,725 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-09-05 12:08:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:15,725 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-05 12:08:15,725 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-05 12:08:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-05 12:08:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-05 12:08:15,726 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:15,727 INFO L399 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:15,727 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash 201139776, now seen corresponding path program 9 times [2019-09-05 12:08:15,728 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:15,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:15,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:15,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:15,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:15,748 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:15,748 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:15,748 INFO L223 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) [2019-09-05 12:08:15,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:15,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-05 12:08:15,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:15,809 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-05 12:08:15,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:16,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:16,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:16,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-05 12:08:16,051 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:08:16,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:08:16,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:08:16,053 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-09-05 12:08:16,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:16,267 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-09-05 12:08:16,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 12:08:16,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-09-05 12:08:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:16,268 INFO L225 Difference]: With dead ends: 30 [2019-09-05 12:08:16,268 INFO L226 Difference]: Without dead ends: 27 [2019-09-05 12:08:16,269 INFO L628 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 [2019-09-05 12:08:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-05 12:08:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-05 12:08:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-05 12:08:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-05 12:08:16,273 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-09-05 12:08:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:16,274 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-05 12:08:16,274 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:08:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-05 12:08:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-05 12:08:16,275 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:16,275 INFO L399 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:16,275 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:16,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:16,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1940303302, now seen corresponding path program 10 times [2019-09-05 12:08:16,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:16,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:16,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:16,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:16,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:16,284 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:16,285 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:16,285 INFO L223 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:16,299 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:08:16,435 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:08:16,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:16,437 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-05 12:08:16,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:16,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:16,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:16,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:08:16,705 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:08:16,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:08:16,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:08:16,706 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-09-05 12:08:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:16,961 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-09-05 12:08:16,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:08:16,962 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-09-05 12:08:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:16,963 INFO L225 Difference]: With dead ends: 31 [2019-09-05 12:08:16,963 INFO L226 Difference]: Without dead ends: 28 [2019-09-05 12:08:16,964 INFO L628 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 [2019-09-05 12:08:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-05 12:08:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-05 12:08:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-05 12:08:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-05 12:08:16,970 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-09-05 12:08:16,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:16,971 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-05 12:08:16,971 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:08:16,971 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-05 12:08:16,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-05 12:08:16,972 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:16,972 INFO L399 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:16,972 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:16,972 INFO L82 PathProgramCache]: Analyzing trace with hash 19797760, now seen corresponding path program 11 times [2019-09-05 12:08:16,972 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:16,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:16,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:16,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:16,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:16,981 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:16,981 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:16,981 INFO L223 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 [2019-09-05 12:08:16,998 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:08:17,035 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-05 12:08:17,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:17,037 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-05 12:08:17,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:17,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:17,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:17,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-05 12:08:17,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 12:08:17,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 12:08:17,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:08:17,364 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-09-05 12:08:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:17,751 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-09-05 12:08:17,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:08:17,752 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-09-05 12:08:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:17,753 INFO L225 Difference]: With dead ends: 32 [2019-09-05 12:08:17,753 INFO L226 Difference]: Without dead ends: 29 [2019-09-05 12:08:17,754 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:08:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-05 12:08:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-05 12:08:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-05 12:08:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-09-05 12:08:17,759 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-09-05 12:08:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:17,760 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-09-05 12:08:17,760 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 12:08:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-09-05 12:08:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 12:08:17,761 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:17,761 INFO L399 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:17,761 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:17,761 INFO L82 PathProgramCache]: Analyzing trace with hash 613668102, now seen corresponding path program 12 times [2019-09-05 12:08:17,761 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:17,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:17,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:17,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:17,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:17,772 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:17,772 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:17,772 INFO L223 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) [2019-09-05 12:08:17,801 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:17,895 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-05 12:08:17,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:17,898 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-05 12:08:17,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:18,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:18,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:18,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-05 12:08:18,400 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-05 12:08:18,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-05 12:08:18,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:08:18,401 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 22 states. [2019-09-05 12:08:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:18,771 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-09-05 12:08:18,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:08:18,772 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-09-05 12:08:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:18,772 INFO L225 Difference]: With dead ends: 33 [2019-09-05 12:08:18,773 INFO L226 Difference]: Without dead ends: 30 [2019-09-05 12:08:18,773 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:08:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-05 12:08:18,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-05 12:08:18,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-05 12:08:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-09-05 12:08:18,778 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-09-05 12:08:18,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:18,778 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-09-05 12:08:18,778 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-05 12:08:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-09-05 12:08:18,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-05 12:08:18,779 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:18,780 INFO L399 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:18,780 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:18,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779520, now seen corresponding path program 13 times [2019-09-05 12:08:18,780 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:18,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:18,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:18,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:18,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:18,790 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:18,790 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:18,790 INFO L223 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) [2019-09-05 12:08:18,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:18,839 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-05 12:08:18,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:19,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:19,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:19,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-05 12:08:19,139 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-05 12:08:19,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-05 12:08:19,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:08:19,140 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-09-05 12:08:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:19,499 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-09-05 12:08:19,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:08:19,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-09-05 12:08:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:19,500 INFO L225 Difference]: With dead ends: 34 [2019-09-05 12:08:19,500 INFO L226 Difference]: Without dead ends: 31 [2019-09-05 12:08:19,501 INFO L628 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 [2019-09-05 12:08:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-05 12:08:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-05 12:08:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-05 12:08:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-09-05 12:08:19,505 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-09-05 12:08:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:19,506 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-09-05 12:08:19,506 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-05 12:08:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-09-05 12:08:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-05 12:08:19,506 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:19,507 INFO L399 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:19,507 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:19,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1322527814, now seen corresponding path program 14 times [2019-09-05 12:08:19,507 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:19,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:19,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:19,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:19,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:19,517 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:19,517 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:19,518 INFO L223 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 [2019-09-05 12:08:19,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:08:19,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:08:19,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:19,577 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-05 12:08:19,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:19,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:19,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:19,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-05 12:08:19,887 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:08:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:08:19,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:08:19,888 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-09-05 12:08:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:20,268 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-05 12:08:20,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-05 12:08:20,268 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-09-05 12:08:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:20,269 INFO L225 Difference]: With dead ends: 35 [2019-09-05 12:08:20,269 INFO L226 Difference]: Without dead ends: 32 [2019-09-05 12:08:20,270 INFO L628 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 [2019-09-05 12:08:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-05 12:08:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-05 12:08:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-05 12:08:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-09-05 12:08:20,275 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-09-05 12:08:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:20,275 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-09-05 12:08:20,275 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:08:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-09-05 12:08:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 12:08:20,276 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:20,276 INFO L399 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:20,276 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1951373184, now seen corresponding path program 15 times [2019-09-05 12:08:20,277 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:20,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:20,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:20,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:20,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:20,285 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:20,286 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:20,286 INFO L223 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 [2019-09-05 12:08:20,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:08:20,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-05 12:08:20,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:20,419 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-05 12:08:20,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:20,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:20,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:20,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:08:20,755 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:08:20,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:08:20,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:08:20,756 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-09-05 12:08:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:21,176 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-09-05 12:08:21,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:08:21,177 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-09-05 12:08:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:21,177 INFO L225 Difference]: With dead ends: 36 [2019-09-05 12:08:21,177 INFO L226 Difference]: Without dead ends: 33 [2019-09-05 12:08:21,178 INFO L628 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 [2019-09-05 12:08:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-05 12:08:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-05 12:08:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-05 12:08:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-09-05 12:08:21,183 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-09-05 12:08:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:21,184 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-09-05 12:08:21,184 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:08:21,184 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-09-05 12:08:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-05 12:08:21,185 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:21,185 INFO L399 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:21,185 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:21,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:21,185 INFO L82 PathProgramCache]: Analyzing trace with hash -363089018, now seen corresponding path program 16 times [2019-09-05 12:08:21,186 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:21,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:21,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:21,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:21,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:21,194 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:21,195 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:21,195 INFO L223 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) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:21,220 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:08:21,368 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:08:21,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:21,370 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-05 12:08:21,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:21,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:21,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:21,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-05 12:08:21,773 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:08:21,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:08:21,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:08:21,774 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-09-05 12:08:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:22,224 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-09-05 12:08:22,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-05 12:08:22,225 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-09-05 12:08:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:22,226 INFO L225 Difference]: With dead ends: 37 [2019-09-05 12:08:22,226 INFO L226 Difference]: Without dead ends: 34 [2019-09-05 12:08:22,227 INFO L628 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 [2019-09-05 12:08:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-05 12:08:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-05 12:08:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-05 12:08:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-05 12:08:22,232 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-09-05 12:08:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:22,233 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-05 12:08:22,233 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:08:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-05 12:08:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-05 12:08:22,234 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:22,234 INFO L399 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:22,234 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:22,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:22,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1629079872, now seen corresponding path program 17 times [2019-09-05 12:08:22,234 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:22,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:22,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:22,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:22,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:22,244 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:22,244 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:22,244 INFO L223 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 [2019-09-05 12:08:22,266 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:08:22,310 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-05 12:08:22,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:22,312 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-05 12:08:22,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:22,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:22,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:22,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-05 12:08:22,732 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-05 12:08:22,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-05 12:08:22,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:08:22,732 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-09-05 12:08:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:23,131 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-09-05 12:08:23,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-05 12:08:23,132 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-09-05 12:08:23,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:23,132 INFO L225 Difference]: With dead ends: 38 [2019-09-05 12:08:23,133 INFO L226 Difference]: Without dead ends: 35 [2019-09-05 12:08:23,133 INFO L628 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 [2019-09-05 12:08:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-05 12:08:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-05 12:08:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-05 12:08:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-09-05 12:08:23,139 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-09-05 12:08:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:23,139 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-09-05 12:08:23,139 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-05 12:08:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-09-05 12:08:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-05 12:08:23,140 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:23,140 INFO L399 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:23,140 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1038193978, now seen corresponding path program 18 times [2019-09-05 12:08:23,141 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:23,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:23,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:23,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:23,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:23,149 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:23,150 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:23,150 INFO L223 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 [2019-09-05 12:08:23,182 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:08:23,265 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-05 12:08:23,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:23,266 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-05 12:08:23,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:23,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:23,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:23,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-05 12:08:23,697 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-05 12:08:23,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-05 12:08:23,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:08:23,698 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-09-05 12:08:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:24,297 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-09-05 12:08:24,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-05 12:08:24,297 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-09-05 12:08:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:24,297 INFO L225 Difference]: With dead ends: 39 [2019-09-05 12:08:24,297 INFO L226 Difference]: Without dead ends: 36 [2019-09-05 12:08:24,298 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:08:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-05 12:08:24,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-05 12:08:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-05 12:08:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-05 12:08:24,304 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-09-05 12:08:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:24,305 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-05 12:08:24,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-05 12:08:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-05 12:08:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-05 12:08:24,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:24,305 INFO L399 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:24,306 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:24,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2119304704, now seen corresponding path program 19 times [2019-09-05 12:08:24,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:24,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:24,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:24,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:24,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:24,318 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:24,318 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:24,319 INFO L223 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 [2019-09-05 12:08:24,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:24,398 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-05 12:08:24,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:24,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:24,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:24,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-05 12:08:24,840 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-05 12:08:24,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-05 12:08:24,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:08:24,841 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-09-05 12:08:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:25,361 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-09-05 12:08:25,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-05 12:08:25,365 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-09-05 12:08:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:25,366 INFO L225 Difference]: With dead ends: 40 [2019-09-05 12:08:25,366 INFO L226 Difference]: Without dead ends: 37 [2019-09-05 12:08:25,367 INFO L628 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 [2019-09-05 12:08:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-05 12:08:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-05 12:08:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-05 12:08:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-09-05 12:08:25,372 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-09-05 12:08:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:25,372 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-09-05 12:08:25,372 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-05 12:08:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-09-05 12:08:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-05 12:08:25,373 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:25,373 INFO L399 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:25,373 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:25,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1273998842, now seen corresponding path program 20 times [2019-09-05 12:08:25,374 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:25,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:25,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:25,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:25,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:25,382 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:25,382 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:25,382 INFO L223 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 [2019-09-05 12:08:25,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:08:25,435 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:08:25,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:25,443 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-05 12:08:25,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:25,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:25,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:25,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-05 12:08:25,894 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-05 12:08:25,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-05 12:08:25,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-09-05 12:08:25,895 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-09-05 12:08:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:26,457 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-09-05 12:08:26,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-05 12:08:26,458 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-09-05 12:08:26,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:26,458 INFO L225 Difference]: With dead ends: 41 [2019-09-05 12:08:26,459 INFO L226 Difference]: Without dead ends: 38 [2019-09-05 12:08:26,459 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:08:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-05 12:08:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-05 12:08:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-05 12:08:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-05 12:08:26,463 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-09-05 12:08:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:26,464 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-05 12:08:26,464 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-05 12:08:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-05 12:08:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-05 12:08:26,464 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:26,464 INFO L399 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:26,465 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash -839320896, now seen corresponding path program 21 times [2019-09-05 12:08:26,465 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:26,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:26,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:26,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:26,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:26,473 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:26,474 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:26,474 INFO L223 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) [2019-09-05 12:08:26,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:26,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-05 12:08:26,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:26,805 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-05 12:08:26,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:27,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:27,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:27,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-05 12:08:27,277 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-05 12:08:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-05 12:08:27,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:08:27,278 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-09-05 12:08:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:27,925 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-05 12:08:27,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-05 12:08:27,928 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-09-05 12:08:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:27,928 INFO L225 Difference]: With dead ends: 42 [2019-09-05 12:08:27,929 INFO L226 Difference]: Without dead ends: 39 [2019-09-05 12:08:27,930 INFO L628 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 [2019-09-05 12:08:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-05 12:08:27,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-05 12:08:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-05 12:08:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-09-05 12:08:27,935 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-09-05 12:08:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:27,935 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-09-05 12:08:27,935 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-05 12:08:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-09-05 12:08:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-05 12:08:27,936 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:27,936 INFO L399 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:27,936 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:27,936 INFO L82 PathProgramCache]: Analyzing trace with hash -249206458, now seen corresponding path program 22 times [2019-09-05 12:08:27,936 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:27,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:27,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:27,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:27,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:27,944 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:27,944 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:27,944 INFO L223 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 [2019-09-05 12:08:27,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:08:28,167 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:08:28,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:28,168 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-05 12:08:28,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:28,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:28,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:28,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-05 12:08:28,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-05 12:08:28,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-05 12:08:28,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:08:28,719 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-09-05 12:08:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:29,351 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-09-05 12:08:29,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-05 12:08:29,351 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-09-05 12:08:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:29,352 INFO L225 Difference]: With dead ends: 43 [2019-09-05 12:08:29,352 INFO L226 Difference]: Without dead ends: 40 [2019-09-05 12:08:29,353 INFO L628 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 [2019-09-05 12:08:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-05 12:08:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-05 12:08:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-05 12:08:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-09-05 12:08:29,369 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-09-05 12:08:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:29,370 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-09-05 12:08:29,370 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-05 12:08:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-09-05 12:08:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-05 12:08:29,371 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:29,371 INFO L399 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:29,371 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:29,372 INFO L82 PathProgramCache]: Analyzing trace with hash 864471936, now seen corresponding path program 23 times [2019-09-05 12:08:29,372 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:29,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:29,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:29,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:29,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:29,391 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:29,391 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:29,392 INFO L223 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 [2019-09-05 12:08:29,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:08:29,496 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-05 12:08:29,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:29,516 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-05 12:08:29,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:30,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:30,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:30,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-05 12:08:30,237 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-05 12:08:30,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-05 12:08:30,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-09-05 12:08:30,238 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-09-05 12:08:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:30,930 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-09-05 12:08:30,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-05 12:08:30,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-09-05 12:08:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:30,931 INFO L225 Difference]: With dead ends: 44 [2019-09-05 12:08:30,931 INFO L226 Difference]: Without dead ends: 41 [2019-09-05 12:08:30,931 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:08:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-05 12:08:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-05 12:08:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-05 12:08:30,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-05 12:08:30,936 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-09-05 12:08:30,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:30,936 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-05 12:08:30,936 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-05 12:08:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-05 12:08:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-05 12:08:30,936 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:30,936 INFO L399 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:30,937 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1028763782, now seen corresponding path program 24 times [2019-09-05 12:08:30,937 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:30,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:30,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:30,944 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:30,944 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:30,945 INFO L223 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 [2019-09-05 12:08:30,969 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:08:31,077 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-05 12:08:31,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:31,079 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-05 12:08:31,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:31,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:31,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:31,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-05 12:08:31,667 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-05 12:08:31,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-05 12:08:31,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:08:31,668 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-09-05 12:08:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:32,373 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-09-05 12:08:32,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-05 12:08:32,373 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-09-05 12:08:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:32,374 INFO L225 Difference]: With dead ends: 45 [2019-09-05 12:08:32,374 INFO L226 Difference]: Without dead ends: 42 [2019-09-05 12:08:32,375 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-05 12:08:32,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-05 12:08:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-05 12:08:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-05 12:08:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-09-05 12:08:32,380 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-09-05 12:08:32,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:32,381 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-09-05 12:08:32,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-05 12:08:32,381 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-09-05 12:08:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-05 12:08:32,381 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:32,382 INFO L399 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:32,382 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:32,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1826843712, now seen corresponding path program 25 times [2019-09-05 12:08:32,382 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:32,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:32,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:32,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:32,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:32,389 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:32,390 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:32,390 INFO L223 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) [2019-09-05 12:08:32,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:32,470 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-05 12:08:32,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:33,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:08:33,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:33,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-05 12:08:33,131 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-05 12:08:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-05 12:08:33,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-09-05 12:08:33,132 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-09-05 12:08:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:33,881 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-09-05 12:08:33,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-05 12:08:33,881 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-09-05 12:08:33,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:33,882 INFO L225 Difference]: With dead ends: 46 [2019-09-05 12:08:33,882 INFO L226 Difference]: Without dead ends: 43 [2019-09-05 12:08:33,883 INFO L628 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 [2019-09-05 12:08:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-05 12:08:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-05 12:08:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-05 12:08:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-09-05 12:08:33,889 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-09-05 12:08:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:33,889 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-09-05 12:08:33,889 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-05 12:08:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-09-05 12:08:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-05 12:08:33,890 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:33,890 INFO L399 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:33,890 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:33,891 INFO L82 PathProgramCache]: Analyzing trace with hash 797517766, now seen corresponding path program 26 times [2019-09-05 12:08:33,891 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:33,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:33,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:33,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:33,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:33,898 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:33,899 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:33,899 INFO L223 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 [2019-09-05 12:08:33,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:08:33,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:08:33,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:33,983 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-09-05 12:08:33,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:34,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:08:34,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:34,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-05 12:08:34,615 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-05 12:08:34,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-05 12:08:34,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-09-05 12:08:34,616 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-09-05 12:08:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:35,392 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-09-05 12:08:35,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-05 12:08:35,392 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-09-05 12:08:35,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:35,393 INFO L225 Difference]: With dead ends: 47 [2019-09-05 12:08:35,393 INFO L226 Difference]: Without dead ends: 44 [2019-09-05 12:08:35,394 INFO L628 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 [2019-09-05 12:08:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-05 12:08:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-05 12:08:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-05 12:08:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-05 12:08:35,399 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-09-05 12:08:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:35,400 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-05 12:08:35,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-05 12:08:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-05 12:08:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-05 12:08:35,400 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:35,400 INFO L399 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:35,400 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:35,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:35,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1046815488, now seen corresponding path program 27 times [2019-09-05 12:08:35,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:35,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:35,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:35,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:35,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:35,409 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:35,409 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:35,409 INFO L223 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 [2019-09-05 12:08:35,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:08:35,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-05 12:08:35,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:35,997 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-09-05 12:08:35,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:36,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:36,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:36,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-05 12:08:36,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-05 12:08:36,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-05 12:08:36,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:08:36,679 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-09-05 12:08:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:37,513 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-09-05 12:08:37,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-05 12:08:37,513 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-09-05 12:08:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:37,514 INFO L225 Difference]: With dead ends: 48 [2019-09-05 12:08:37,514 INFO L226 Difference]: Without dead ends: 45 [2019-09-05 12:08:37,515 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:08:37,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-05 12:08:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-05 12:08:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-05 12:08:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-09-05 12:08:37,520 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-09-05 12:08:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:37,520 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-09-05 12:08:37,520 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-05 12:08:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-09-05 12:08:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-05 12:08:37,521 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:37,521 INFO L399 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:37,521 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:37,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1908395782, now seen corresponding path program 28 times [2019-09-05 12:08:37,522 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:37,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:37,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:37,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:37,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:37,529 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:37,529 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:37,529 INFO L223 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 [2019-09-05 12:08:37,553 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:08:37,812 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:08:37,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:37,814 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-05 12:08:37,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:38,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:38,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:38,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-05 12:08:38,561 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-05 12:08:38,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-05 12:08:38,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:08:38,562 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-09-05 12:08:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:39,472 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-05 12:08:39,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-05 12:08:39,472 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-09-05 12:08:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:39,473 INFO L225 Difference]: With dead ends: 49 [2019-09-05 12:08:39,473 INFO L226 Difference]: Without dead ends: 46 [2019-09-05 12:08:39,473 INFO L628 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 [2019-09-05 12:08:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-05 12:08:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-05 12:08:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-05 12:08:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-09-05 12:08:39,477 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-09-05 12:08:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:39,477 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-09-05 12:08:39,477 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-05 12:08:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-09-05 12:08:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-05 12:08:39,478 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:39,478 INFO L399 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:39,478 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:39,478 INFO L82 PathProgramCache]: Analyzing trace with hash -969335360, now seen corresponding path program 29 times [2019-09-05 12:08:39,478 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:39,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:39,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:39,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:39,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:39,486 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:39,486 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:39,486 INFO L223 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) [2019-09-05 12:08:39,516 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:39,599 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-09-05 12:08:39,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:39,607 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-09-05 12:08:39,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:40,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:40,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:40,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-09-05 12:08:40,368 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-05 12:08:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-05 12:08:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:08:40,369 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-09-05 12:08:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:41,321 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-09-05 12:08:41,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-05 12:08:41,321 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-09-05 12:08:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:41,322 INFO L225 Difference]: With dead ends: 50 [2019-09-05 12:08:41,322 INFO L226 Difference]: Without dead ends: 47 [2019-09-05 12:08:41,323 INFO L628 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 [2019-09-05 12:08:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-05 12:08:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-05 12:08:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-05 12:08:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-09-05 12:08:41,328 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-09-05 12:08:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:41,329 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-09-05 12:08:41,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-05 12:08:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-09-05 12:08:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-05 12:08:41,329 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:41,330 INFO L399 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:41,330 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:41,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:41,330 INFO L82 PathProgramCache]: Analyzing trace with hash 15312454, now seen corresponding path program 30 times [2019-09-05 12:08:41,330 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:41,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:41,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:41,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:41,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:41,338 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:41,339 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:41,339 INFO L223 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 [2019-09-05 12:08:41,360 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:08:41,605 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-05 12:08:41,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:41,609 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-09-05 12:08:41,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:42,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:42,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:42,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-09-05 12:08:42,350 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-05 12:08:42,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-05 12:08:42,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:08:42,352 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-09-05 12:08:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:43,331 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-09-05 12:08:43,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-05 12:08:43,332 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-09-05 12:08:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:43,332 INFO L225 Difference]: With dead ends: 51 [2019-09-05 12:08:43,333 INFO L226 Difference]: Without dead ends: 48 [2019-09-05 12:08:43,334 INFO L628 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 [2019-09-05 12:08:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-05 12:08:43,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-05 12:08:43,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-05 12:08:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-05 12:08:43,339 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-09-05 12:08:43,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:43,339 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-05 12:08:43,339 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-05 12:08:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-05 12:08:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-05 12:08:43,340 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:43,340 INFO L399 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:43,340 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:43,340 INFO L82 PathProgramCache]: Analyzing trace with hash 474623616, now seen corresponding path program 31 times [2019-09-05 12:08:43,341 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:43,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:43,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:43,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:43,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:43,348 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:43,348 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:43,348 INFO L223 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 [2019-09-05 12:08:43,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:43,422 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-09-05 12:08:43,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:44,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:44,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:44,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-05 12:08:44,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-05 12:08:44,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-05 12:08:44,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-09-05 12:08:44,225 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-09-05 12:08:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:45,265 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-09-05 12:08:45,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-05 12:08:45,266 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-09-05 12:08:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:45,266 INFO L225 Difference]: With dead ends: 52 [2019-09-05 12:08:45,267 INFO L226 Difference]: Without dead ends: 49 [2019-09-05 12:08:45,268 INFO L628 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 [2019-09-05 12:08:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-05 12:08:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-09-05 12:08:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-05 12:08:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-09-05 12:08:45,272 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-09-05 12:08:45,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:45,272 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-09-05 12:08:45,272 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-05 12:08:45,272 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-09-05 12:08:45,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-05 12:08:45,273 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:45,273 INFO L399 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:45,273 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:45,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1828367750, now seen corresponding path program 32 times [2019-09-05 12:08:45,274 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:45,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:45,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:45,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:45,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:45,281 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:45,282 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:45,282 INFO L223 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 [2019-09-05 12:08:45,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:08:45,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:08:45,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:45,365 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-09-05 12:08:45,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:46,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:46,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:46,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-09-05 12:08:46,259 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-05 12:08:46,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-05 12:08:46,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-09-05 12:08:46,261 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-09-05 12:08:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:47,578 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-09-05 12:08:47,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-05 12:08:47,578 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-09-05 12:08:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:47,578 INFO L225 Difference]: With dead ends: 53 [2019-09-05 12:08:47,578 INFO L226 Difference]: Without dead ends: 50 [2019-09-05 12:08:47,579 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-09-05 12:08:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-05 12:08:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-05 12:08:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-05 12:08:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-09-05 12:08:47,583 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-09-05 12:08:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:47,583 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-09-05 12:08:47,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-05 12:08:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-09-05 12:08:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-05 12:08:47,584 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:47,584 INFO L399 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:47,584 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash 844762944, now seen corresponding path program 33 times [2019-09-05 12:08:47,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:47,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:47,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:47,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:47,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:47,592 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:47,592 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:47,592 INFO L223 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 [2019-09-05 12:08:47,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:08:48,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-05 12:08:48,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:48,530 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-05 12:08:48,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:49,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:49,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:49,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-05 12:08:49,392 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-05 12:08:49,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-05 12:08:49,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-09-05 12:08:49,393 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-09-05 12:08:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:50,539 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-09-05 12:08:50,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-05 12:08:50,540 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-09-05 12:08:50,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:50,540 INFO L225 Difference]: With dead ends: 54 [2019-09-05 12:08:50,541 INFO L226 Difference]: Without dead ends: 51 [2019-09-05 12:08:50,542 INFO L628 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 [2019-09-05 12:08:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-05 12:08:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-05 12:08:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-05 12:08:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-09-05 12:08:50,547 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-09-05 12:08:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:50,548 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-09-05 12:08:50,548 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-05 12:08:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-09-05 12:08:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-05 12:08:50,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:50,548 INFO L399 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:50,548 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:50,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:50,549 INFO L82 PathProgramCache]: Analyzing trace with hash 417785030, now seen corresponding path program 34 times [2019-09-05 12:08:50,549 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:50,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:50,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:50,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:50,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:50,556 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:50,556 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:50,557 INFO L223 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 [2019-09-05 12:08:50,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:08:50,901 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:08:50,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:50,903 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-09-05 12:08:50,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:51,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:51,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:51,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-09-05 12:08:51,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-05 12:08:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-05 12:08:51,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-09-05 12:08:51,793 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-09-05 12:08:52,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:52,994 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-09-05 12:08:52,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-05 12:08:52,995 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-09-05 12:08:52,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:52,996 INFO L225 Difference]: With dead ends: 55 [2019-09-05 12:08:52,997 INFO L226 Difference]: Without dead ends: 52 [2019-09-05 12:08:52,998 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-09-05 12:08:52,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-05 12:08:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-05 12:08:53,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-05 12:08:53,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-05 12:08:53,003 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-09-05 12:08:53,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:53,003 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-05 12:08:53,003 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-05 12:08:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-05 12:08:53,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-05 12:08:53,003 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:53,003 INFO L399 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:53,004 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:53,004 INFO L82 PathProgramCache]: Analyzing trace with hash 66371584, now seen corresponding path program 35 times [2019-09-05 12:08:53,004 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:53,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:53,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:53,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:53,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:53,011 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:53,011 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:53,012 INFO L223 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) [2019-09-05 12:08:53,036 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:08:53,149 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-05 12:08:53,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:53,157 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-09-05 12:08:53,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:54,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:54,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:54,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-09-05 12:08:54,181 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-05 12:08:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-05 12:08:54,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-09-05 12:08:54,182 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-09-05 12:08:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:55,439 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-09-05 12:08:55,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-05 12:08:55,440 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-09-05 12:08:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:55,440 INFO L225 Difference]: With dead ends: 56 [2019-09-05 12:08:55,440 INFO L226 Difference]: Without dead ends: 53 [2019-09-05 12:08:55,441 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-09-05 12:08:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-05 12:08:55,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-05 12:08:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-05 12:08:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-09-05 12:08:55,447 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-09-05 12:08:55,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:55,447 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-09-05 12:08:55,447 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-05 12:08:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-09-05 12:08:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-05 12:08:55,448 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:55,448 INFO L399 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:55,448 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:55,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2057456646, now seen corresponding path program 36 times [2019-09-05 12:08:55,448 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:55,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:55,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:55,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:55,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:55,457 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:55,457 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:55,457 INFO L223 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 [2019-09-05 12:08:55,467 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:08:55,916 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-05 12:08:55,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:55,924 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-09-05 12:08:55,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:56,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:56,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:56,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-09-05 12:08:56,938 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-05 12:08:56,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-05 12:08:56,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-09-05 12:08:56,940 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-09-05 12:08:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:58,246 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-09-05 12:08:58,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-05 12:08:58,246 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-09-05 12:08:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:58,247 INFO L225 Difference]: With dead ends: 57 [2019-09-05 12:08:58,247 INFO L226 Difference]: Without dead ends: 54 [2019-09-05 12:08:58,249 INFO L628 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 [2019-09-05 12:08:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-05 12:08:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-05 12:08:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-05 12:08:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-09-05 12:08:58,254 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-09-05 12:08:58,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:58,255 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-09-05 12:08:58,255 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-05 12:08:58,255 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-09-05 12:08:58,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-05 12:08:58,255 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:58,255 INFO L399 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:58,256 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:58,256 INFO L82 PathProgramCache]: Analyzing trace with hash -643415872, now seen corresponding path program 37 times [2019-09-05 12:08:58,256 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:58,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:58,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:58,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:58,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:58,263 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:58,264 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:58,264 INFO L223 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 [2019-09-05 12:08:58,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:58,348 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-05 12:08:58,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:59,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:08:59,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:59,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-09-05 12:08:59,375 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-05 12:08:59,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-05 12:08:59,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-09-05 12:08:59,375 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-09-05 12:09:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:00,726 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-09-05 12:09:00,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-05 12:09:00,727 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-09-05 12:09:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:00,728 INFO L225 Difference]: With dead ends: 58 [2019-09-05 12:09:00,728 INFO L226 Difference]: Without dead ends: 55 [2019-09-05 12:09:00,729 INFO L628 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 [2019-09-05 12:09:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-05 12:09:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-09-05 12:09:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-05 12:09:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-09-05 12:09:00,734 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-09-05 12:09:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:00,734 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-09-05 12:09:00,734 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-05 12:09:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-09-05 12:09:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-05 12:09:00,735 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:00,735 INFO L399 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:00,735 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:00,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1528881990, now seen corresponding path program 38 times [2019-09-05 12:09:00,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:00,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:00,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:00,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:09:00,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:00,741 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:00,741 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:00,741 INFO L223 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 [2019-09-05 12:09:00,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:09:00,855 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:09:00,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:00,859 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-09-05 12:09:00,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:01,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:01,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:01,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-09-05 12:09:01,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-05 12:09:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-05 12:09:01,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-09-05 12:09:01,981 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-09-05 12:09:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:03,440 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-09-05 12:09:03,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-05 12:09:03,440 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-09-05 12:09:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:03,441 INFO L225 Difference]: With dead ends: 59 [2019-09-05 12:09:03,441 INFO L226 Difference]: Without dead ends: 56 [2019-09-05 12:09:03,442 INFO L628 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 [2019-09-05 12:09:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-05 12:09:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-05 12:09:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-05 12:09:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-09-05 12:09:03,448 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-09-05 12:09:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:03,448 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-09-05 12:09:03,448 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-05 12:09:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-09-05 12:09:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-05 12:09:03,449 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:03,449 INFO L399 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:03,449 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:03,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash 150638976, now seen corresponding path program 39 times [2019-09-05 12:09:03,449 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:03,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:03,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:03,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:03,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:03,457 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:03,457 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:03,457 INFO L223 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) [2019-09-05 12:09:03,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:09:05,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-05 12:09:05,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:05,338 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-09-05 12:09:05,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:06,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:06,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:06,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-09-05 12:09:06,474 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-05 12:09:06,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-05 12:09:06,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-09-05 12:09:06,475 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-09-05 12:09:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:07,986 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-09-05 12:09:07,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-05 12:09:07,986 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-09-05 12:09:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:07,987 INFO L225 Difference]: With dead ends: 60 [2019-09-05 12:09:07,987 INFO L226 Difference]: Without dead ends: 57 [2019-09-05 12:09:07,987 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-09-05 12:09:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-05 12:09:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-05 12:09:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-05 12:09:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-09-05 12:09:07,991 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-09-05 12:09:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:07,992 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-09-05 12:09:07,992 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-05 12:09:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-09-05 12:09:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-05 12:09:07,992 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:07,992 INFO L399 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:07,992 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:07,993 INFO L82 PathProgramCache]: Analyzing trace with hash 374778502, now seen corresponding path program 40 times [2019-09-05 12:09:07,993 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:07,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:07,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:07,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:07,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:08,001 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:08,001 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:08,001 INFO L223 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 [2019-09-05 12:09:08,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:09:08,451 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:09:08,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:08,455 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-05 12:09:08,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:09,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:09,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:09,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-09-05 12:09:09,723 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-05 12:09:09,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-05 12:09:09,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-09-05 12:09:09,724 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-09-05 12:09:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:11,284 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-09-05 12:09:11,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-05 12:09:11,284 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-09-05 12:09:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:11,285 INFO L225 Difference]: With dead ends: 61 [2019-09-05 12:09:11,285 INFO L226 Difference]: Without dead ends: 58 [2019-09-05 12:09:11,286 INFO L628 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 [2019-09-05 12:09:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-05 12:09:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-05 12:09:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-05 12:09:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-09-05 12:09:11,291 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-09-05 12:09:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:11,291 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-09-05 12:09:11,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-05 12:09:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-09-05 12:09:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-05 12:09:11,292 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:11,292 INFO L399 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:11,292 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:11,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1266830784, now seen corresponding path program 41 times [2019-09-05 12:09:11,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:11,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:11,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:11,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:11,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:11,300 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:11,300 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:11,301 INFO L223 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 [2019-09-05 12:09:11,330 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:09:11,489 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-09-05 12:09:11,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:11,496 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-09-05 12:09:11,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:12,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:12,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:12,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-09-05 12:09:12,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-05 12:09:12,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-05 12:09:12,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-09-05 12:09:12,751 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-09-05 12:09:14,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:14,380 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-09-05 12:09:14,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-05 12:09:14,380 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-09-05 12:09:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:14,381 INFO L225 Difference]: With dead ends: 62 [2019-09-05 12:09:14,381 INFO L226 Difference]: Without dead ends: 59 [2019-09-05 12:09:14,382 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-09-05 12:09:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-05 12:09:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-05 12:09:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-05 12:09:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-09-05 12:09:14,388 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-09-05 12:09:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:14,388 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-09-05 12:09:14,388 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-05 12:09:14,388 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-09-05 12:09:14,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-05 12:09:14,389 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:14,389 INFO L399 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:14,389 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash -617111098, now seen corresponding path program 42 times [2019-09-05 12:09:14,389 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:14,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:14,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:14,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:14,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:14,396 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:14,397 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:14,397 INFO L223 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 [2019-09-05 12:09:14,409 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:09:14,964 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-09-05 12:09:14,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:14,968 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-09-05 12:09:14,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:16,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:16,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:16,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-09-05 12:09:16,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-05 12:09:16,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-05 12:09:16,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-09-05 12:09:16,303 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-09-05 12:09:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:18,024 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-09-05 12:09:18,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-05 12:09:18,025 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-09-05 12:09:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:18,026 INFO L225 Difference]: With dead ends: 63 [2019-09-05 12:09:18,026 INFO L226 Difference]: Without dead ends: 60 [2019-09-05 12:09:18,027 INFO L628 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 [2019-09-05 12:09:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-05 12:09:18,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-05 12:09:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-05 12:09:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-05 12:09:18,033 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-09-05 12:09:18,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:18,033 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-05 12:09:18,033 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-05 12:09:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-05 12:09:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-05 12:09:18,034 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:18,034 INFO L399 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:18,034 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:18,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1950637312, now seen corresponding path program 43 times [2019-09-05 12:09:18,034 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:18,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:18,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:18,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:18,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:18,041 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:18,041 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:18,041 INFO L223 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 [2019-09-05 12:09:18,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:09:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:09:18,133 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-05 12:09:18,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:19,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:19,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:19,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-09-05 12:09:19,460 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-05 12:09:19,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-05 12:09:19,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-09-05 12:09:19,461 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-09-05 12:09:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:21,238 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-09-05 12:09:21,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-05 12:09:21,238 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-09-05 12:09:21,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:21,238 INFO L225 Difference]: With dead ends: 64 [2019-09-05 12:09:21,239 INFO L226 Difference]: Without dead ends: 61 [2019-09-05 12:09:21,239 INFO L628 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 [2019-09-05 12:09:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-05 12:09:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-05 12:09:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-05 12:09:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-09-05 12:09:21,245 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-09-05 12:09:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:21,245 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-09-05 12:09:21,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-05 12:09:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-09-05 12:09:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-05 12:09:21,246 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:21,246 INFO L399 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:21,247 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:21,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:21,247 INFO L82 PathProgramCache]: Analyzing trace with hash -340276986, now seen corresponding path program 44 times [2019-09-05 12:09:21,247 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:21,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:21,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:21,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:09:21,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:21,255 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:21,255 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:21,255 INFO L223 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) [2019-09-05 12:09:21,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:09:21,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:09:21,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:21,364 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-09-05 12:09:21,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:22,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:22,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:22,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-09-05 12:09:22,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-05 12:09:22,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-05 12:09:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-09-05 12:09:22,737 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-09-05 12:09:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:24,593 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-09-05 12:09:24,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-05 12:09:24,593 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-09-05 12:09:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:24,594 INFO L225 Difference]: With dead ends: 65 [2019-09-05 12:09:24,594 INFO L226 Difference]: Without dead ends: 62 [2019-09-05 12:09:24,595 INFO L628 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 [2019-09-05 12:09:24,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-05 12:09:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-09-05 12:09:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-05 12:09:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-09-05 12:09:24,601 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-09-05 12:09:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:24,602 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-09-05 12:09:24,602 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-05 12:09:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-09-05 12:09:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-05 12:09:24,602 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:24,602 INFO L399 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:24,603 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:24,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:24,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1958714432, now seen corresponding path program 45 times [2019-09-05 12:09:24,603 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:24,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:24,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:24,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:24,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:24,611 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:24,611 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:24,611 INFO L223 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 [2019-09-05 12:09:24,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:09:27,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-05 12:09:27,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:27,260 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-09-05 12:09:27,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:28,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:28,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:28,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-09-05 12:09:28,660 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-05 12:09:28,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-05 12:09:28,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-09-05 12:09:28,661 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-09-05 12:09:30,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:30,552 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-09-05 12:09:30,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-05 12:09:30,553 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-09-05 12:09:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:30,554 INFO L225 Difference]: With dead ends: 66 [2019-09-05 12:09:30,554 INFO L226 Difference]: Without dead ends: 63 [2019-09-05 12:09:30,554 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-09-05 12:09:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-05 12:09:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-05 12:09:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-05 12:09:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-09-05 12:09:30,561 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-09-05 12:09:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:30,561 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-09-05 12:09:30,561 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-05 12:09:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-09-05 12:09:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-05 12:09:30,562 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:30,562 INFO L399 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:30,562 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:30,563 INFO L82 PathProgramCache]: Analyzing trace with hash -590667706, now seen corresponding path program 46 times [2019-09-05 12:09:30,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:30,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:30,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:30,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:30,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:30,571 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:30,571 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:30,571 INFO L223 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 [2019-09-05 12:09:30,584 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:09:31,290 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:09:31,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:31,294 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-05 12:09:31,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:32,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:32,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:32,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-09-05 12:09:32,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-05 12:09:32,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-05 12:09:32,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-09-05 12:09:32,715 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-09-05 12:09:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:34,670 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-09-05 12:09:34,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-05 12:09:34,670 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-09-05 12:09:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:34,671 INFO L225 Difference]: With dead ends: 67 [2019-09-05 12:09:34,671 INFO L226 Difference]: Without dead ends: 64 [2019-09-05 12:09:34,671 INFO L628 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 [2019-09-05 12:09:34,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-05 12:09:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-05 12:09:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-05 12:09:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-09-05 12:09:34,676 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-09-05 12:09:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:34,676 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-09-05 12:09:34,676 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-05 12:09:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-09-05 12:09:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-05 12:09:34,677 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:34,677 INFO L399 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:34,677 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:34,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1130892160, now seen corresponding path program 47 times [2019-09-05 12:09:34,677 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:34,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:34,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:34,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:34,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:34,686 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:34,686 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:34,686 INFO L223 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 [2019-09-05 12:09:34,712 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:09:34,900 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-05 12:09:34,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:34,907 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-09-05 12:09:34,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:36,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:36,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:36,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-09-05 12:09:36,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-05 12:09:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-05 12:09:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-09-05 12:09:36,425 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-09-05 12:09:38,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:38,470 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-09-05 12:09:38,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-05 12:09:38,470 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-09-05 12:09:38,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:38,471 INFO L225 Difference]: With dead ends: 68 [2019-09-05 12:09:38,472 INFO L226 Difference]: Without dead ends: 65 [2019-09-05 12:09:38,472 INFO L628 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 [2019-09-05 12:09:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-05 12:09:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-05 12:09:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-05 12:09:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-09-05 12:09:38,479 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-09-05 12:09:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:38,479 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-09-05 12:09:38,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-05 12:09:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-09-05 12:09:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-05 12:09:38,480 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:38,480 INFO L399 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:38,480 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash -697981050, now seen corresponding path program 48 times [2019-09-05 12:09:38,481 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:38,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:38,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:38,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:38,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:38,489 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:38,489 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:38,489 INFO L223 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 [2019-09-05 12:09:38,524 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:09:39,145 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-05 12:09:39,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:39,151 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-05 12:09:39,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:40,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:40,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:40,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-09-05 12:09:40,705 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-05 12:09:40,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-05 12:09:40,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-09-05 12:09:40,705 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-09-05 12:09:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:42,852 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-09-05 12:09:42,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-05 12:09:42,852 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-09-05 12:09:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:42,853 INFO L225 Difference]: With dead ends: 69 [2019-09-05 12:09:42,853 INFO L226 Difference]: Without dead ends: 66 [2019-09-05 12:09:42,853 INFO L628 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 [2019-09-05 12:09:42,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-05 12:09:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-05 12:09:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-05 12:09:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-09-05 12:09:42,860 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-09-05 12:09:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:42,861 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-09-05 12:09:42,861 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-05 12:09:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-09-05 12:09:42,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-05 12:09:42,861 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:42,862 INFO L399 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:42,862 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:42,862 INFO L82 PathProgramCache]: Analyzing trace with hash -162638528, now seen corresponding path program 49 times [2019-09-05 12:09:42,862 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:42,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:42,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:42,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:42,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:42,870 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:42,871 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:42,871 INFO L223 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 [2019-09-05 12:09:42,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:09:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:09:42,997 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-09-05 12:09:42,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:44,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Exception during sending of exit command (exit): Stream closed [2019-09-05 12:09:44,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:44,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-09-05 12:09:44,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-05 12:09:44,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-05 12:09:44,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-09-05 12:09:44,571 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-09-05 12:09:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:46,750 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-09-05 12:09:46,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-05 12:09:46,750 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-09-05 12:09:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:46,751 INFO L225 Difference]: With dead ends: 70 [2019-09-05 12:09:46,751 INFO L226 Difference]: Without dead ends: 67 [2019-09-05 12:09:46,752 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2019-09-05 12:09:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-05 12:09:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-09-05 12:09:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-05 12:09:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-09-05 12:09:46,760 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-09-05 12:09:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:46,760 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-09-05 12:09:46,761 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-05 12:09:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-09-05 12:09:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-05 12:09:46,761 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:46,761 INFO L399 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:46,761 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:46,762 INFO L82 PathProgramCache]: Analyzing trace with hash -746889530, now seen corresponding path program 50 times [2019-09-05 12:09:46,762 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:46,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:46,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:46,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:09:46,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:46,770 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:46,770 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:46,770 INFO L223 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 [2019-09-05 12:09:46,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:09:46,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:09:46,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:46,900 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-09-05 12:09:46,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:48,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:48,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:48,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-09-05 12:09:48,536 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-05 12:09:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-05 12:09:48,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-09-05 12:09:48,537 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-09-05 12:09:50,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:50,816 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-09-05 12:09:50,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-05 12:09:50,816 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-09-05 12:09:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:50,817 INFO L225 Difference]: With dead ends: 71 [2019-09-05 12:09:50,818 INFO L226 Difference]: Without dead ends: 68 [2019-09-05 12:09:50,818 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-09-05 12:09:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-05 12:09:50,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-05 12:09:50,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-05 12:09:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-05 12:09:50,824 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-09-05 12:09:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:50,824 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-05 12:09:50,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-05 12:09:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-05 12:09:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-05 12:09:50,825 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:50,825 INFO L399 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:50,825 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1678801408, now seen corresponding path program 51 times [2019-09-05 12:09:50,826 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:50,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:50,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:50,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:50,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:50,834 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:50,834 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:50,834 INFO L223 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 [2019-09-05 12:09:50,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:09:55,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-09-05 12:09:55,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:55,193 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-09-05 12:09:55,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:57,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:09:57,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:57,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-09-05 12:09:57,373 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-05 12:09:57,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-05 12:09:57,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-09-05 12:09:57,374 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-09-05 12:09:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:59,726 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-09-05 12:09:59,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-05 12:09:59,727 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-09-05 12:09:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:59,727 INFO L225 Difference]: With dead ends: 72 [2019-09-05 12:09:59,727 INFO L226 Difference]: Without dead ends: 69 [2019-09-05 12:09:59,728 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-09-05 12:09:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-05 12:09:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-05 12:09:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-05 12:09:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-09-05 12:09:59,733 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-09-05 12:09:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:59,734 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-09-05 12:09:59,734 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-05 12:09:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-09-05 12:09:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-05 12:09:59,734 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:59,734 INFO L399 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:59,735 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash -503298554, now seen corresponding path program 52 times [2019-09-05 12:09:59,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:59,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:59,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:59,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:59,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:59,742 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:59,743 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:59,743 INFO L223 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 [2019-09-05 12:09:59,755 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:10:00,350 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:10:00,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:00,354 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-05 12:10:00,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:02,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:02,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:02,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-09-05 12:10:02,167 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-05 12:10:02,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-05 12:10:02,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-09-05 12:10:02,167 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-09-05 12:10:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:04,725 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-09-05 12:10:04,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-05 12:10:04,725 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-09-05 12:10:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:04,726 INFO L225 Difference]: With dead ends: 73 [2019-09-05 12:10:04,727 INFO L226 Difference]: Without dead ends: 70 [2019-09-05 12:10:04,727 INFO L628 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 [2019-09-05 12:10:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-05 12:10:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-09-05 12:10:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-05 12:10:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-09-05 12:10:04,735 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-09-05 12:10:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:04,735 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-09-05 12:10:04,735 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-05 12:10:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-09-05 12:10:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-05 12:10:04,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:04,736 INFO L399 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:04,736 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:04,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:04,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1577551552, now seen corresponding path program 53 times [2019-09-05 12:10:04,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:04,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:04,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:04,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:04,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:04,744 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:04,745 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:04,745 INFO L223 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 [2019-09-05 12:10:04,778 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:10:04,942 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-05 12:10:04,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:04,949 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-09-05 12:10:04,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:06,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:06,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:06,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-09-05 12:10:06,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-05 12:10:06,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-05 12:10:06,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-09-05 12:10:06,738 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-09-05 12:10:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:09,239 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-09-05 12:10:09,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-05 12:10:09,239 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-09-05 12:10:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:09,240 INFO L225 Difference]: With dead ends: 74 [2019-09-05 12:10:09,240 INFO L226 Difference]: Without dead ends: 71 [2019-09-05 12:10:09,241 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2019-09-05 12:10:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-05 12:10:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-05 12:10:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-05 12:10:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-09-05 12:10:09,248 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-09-05 12:10:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:09,249 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-09-05 12:10:09,249 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-05 12:10:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-09-05 12:10:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-05 12:10:09,249 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:09,249 INFO L399 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:09,249 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1659395398, now seen corresponding path program 54 times [2019-09-05 12:10:09,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:09,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:09,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:09,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:09,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:09,257 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:09,257 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:09,257 INFO L223 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 [2019-09-05 12:10:09,271 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:10:11,387 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-05 12:10:11,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:11,394 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-09-05 12:10:11,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:13,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:13,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:13,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-09-05 12:10:13,305 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-05 12:10:13,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-05 12:10:13,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-09-05 12:10:13,305 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-09-05 12:10:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:15,947 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-09-05 12:10:15,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-05 12:10:15,947 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-09-05 12:10:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:15,948 INFO L225 Difference]: With dead ends: 75 [2019-09-05 12:10:15,948 INFO L226 Difference]: Without dead ends: 72 [2019-09-05 12:10:15,949 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2019-09-05 12:10:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-05 12:10:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-05 12:10:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-05 12:10:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-09-05 12:10:15,956 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-09-05 12:10:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:15,956 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-09-05 12:10:15,956 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-05 12:10:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-09-05 12:10:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-05 12:10:15,957 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:15,957 INFO L399 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:15,957 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:15,958 INFO L82 PathProgramCache]: Analyzing trace with hash -98412672, now seen corresponding path program 55 times [2019-09-05 12:10:15,958 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:15,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:15,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:15,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:15,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:15,966 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:15,966 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:15,966 INFO L223 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 [2019-09-05 12:10:15,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:10:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:10:16,131 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-09-05 12:10:16,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:18,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:18,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:18,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-09-05 12:10:18,078 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-05 12:10:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-05 12:10:18,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-09-05 12:10:18,078 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-09-05 12:10:20,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:20,770 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-09-05 12:10:20,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-05 12:10:20,771 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-09-05 12:10:20,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:20,772 INFO L225 Difference]: With dead ends: 76 [2019-09-05 12:10:20,772 INFO L226 Difference]: Without dead ends: 73 [2019-09-05 12:10:20,772 INFO L628 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 [2019-09-05 12:10:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-05 12:10:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-05 12:10:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-05 12:10:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-09-05 12:10:20,778 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-09-05 12:10:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:20,779 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-09-05 12:10:20,779 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-05 12:10:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-09-05 12:10:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-05 12:10:20,779 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:20,779 INFO L399 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:20,780 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:20,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1244112006, now seen corresponding path program 56 times [2019-09-05 12:10:20,780 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:20,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:20,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:20,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:10:20,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:20,788 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:20,788 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:20,788 INFO L223 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) [2019-09-05 12:10:20,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:10:20,943 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:10:20,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:20,947 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-09-05 12:10:20,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:22,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:23,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:23,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-09-05 12:10:23,014 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-05 12:10:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-05 12:10:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-09-05 12:10:23,015 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-09-05 12:10:25,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:25,766 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-09-05 12:10:25,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-09-05 12:10:25,767 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-09-05 12:10:25,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:25,769 INFO L225 Difference]: With dead ends: 77 [2019-09-05 12:10:25,769 INFO L226 Difference]: Without dead ends: 74 [2019-09-05 12:10:25,769 INFO L628 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 [2019-09-05 12:10:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-05 12:10:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-05 12:10:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-05 12:10:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-09-05 12:10:25,777 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-09-05 12:10:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:25,777 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-09-05 12:10:25,777 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-05 12:10:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-09-05 12:10:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-05 12:10:25,778 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:25,778 INFO L399 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:25,778 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:25,779 INFO L82 PathProgramCache]: Analyzing trace with hash -87295936, now seen corresponding path program 57 times [2019-09-05 12:10:25,779 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:25,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:25,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:25,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:25,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:25,791 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:25,792 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:25,792 INFO L223 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) [2019-09-05 12:10:25,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:10:30,566 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-05 12:10:30,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:30,576 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-09-05 12:10:30,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:32,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:32,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:32,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-09-05 12:10:32,686 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-05 12:10:32,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-05 12:10:32,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-09-05 12:10:32,687 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-09-05 12:10:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:35,552 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-09-05 12:10:35,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-05 12:10:35,553 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-09-05 12:10:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:35,553 INFO L225 Difference]: With dead ends: 78 [2019-09-05 12:10:35,553 INFO L226 Difference]: Without dead ends: 75 [2019-09-05 12:10:35,554 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-09-05 12:10:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-05 12:10:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-05 12:10:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-05 12:10:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-09-05 12:10:35,560 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-09-05 12:10:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:35,560 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-09-05 12:10:35,560 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-05 12:10:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-09-05 12:10:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-05 12:10:35,561 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:35,561 INFO L399 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:35,561 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:35,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:35,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1588730822, now seen corresponding path program 58 times [2019-09-05 12:10:35,561 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:35,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:35,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:35,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:35,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:35,568 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:35,568 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:35,568 INFO L223 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 [2019-09-05 12:10:35,577 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:10:36,302 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:10:36,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:36,307 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-05 12:10:36,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:38,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:38,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:38,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-09-05 12:10:38,410 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-05 12:10:38,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-05 12:10:38,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-09-05 12:10:38,411 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-09-05 12:10:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:41,326 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-09-05 12:10:41,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-05 12:10:41,326 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-09-05 12:10:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:41,327 INFO L225 Difference]: With dead ends: 79 [2019-09-05 12:10:41,327 INFO L226 Difference]: Without dead ends: 76 [2019-09-05 12:10:41,328 INFO L628 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 [2019-09-05 12:10:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-05 12:10:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-05 12:10:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-05 12:10:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-05 12:10:41,336 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-09-05 12:10:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:41,336 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-05 12:10:41,336 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-05 12:10:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-05 12:10:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-05 12:10:41,337 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:41,337 INFO L399 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:41,337 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2005952768, now seen corresponding path program 59 times [2019-09-05 12:10:41,337 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:41,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:41,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:41,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:41,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:41,345 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:41,345 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:41,346 INFO L223 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) [2019-09-05 12:10:41,375 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:10:41,657 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-05 12:10:41,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:41,664 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-09-05 12:10:41,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:43,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:43,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:43,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-09-05 12:10:43,843 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-05 12:10:43,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-05 12:10:43,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-09-05 12:10:43,843 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-09-05 12:10:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:46,880 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-09-05 12:10:46,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-05 12:10:46,881 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-09-05 12:10:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:46,881 INFO L225 Difference]: With dead ends: 80 [2019-09-05 12:10:46,881 INFO L226 Difference]: Without dead ends: 77 [2019-09-05 12:10:46,882 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-09-05 12:10:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-05 12:10:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-05 12:10:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-05 12:10:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-09-05 12:10:46,890 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-09-05 12:10:46,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:46,890 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-09-05 12:10:46,891 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-05 12:10:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-09-05 12:10:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-05 12:10:46,891 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:46,891 INFO L399 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:46,892 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:46,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2054931206, now seen corresponding path program 60 times [2019-09-05 12:10:46,892 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:46,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:46,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:46,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:46,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:46,900 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:46,900 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:46,900 INFO L223 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 [2019-09-05 12:10:46,925 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:10:49,316 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-05 12:10:49,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:49,325 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-09-05 12:10:49,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:51,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Exception during sending of exit command (exit): Stream closed [2019-09-05 12:10:51,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:51,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-09-05 12:10:51,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-05 12:10:51,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-05 12:10:51,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-09-05 12:10:51,534 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-09-05 12:10:54,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:54,702 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-09-05 12:10:54,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-05 12:10:54,702 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-09-05 12:10:54,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:54,704 INFO L225 Difference]: With dead ends: 81 [2019-09-05 12:10:54,704 INFO L226 Difference]: Without dead ends: 78 [2019-09-05 12:10:54,704 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-09-05 12:10:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-05 12:10:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-05 12:10:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-05 12:10:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-09-05 12:10:54,711 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-09-05 12:10:54,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:54,711 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-09-05 12:10:54,712 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-05 12:10:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-09-05 12:10:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-05 12:10:54,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:54,712 INFO L399 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:54,712 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash -721704512, now seen corresponding path program 61 times [2019-09-05 12:10:54,713 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:54,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:54,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:54,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:54,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:54,725 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:54,725 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:54,725 INFO L223 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) [2019-09-05 12:10:54,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:10:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:10:54,935 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-09-05 12:10:54,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:57,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:10:57,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:57,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-09-05 12:10:57,237 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-05 12:10:57,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-05 12:10:57,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-09-05 12:10:57,238 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-09-05 12:11:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:00,456 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-09-05 12:11:00,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-05 12:11:00,457 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-09-05 12:11:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:00,458 INFO L225 Difference]: With dead ends: 82 [2019-09-05 12:11:00,458 INFO L226 Difference]: Without dead ends: 79 [2019-09-05 12:11:00,458 INFO L628 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 [2019-09-05 12:11:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-05 12:11:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-05 12:11:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-05 12:11:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-09-05 12:11:00,466 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-09-05 12:11:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:00,467 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-09-05 12:11:00,467 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-05 12:11:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-09-05 12:11:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-05 12:11:00,467 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:00,467 INFO L399 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:00,468 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:00,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:00,468 INFO L82 PathProgramCache]: Analyzing trace with hash -898065850, now seen corresponding path program 62 times [2019-09-05 12:11:00,468 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:00,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:00,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:00,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:00,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:00,476 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:00,476 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:00,476 INFO L223 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 [2019-09-05 12:11:00,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:11:00,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:11:00,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:00,688 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-09-05 12:11:00,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:02,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:03,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:03,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-09-05 12:11:03,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-05 12:11:03,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-05 12:11:03,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-09-05 12:11:03,069 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-09-05 12:11:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:06,395 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-09-05 12:11:06,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-05 12:11:06,395 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-09-05 12:11:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:06,396 INFO L225 Difference]: With dead ends: 83 [2019-09-05 12:11:06,396 INFO L226 Difference]: Without dead ends: 80 [2019-09-05 12:11:06,397 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2019-09-05 12:11:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-05 12:11:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-09-05 12:11:06,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-05 12:11:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-09-05 12:11:06,406 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-09-05 12:11:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:06,406 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-09-05 12:11:06,406 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-05 12:11:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-09-05 12:11:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-05 12:11:06,407 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:06,407 INFO L399 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:06,407 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2070300032, now seen corresponding path program 63 times [2019-09-05 12:11:06,408 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:06,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:06,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:06,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:06,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:06,417 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:06,417 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:06,418 INFO L223 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) [2019-09-05 12:11:06,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:11,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-05 12:11:11,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:11,632 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-09-05 12:11:11,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:14,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:14,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:14,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-09-05 12:11:14,098 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-05 12:11:14,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-05 12:11:14,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-09-05 12:11:14,099 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-09-05 12:11:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:17,519 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-09-05 12:11:17,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-05 12:11:17,519 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-09-05 12:11:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:17,521 INFO L225 Difference]: With dead ends: 84 [2019-09-05 12:11:17,521 INFO L226 Difference]: Without dead ends: 81 [2019-09-05 12:11:17,521 INFO L628 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 [2019-09-05 12:11:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-05 12:11:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-05 12:11:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-05 12:11:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-09-05 12:11:17,530 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-09-05 12:11:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:17,530 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-09-05 12:11:17,530 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-05 12:11:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-09-05 12:11:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-05 12:11:17,531 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:17,531 INFO L399 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:17,531 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash 245145990, now seen corresponding path program 64 times [2019-09-05 12:11:17,531 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:17,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:17,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:17,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:17,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:17,538 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:17,538 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:17,538 INFO L223 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 [2019-09-05 12:11:17,548 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:11:18,412 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:11:18,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:18,417 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-09-05 12:11:18,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:20,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:20,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:20,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-09-05 12:11:20,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-09-05 12:11:20,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-09-05 12:11:20,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-09-05 12:11:20,950 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-09-05 12:11:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:24,513 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-09-05 12:11:24,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-05 12:11:24,513 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-09-05 12:11:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:24,514 INFO L225 Difference]: With dead ends: 85 [2019-09-05 12:11:24,514 INFO L226 Difference]: Without dead ends: 82 [2019-09-05 12:11:24,514 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2019-09-05 12:11:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-05 12:11:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-05 12:11:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-05 12:11:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-09-05 12:11:24,520 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-09-05 12:11:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:24,520 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-09-05 12:11:24,520 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-09-05 12:11:24,520 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-09-05 12:11:24,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-05 12:11:24,521 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:24,521 INFO L399 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:24,521 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:24,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:24,521 INFO L82 PathProgramCache]: Analyzing trace with hash -990471360, now seen corresponding path program 65 times [2019-09-05 12:11:24,521 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:24,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:24,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:24,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:24,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:24,530 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:24,530 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:24,530 INFO L223 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) [2019-09-05 12:11:24,547 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:25,186 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-05 12:11:25,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:25,204 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-09-05 12:11:25,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:27,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:27,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:27,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-09-05 12:11:27,990 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-05 12:11:27,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-05 12:11:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-09-05 12:11:27,991 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-09-05 12:11:31,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:31,613 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-09-05 12:11:31,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-05 12:11:31,613 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-09-05 12:11:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:31,614 INFO L225 Difference]: With dead ends: 86 [2019-09-05 12:11:31,614 INFO L226 Difference]: Without dead ends: 83 [2019-09-05 12:11:31,615 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2019-09-05 12:11:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-05 12:11:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-05 12:11:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-05 12:11:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-09-05 12:11:31,633 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-09-05 12:11:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:31,634 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-09-05 12:11:31,634 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-09-05 12:11:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-09-05 12:11:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-05 12:11:31,634 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:31,634 INFO L399 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:31,635 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:31,635 INFO L82 PathProgramCache]: Analyzing trace with hash -639903546, now seen corresponding path program 66 times [2019-09-05 12:11:31,635 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:31,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:31,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:31,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:31,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:31,643 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:31,644 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:31,644 INFO L223 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 [2019-09-05 12:11:31,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:11:35,250 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-09-05 12:11:35,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:35,256 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-09-05 12:11:35,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:37,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:37,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:37,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-09-05 12:11:37,929 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-05 12:11:37,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-05 12:11:37,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-09-05 12:11:37,930 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-09-05 12:11:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:41,639 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-09-05 12:11:41,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-05 12:11:41,640 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-09-05 12:11:41,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:41,641 INFO L225 Difference]: With dead ends: 87 [2019-09-05 12:11:41,641 INFO L226 Difference]: Without dead ends: 84 [2019-09-05 12:11:41,642 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2019-09-05 12:11:41,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-05 12:11:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-05 12:11:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-05 12:11:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-05 12:11:41,650 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-09-05 12:11:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:41,651 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-05 12:11:41,651 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-05 12:11:41,651 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-05 12:11:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-05 12:11:41,651 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:41,651 INFO L399 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:41,652 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:41,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:41,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1637764096, now seen corresponding path program 67 times [2019-09-05 12:11:41,652 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:41,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:41,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:41,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:41,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:41,660 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:41,660 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:41,660 INFO L223 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 [2019-09-05 12:11:41,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:41,909 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-09-05 12:11:41,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:44,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:44,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:44,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-09-05 12:11:44,843 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-09-05 12:11:44,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-09-05 12:11:44,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-09-05 12:11:44,844 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-09-05 12:11:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:48,605 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-09-05 12:11:48,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-09-05 12:11:48,606 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-09-05 12:11:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:48,607 INFO L225 Difference]: With dead ends: 88 [2019-09-05 12:11:48,607 INFO L226 Difference]: Without dead ends: 85 [2019-09-05 12:11:48,607 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-09-05 12:11:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-05 12:11:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-09-05 12:11:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-05 12:11:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-09-05 12:11:48,617 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-09-05 12:11:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:48,617 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-09-05 12:11:48,617 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-09-05 12:11:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-09-05 12:11:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-05 12:11:48,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:48,618 INFO L399 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:48,618 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:48,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:48,619 INFO L82 PathProgramCache]: Analyzing trace with hash -768983034, now seen corresponding path program 68 times [2019-09-05 12:11:48,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:48,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:48,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:48,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:48,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:48,627 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:48,627 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:48,627 INFO L223 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) [2019-09-05 12:11:48,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:48,891 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:11:48,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:48,896 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-09-05 12:11:48,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:51,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:51,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:51,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-09-05 12:11:51,703 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-09-05 12:11:51,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-09-05 12:11:51,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-09-05 12:11:51,703 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-09-05 12:11:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:55,662 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-09-05 12:11:55,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-09-05 12:11:55,662 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-09-05 12:11:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:55,663 INFO L225 Difference]: With dead ends: 89 [2019-09-05 12:11:55,663 INFO L226 Difference]: Without dead ends: 86 [2019-09-05 12:11:55,663 INFO L628 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 [2019-09-05 12:11:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-05 12:11:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-05 12:11:55,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-05 12:11:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-09-05 12:11:55,671 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-09-05 12:11:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:55,671 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-09-05 12:11:55,671 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-09-05 12:11:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-09-05 12:11:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-05 12:11:55,671 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:55,672 INFO L399 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:55,672 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1931267264, now seen corresponding path program 69 times [2019-09-05 12:11:55,672 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:55,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:55,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:55,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:55,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:55,680 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:55,680 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:55,680 INFO L223 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 [2019-09-05 12:11:55,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:12:01,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-05 12:12:01,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:01,535 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-09-05 12:12:01,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:04,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:04,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:04,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-09-05 12:12:04,368 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-05 12:12:04,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-05 12:12:04,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-09-05 12:12:04,369 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-09-05 12:12:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:08,345 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-09-05 12:12:08,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-05 12:12:08,346 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-09-05 12:12:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:08,347 INFO L225 Difference]: With dead ends: 90 [2019-09-05 12:12:08,347 INFO L226 Difference]: Without dead ends: 87 [2019-09-05 12:12:08,348 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2019-09-05 12:12:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-05 12:12:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-05 12:12:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-05 12:12:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-09-05 12:12:08,357 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-09-05 12:12:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:08,357 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-09-05 12:12:08,357 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-05 12:12:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-09-05 12:12:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-05 12:12:08,358 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:08,358 INFO L399 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:08,358 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:08,358 INFO L82 PathProgramCache]: Analyzing trace with hash -260319418, now seen corresponding path program 70 times [2019-09-05 12:12:08,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:08,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:08,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:08,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:08,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:08,366 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:08,366 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:08,366 INFO L223 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 [2019-09-05 12:12:08,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:12:09,384 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:12:09,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:09,389 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-09-05 12:12:09,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:12,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:12,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:12,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-09-05 12:12:12,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-05 12:12:12,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-05 12:12:12,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-09-05 12:12:12,275 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-09-05 12:12:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:16,383 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-09-05 12:12:16,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-05 12:12:16,384 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-09-05 12:12:16,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:16,385 INFO L225 Difference]: With dead ends: 91 [2019-09-05 12:12:16,385 INFO L226 Difference]: Without dead ends: 88 [2019-09-05 12:12:16,385 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2019-09-05 12:12:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-05 12:12:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-05 12:12:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-05 12:12:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-09-05 12:12:16,392 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-09-05 12:12:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:16,392 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-09-05 12:12:16,392 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-05 12:12:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-09-05 12:12:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-05 12:12:16,392 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:16,393 INFO L399 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:16,393 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 519970176, now seen corresponding path program 71 times [2019-09-05 12:12:16,393 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:16,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:16,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:16,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:16,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:16,400 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:16,401 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:16,401 INFO L223 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 [2019-09-05 12:12:16,412 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:12:16,765 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-09-05 12:12:16,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:16,771 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-09-05 12:12:16,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:19,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:19,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:19,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-09-05 12:12:19,802 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-09-05 12:12:19,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-09-05 12:12:19,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-09-05 12:12:19,803 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-09-05 12:12:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:24,028 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-09-05 12:12:24,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-09-05 12:12:24,029 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-09-05 12:12:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:24,029 INFO L225 Difference]: With dead ends: 92 [2019-09-05 12:12:24,030 INFO L226 Difference]: Without dead ends: 89 [2019-09-05 12:12:24,030 INFO L628 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 [2019-09-05 12:12:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-05 12:12:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-05 12:12:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-05 12:12:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-09-05 12:12:24,037 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-09-05 12:12:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:24,037 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-09-05 12:12:24,038 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-09-05 12:12:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-09-05 12:12:24,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-05 12:12:24,038 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:24,038 INFO L399 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:24,038 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1060856186, now seen corresponding path program 72 times [2019-09-05 12:12:24,039 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:24,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:24,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:24,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:24,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:24,046 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:24,047 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:24,047 INFO L223 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) [2019-09-05 12:12:24,078 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:29,581 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-09-05 12:12:29,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:29,591 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-09-05 12:12:29,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:32,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:32,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:32,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-09-05 12:12:32,643 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-09-05 12:12:32,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-09-05 12:12:32,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-09-05 12:12:32,644 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-09-05 12:12:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:36,969 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-09-05 12:12:36,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-09-05 12:12:36,970 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-09-05 12:12:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:36,971 INFO L225 Difference]: With dead ends: 93 [2019-09-05 12:12:36,971 INFO L226 Difference]: Without dead ends: 90 [2019-09-05 12:12:36,971 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-09-05 12:12:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-05 12:12:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-05 12:12:36,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-05 12:12:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-09-05 12:12:36,979 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-09-05 12:12:36,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:36,979 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-09-05 12:12:36,979 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-09-05 12:12:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-09-05 12:12:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-05 12:12:36,980 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:36,980 INFO L399 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:36,980 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1473134144, now seen corresponding path program 73 times [2019-09-05 12:12:36,981 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:36,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:36,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:36,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:36,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:36,989 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:36,989 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:36,989 INFO L223 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 [2019-09-05 12:12:37,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:12:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:12:37,268 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-09-05 12:12:37,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:40,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:40,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:40,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-09-05 12:12:40,440 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-05 12:12:40,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-05 12:12:40,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-09-05 12:12:40,441 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-09-05 12:12:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:44,956 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-09-05 12:12:44,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-05 12:12:44,956 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-09-05 12:12:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:44,956 INFO L225 Difference]: With dead ends: 94 [2019-09-05 12:12:44,957 INFO L226 Difference]: Without dead ends: 91 [2019-09-05 12:12:44,957 INFO L628 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 [2019-09-05 12:12:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-05 12:12:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-05 12:12:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-05 12:12:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-09-05 12:12:44,963 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-09-05 12:12:44,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:44,963 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-09-05 12:12:44,963 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-05 12:12:44,963 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-09-05 12:12:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-05 12:12:44,964 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:44,964 INFO L399 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:44,964 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:44,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1577544250, now seen corresponding path program 74 times [2019-09-05 12:12:44,964 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:44,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:44,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:44,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:12:44,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:44,972 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:44,972 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:44,972 INFO L223 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 [2019-09-05 12:12:45,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:12:45,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:12:45,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:45,290 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-09-05 12:12:45,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:48,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:48,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:48,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-09-05 12:12:48,644 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-05 12:12:48,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-05 12:12:48,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-09-05 12:12:48,645 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-09-05 12:12:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:53,141 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-09-05 12:12:53,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-05 12:12:53,141 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-09-05 12:12:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:53,142 INFO L225 Difference]: With dead ends: 95 [2019-09-05 12:12:53,142 INFO L226 Difference]: Without dead ends: 92 [2019-09-05 12:12:53,143 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2019-09-05 12:12:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-05 12:12:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-05 12:12:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-05 12:12:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-05 12:12:53,152 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-09-05 12:12:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:53,152 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-05 12:12:53,152 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-05 12:12:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-05 12:12:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-05 12:12:53,153 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:53,153 INFO L399 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:53,153 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1659293952, now seen corresponding path program 75 times [2019-09-05 12:12:53,153 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:53,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:53,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:53,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:53,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:53,160 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:53,160 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:53,161 INFO L223 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 [2019-09-05 12:12:53,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:12:59,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-09-05 12:12:59,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:59,543 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-09-05 12:12:59,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:02,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:02,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:02,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-09-05 12:13:02,771 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-09-05 12:13:02,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-09-05 12:13:02,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-09-05 12:13:02,772 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-09-05 12:13:07,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:07,388 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-09-05 12:13:07,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-09-05 12:13:07,389 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-09-05 12:13:07,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:07,390 INFO L225 Difference]: With dead ends: 96 [2019-09-05 12:13:07,390 INFO L226 Difference]: Without dead ends: 93 [2019-09-05 12:13:07,390 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2019-09-05 12:13:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-05 12:13:07,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-05 12:13:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-05 12:13:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-09-05 12:13:07,398 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-09-05 12:13:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:07,398 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-09-05 12:13:07,398 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-09-05 12:13:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-09-05 12:13:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-05 12:13:07,398 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:07,399 INFO L399 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:07,399 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:07,399 INFO L82 PathProgramCache]: Analyzing trace with hash 101432582, now seen corresponding path program 76 times [2019-09-05 12:13:07,399 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:07,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:07,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:07,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:07,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:07,407 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:07,408 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:07,408 INFO L223 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 [2019-09-05 12:13:07,438 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:13:08,590 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:13:08,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:08,596 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-09-05 12:13:08,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:11,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:11,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:11,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-09-05 12:13:11,916 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-05 12:13:11,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-05 12:13:11,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-09-05 12:13:11,917 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-09-05 12:13:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:16,659 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-09-05 12:13:16,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-09-05 12:13:16,660 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-09-05 12:13:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:16,661 INFO L225 Difference]: With dead ends: 97 [2019-09-05 12:13:16,661 INFO L226 Difference]: Without dead ends: 94 [2019-09-05 12:13:16,661 INFO L628 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 [2019-09-05 12:13:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-05 12:13:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-05 12:13:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-05 12:13:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-09-05 12:13:16,669 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-09-05 12:13:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:16,669 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-09-05 12:13:16,669 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-05 12:13:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-09-05 12:13:16,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-05 12:13:16,670 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:16,670 INFO L399 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:16,670 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:16,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1150619712, now seen corresponding path program 77 times [2019-09-05 12:13:16,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:16,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:16,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:16,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:16,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:16,678 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:16,678 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:16,679 INFO L223 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 [2019-09-05 12:13:16,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:13:17,133 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-05 12:13:17,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:17,143 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-09-05 12:13:17,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:20,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:20,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:20,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-09-05 12:13:20,554 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-09-05 12:13:20,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-09-05 12:13:20,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-09-05 12:13:20,555 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-09-05 12:13:25,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:25,422 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-09-05 12:13:25,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-05 12:13:25,422 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-09-05 12:13:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:25,423 INFO L225 Difference]: With dead ends: 98 [2019-09-05 12:13:25,424 INFO L226 Difference]: Without dead ends: 95 [2019-09-05 12:13:25,424 INFO L628 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 [2019-09-05 12:13:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-05 12:13:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-09-05 12:13:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-05 12:13:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-09-05 12:13:25,434 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-09-05 12:13:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:25,435 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-09-05 12:13:25,435 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-09-05 12:13:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-09-05 12:13:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-05 12:13:25,435 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:25,435 INFO L399 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:25,436 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:25,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1309535162, now seen corresponding path program 78 times [2019-09-05 12:13:25,436 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:25,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:25,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:25,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:25,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:25,444 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:25,444 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:25,444 INFO L223 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 [2019-09-05 12:13:25,460 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:13:33,162 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-09-05 12:13:33,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:33,169 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-09-05 12:13:33,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:36,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:36,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:36,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-09-05 12:13:36,664 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-05 12:13:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-05 12:13:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-09-05 12:13:36,665 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-09-05 12:13:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:41,773 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-09-05 12:13:41,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-05 12:13:41,773 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-09-05 12:13:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:41,774 INFO L225 Difference]: With dead ends: 99 [2019-09-05 12:13:41,775 INFO L226 Difference]: Without dead ends: 96 [2019-09-05 12:13:41,775 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2019-09-05 12:13:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-05 12:13:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-05 12:13:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-05 12:13:41,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-09-05 12:13:41,783 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-09-05 12:13:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:41,783 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-09-05 12:13:41,783 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-05 12:13:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-09-05 12:13:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-05 12:13:41,784 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:41,784 INFO L399 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:41,784 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:41,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1940946816, now seen corresponding path program 79 times [2019-09-05 12:13:41,785 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:41,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:41,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:41,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:41,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:41,801 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:41,801 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:41,801 INFO L223 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 [2019-09-05 12:13:41,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:13:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:13:42,142 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-09-05 12:13:42,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:45,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:45,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:45,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-09-05 12:13:45,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-05 12:13:45,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-05 12:13:45,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-09-05 12:13:45,648 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-09-05 12:13:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:50,712 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-09-05 12:13:50,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-05 12:13:50,713 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-09-05 12:13:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:50,714 INFO L225 Difference]: With dead ends: 100 [2019-09-05 12:13:50,714 INFO L226 Difference]: Without dead ends: 97 [2019-09-05 12:13:50,715 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-09-05 12:13:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-05 12:13:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-05 12:13:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-05 12:13:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-09-05 12:13:50,722 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-09-05 12:13:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:50,722 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-09-05 12:13:50,722 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-05 12:13:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-09-05 12:13:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-05 12:13:50,723 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:50,723 INFO L399 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:50,723 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:50,723 INFO L82 PathProgramCache]: Analyzing trace with hash -39871610, now seen corresponding path program 80 times [2019-09-05 12:13:50,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:50,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:50,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:50,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:13:50,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:50,730 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:50,730 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:50,730 INFO L223 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) [2019-09-05 12:13:50,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:13:51,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:13:51,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:51,089 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-09-05 12:13:51,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:54,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:54,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:54,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-09-05 12:13:54,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-09-05 12:13:54,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-09-05 12:13:54,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-09-05 12:13:54,753 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-09-05 12:13:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:59,931 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-09-05 12:13:59,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-09-05 12:13:59,931 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-09-05 12:13:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:59,932 INFO L225 Difference]: With dead ends: 101 [2019-09-05 12:13:59,932 INFO L226 Difference]: Without dead ends: 98 [2019-09-05 12:13:59,933 INFO L628 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 [2019-09-05 12:13:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-05 12:13:59,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-05 12:13:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-05 12:13:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-09-05 12:13:59,940 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-09-05 12:13:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:59,940 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-09-05 12:13:59,940 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-09-05 12:13:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-09-05 12:13:59,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-05 12:13:59,941 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:59,941 INFO L399 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:59,941 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:59,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1236082368, now seen corresponding path program 81 times [2019-09-05 12:13:59,942 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:59,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:59,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:59,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:59,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:59,949 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:59,949 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:59,950 INFO L223 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 [2019-09-05 12:13:59,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:14:07,435 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-09-05 12:14:07,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:07,441 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-09-05 12:14:07,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:11,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:11,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:11,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-09-05 12:14:11,199 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-05 12:14:11,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-05 12:14:11,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-09-05 12:14:11,200 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-09-05 12:14:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:16,551 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-09-05 12:14:16,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-05 12:14:16,551 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-09-05 12:14:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:16,552 INFO L225 Difference]: With dead ends: 102 [2019-09-05 12:14:16,552 INFO L226 Difference]: Without dead ends: 99 [2019-09-05 12:14:16,553 INFO L628 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 [2019-09-05 12:14:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-05 12:14:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-09-05 12:14:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-05 12:14:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-09-05 12:14:16,561 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-09-05 12:14:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:16,562 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-09-05 12:14:16,562 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-05 12:14:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-09-05 12:14:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-05 12:14:16,562 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:16,562 INFO L399 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:16,562 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:16,563 INFO L82 PathProgramCache]: Analyzing trace with hash 336089798, now seen corresponding path program 82 times [2019-09-05 12:14:16,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:16,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:16,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:16,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:16,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:16,571 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:16,571 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:16,571 INFO L223 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 [2019-09-05 12:14:16,588 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:14:17,902 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:14:17,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:17,908 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-09-05 12:14:17,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:21,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:21,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:21,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-09-05 12:14:21,741 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-05 12:14:21,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-05 12:14:21,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-09-05 12:14:21,741 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-09-05 12:14:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:27,204 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-09-05 12:14:27,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-05 12:14:27,204 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-09-05 12:14:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:27,205 INFO L225 Difference]: With dead ends: 103 [2019-09-05 12:14:27,205 INFO L226 Difference]: Without dead ends: 100 [2019-09-05 12:14:27,206 INFO L628 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 [2019-09-05 12:14:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-05 12:14:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-05 12:14:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-05 12:14:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-05 12:14:27,213 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-09-05 12:14:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:27,213 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-05 12:14:27,213 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-05 12:14:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-05 12:14:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-05 12:14:27,214 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:27,214 INFO L399 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:27,214 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:27,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:27,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1828786688, now seen corresponding path program 83 times [2019-09-05 12:14:27,215 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:27,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:27,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:27,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:27,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:27,221 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:27,221 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:27,221 INFO L223 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 [2019-09-05 12:14:27,232 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:14:27,754 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-09-05 12:14:27,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:27,765 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-09-05 12:14:27,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:31,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:31,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:31,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-09-05 12:14:31,610 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-09-05 12:14:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-09-05 12:14:31,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-09-05 12:14:31,611 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-09-05 12:14:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:37,195 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-09-05 12:14:37,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-05 12:14:37,195 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-09-05 12:14:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:37,196 INFO L225 Difference]: With dead ends: 104 [2019-09-05 12:14:37,196 INFO L226 Difference]: Without dead ends: 101 [2019-09-05 12:14:37,197 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-09-05 12:14:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-05 12:14:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-09-05 12:14:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-05 12:14:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-09-05 12:14:37,205 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-09-05 12:14:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:37,205 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-09-05 12:14:37,205 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-09-05 12:14:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-09-05 12:14:37,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-05 12:14:37,205 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:37,205 INFO L399 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:37,206 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:37,206 INFO L82 PathProgramCache]: Analyzing trace with hash 857750022, now seen corresponding path program 84 times [2019-09-05 12:14:37,206 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:37,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:37,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:37,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:37,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:37,214 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:37,214 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:37,214 INFO L223 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 [2019-09-05 12:14:37,226 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:14:46,009 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-05 12:14:46,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:46,016 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-09-05 12:14:46,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:49,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:49,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:49,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-09-05 12:14:49,947 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-09-05 12:14:49,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-09-05 12:14:49,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-09-05 12:14:49,948 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-09-05 12:14:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:55,602 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-09-05 12:14:55,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-09-05 12:14:55,602 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-09-05 12:14:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:55,603 INFO L225 Difference]: With dead ends: 105 [2019-09-05 12:14:55,603 INFO L226 Difference]: Without dead ends: 102 [2019-09-05 12:14:55,604 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2019-09-05 12:14:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-05 12:14:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-09-05 12:14:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-05 12:14:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-09-05 12:14:55,612 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-09-05 12:14:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:55,612 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-09-05 12:14:55,612 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-09-05 12:14:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-09-05 12:14:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-05 12:14:55,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:55,613 INFO L399 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:55,613 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:55,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:55,613 INFO L82 PathProgramCache]: Analyzing trace with hash 820384448, now seen corresponding path program 85 times [2019-09-05 12:14:55,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:55,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:55,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:55,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:55,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:55,623 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:55,623 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:55,623 INFO L223 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) [2019-09-05 12:14:55,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:14:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:56,047 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-09-05 12:14:56,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:15:00,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:15:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:15:00,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:15:00,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-09-05 12:15:00,230 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-05 12:15:00,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-05 12:15:00,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-09-05 12:15:00,231 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-09-05 12:15:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:15:06,102 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-09-05 12:15:06,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-05 12:15:06,103 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-09-05 12:15:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:15:06,105 INFO L225 Difference]: With dead ends: 106 [2019-09-05 12:15:06,106 INFO L226 Difference]: Without dead ends: 103 [2019-09-05 12:15:06,106 INFO L628 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 [2019-09-05 12:15:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-05 12:15:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-05 12:15:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-05 12:15:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-09-05 12:15:06,115 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-09-05 12:15:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:15:06,115 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-09-05 12:15:06,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-05 12:15:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-09-05 12:15:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-05 12:15:06,116 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:15:06,116 INFO L399 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:15:06,116 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:15:06,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:15:06,117 INFO L82 PathProgramCache]: Analyzing trace with hash -337948346, now seen corresponding path program 86 times [2019-09-05 12:15:06,117 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:15:06,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:15:06,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:06,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:15:06,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:06,124 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:15:06,124 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:15:06,124 INFO L223 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 [2019-09-05 12:15:06,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:15:06,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:15:06,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:15:06,547 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-09-05 12:15:06,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:15:10,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:15:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:15:10,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:15:10,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-09-05 12:15:10,644 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-05 12:15:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-05 12:15:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-09-05 12:15:10,645 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-09-05 12:15:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:15:16,571 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-09-05 12:15:16,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-05 12:15:16,572 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-09-05 12:15:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:15:16,573 INFO L225 Difference]: With dead ends: 107 [2019-09-05 12:15:16,573 INFO L226 Difference]: Without dead ends: 104 [2019-09-05 12:15:16,574 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2019-09-05 12:15:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-05 12:15:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-05 12:15:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-05 12:15:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-09-05 12:15:16,584 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-09-05 12:15:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:15:16,584 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-09-05 12:15:16,584 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-05 12:15:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-09-05 12:15:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-05 12:15:16,585 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:15:16,585 INFO L399 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:15:16,585 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:15:16,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:15:16,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1886526592, now seen corresponding path program 87 times [2019-09-05 12:15:16,586 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:15:16,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:15:16,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:16,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:15:16,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:16,594 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:15:16,595 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:15:16,595 INFO L223 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 [2019-09-05 12:15:16,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:15:25,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-09-05 12:15:25,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:15:25,092 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-09-05 12:15:25,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:15:29,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:15:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:15:29,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:15:29,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-09-05 12:15:29,256 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-05 12:15:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-05 12:15:29,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-09-05 12:15:29,257 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-09-05 12:15:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:15:35,251 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-09-05 12:15:35,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-09-05 12:15:35,252 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-09-05 12:15:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:15:35,253 INFO L225 Difference]: With dead ends: 108 [2019-09-05 12:15:35,253 INFO L226 Difference]: Without dead ends: 105 [2019-09-05 12:15:35,254 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-09-05 12:15:35,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-05 12:15:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-09-05 12:15:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-05 12:15:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-09-05 12:15:35,263 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-09-05 12:15:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:15:35,263 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-09-05 12:15:35,263 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-05 12:15:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-09-05 12:15:35,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-05 12:15:35,264 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:15:35,264 INFO L399 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:15:35,264 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:15:35,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:15:35,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1647155334, now seen corresponding path program 88 times [2019-09-05 12:15:35,265 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:15:35,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:15:35,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:35,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:15:35,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:35,273 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:15:35,273 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:15:35,273 INFO L223 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 [2019-09-05 12:15:35,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:15:36,750 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:15:36,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:15:36,756 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-09-05 12:15:36,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:15:40,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:15:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:15:41,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:15:41,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-09-05 12:15:41,002 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-05 12:15:41,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-05 12:15:41,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-09-05 12:15:41,003 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-09-05 12:15:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:15:47,150 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-09-05 12:15:47,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-09-05 12:15:47,151 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-09-05 12:15:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:15:47,152 INFO L225 Difference]: With dead ends: 109 [2019-09-05 12:15:47,152 INFO L226 Difference]: Without dead ends: 106 [2019-09-05 12:15:47,153 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-09-05 12:15:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-05 12:15:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-05 12:15:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-05 12:15:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-09-05 12:15:47,164 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-09-05 12:15:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:15:47,164 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-09-05 12:15:47,164 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-05 12:15:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-09-05 12:15:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-05 12:15:47,165 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:15:47,165 INFO L399 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:15:47,165 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:15:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:15:47,166 INFO L82 PathProgramCache]: Analyzing trace with hash -477854656, now seen corresponding path program 89 times [2019-09-05 12:15:47,166 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:15:47,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:15:47,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:47,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:15:47,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:47,174 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:15:47,174 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:15:47,174 INFO L223 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 [2019-09-05 12:15:47,205 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:15:47,774 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-09-05 12:15:47,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:15:47,785 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-09-05 12:15:47,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:15:52,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:15:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:15:52,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:15:52,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-09-05 12:15:52,151 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-05 12:15:52,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-05 12:15:52,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-09-05 12:15:52,152 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-09-05 12:15:58,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:15:58,462 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-09-05 12:15:58,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-09-05 12:15:58,463 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-09-05 12:15:58,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:15:58,464 INFO L225 Difference]: With dead ends: 110 [2019-09-05 12:15:58,464 INFO L226 Difference]: Without dead ends: 107 [2019-09-05 12:15:58,464 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-09-05 12:15:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-05 12:15:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-09-05 12:15:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-05 12:15:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-09-05 12:15:58,475 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-09-05 12:15:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:15:58,475 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-09-05 12:15:58,475 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-05 12:15:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-09-05 12:15:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-05 12:15:58,476 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:15:58,476 INFO L399 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:15:58,476 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:15:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:15:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1928654906, now seen corresponding path program 90 times [2019-09-05 12:15:58,477 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:15:58,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:15:58,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:58,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:15:58,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:58,485 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:15:58,485 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:15:58,485 INFO L223 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 [2019-09-05 12:15:58,495 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:16:10,107 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-09-05 12:16:10,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:10,118 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-09-05 12:16:10,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:14,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:16:14,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:14,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-09-05 12:16:14,561 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-05 12:16:14,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-05 12:16:14,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-09-05 12:16:14,561 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-09-05 12:16:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:20,978 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-09-05 12:16:20,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-05 12:16:20,978 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-09-05 12:16:20,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:20,980 INFO L225 Difference]: With dead ends: 111 [2019-09-05 12:16:20,980 INFO L226 Difference]: Without dead ends: 108 [2019-09-05 12:16:20,981 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=199, Invalid=9701, Unknown=0, NotChecked=0, Total=9900 [2019-09-05 12:16:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-05 12:16:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-05 12:16:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-05 12:16:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-05 12:16:20,991 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-09-05 12:16:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:20,991 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-05 12:16:20,991 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-05 12:16:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-05 12:16:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-05 12:16:20,992 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:20,992 INFO L399 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:20,992 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash 341177600, now seen corresponding path program 91 times [2019-09-05 12:16:20,993 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:20,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:20,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:20,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:20,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:21,001 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:21,001 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:21,001 INFO L223 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 [2019-09-05 12:16:21,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:16:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:16:21,463 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-09-05 12:16:21,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:25,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:16:25,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:25,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-09-05 12:16:25,985 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-05 12:16:25,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-05 12:16:25,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-09-05 12:16:25,986 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-09-05 12:16:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:32,563 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-09-05 12:16:32,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-05 12:16:32,563 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-09-05 12:16:32,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:32,564 INFO L225 Difference]: With dead ends: 112 [2019-09-05 12:16:32,564 INFO L226 Difference]: Without dead ends: 109 [2019-09-05 12:16:32,565 INFO L628 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 [2019-09-05 12:16:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-05 12:16:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-09-05 12:16:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-05 12:16:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-09-05 12:16:32,573 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-09-05 12:16:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:32,573 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-09-05 12:16:32,573 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-05 12:16:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-09-05 12:16:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-05 12:16:32,574 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:32,574 INFO L399 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:32,574 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:32,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1986508550, now seen corresponding path program 92 times [2019-09-05 12:16:32,574 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:32,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:32,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:32,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:16:32,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:32,580 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:32,580 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:32,581 INFO L223 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 [2019-09-05 12:16:32,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:16:33,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:16:33,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:33,040 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-09-05 12:16:33,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:37,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:16:37,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:37,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-09-05 12:16:37,826 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-09-05 12:16:37,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-09-05 12:16:37,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-09-05 12:16:37,827 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-09-05 12:16:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:44,503 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-09-05 12:16:44,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-09-05 12:16:44,504 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-09-05 12:16:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:44,505 INFO L225 Difference]: With dead ends: 113 [2019-09-05 12:16:44,505 INFO L226 Difference]: Without dead ends: 110 [2019-09-05 12:16:44,505 INFO L628 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 [2019-09-05 12:16:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-05 12:16:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-05 12:16:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-05 12:16:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-09-05 12:16:44,525 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-09-05 12:16:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:44,525 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-09-05 12:16:44,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-09-05 12:16:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-09-05 12:16:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-05 12:16:44,526 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:44,526 INFO L399 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:44,526 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:44,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1452160448, now seen corresponding path program 93 times [2019-09-05 12:16:44,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:44,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:44,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:44,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:44,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:44,533 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:44,533 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:44,533 INFO L223 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 [2019-09-05 12:16:44,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:17:12,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-09-05 12:17:12,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:17:12,439 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-09-05 12:17:12,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:17:17,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:17:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:17:17,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:17:17,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-09-05 12:17:17,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-09-05 12:17:17,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-09-05 12:17:17,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-09-05 12:17:17,152 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-09-05 12:17:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:17:23,968 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-09-05 12:17:23,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-05 12:17:23,968 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-09-05 12:17:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:17:23,969 INFO L225 Difference]: With dead ends: 114 [2019-09-05 12:17:23,970 INFO L226 Difference]: Without dead ends: 111 [2019-09-05 12:17:23,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-09-05 12:17:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-05 12:17:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-09-05 12:17:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-05 12:17:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-09-05 12:17:23,979 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-09-05 12:17:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:17:23,979 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-09-05 12:17:23,979 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-09-05 12:17:23,979 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-09-05 12:17:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-05 12:17:23,980 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:17:23,980 INFO L399 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:17:23,980 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:17:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:17:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2067238470, now seen corresponding path program 94 times [2019-09-05 12:17:23,981 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:17:23,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:17:23,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:23,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:17:23,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:23,989 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:17:23,989 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:17:23,989 INFO L223 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) [2019-09-05 12:17:24,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:17:25,755 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:17:25,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:17:25,761 WARN L254 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 407 conjunts are in the unsatisfiable core [2019-09-05 12:17:25,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:17:30,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:17:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:17:30,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:17:30,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2019-09-05 12:17:30,509 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-09-05 12:17:30,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-09-05 12:17:30,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2019-09-05 12:17:30,510 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 103 states. [2019-09-05 12:17:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:17:37,473 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2019-09-05 12:17:37,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-09-05 12:17:37,474 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 110 [2019-09-05 12:17:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:17:37,474 INFO L225 Difference]: With dead ends: 115 [2019-09-05 12:17:37,475 INFO L226 Difference]: Without dead ends: 112 [2019-09-05 12:17:37,475 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=207, Invalid=10505, Unknown=0, NotChecked=0, Total=10712 [2019-09-05 12:17:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-05 12:17:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-09-05 12:17:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-05 12:17:37,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2019-09-05 12:17:37,486 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2019-09-05 12:17:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:17:37,486 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2019-09-05 12:17:37,486 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-09-05 12:17:37,487 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2019-09-05 12:17:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-05 12:17:37,487 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:17:37,487 INFO L399 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:17:37,487 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:17:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:17:37,488 INFO L82 PathProgramCache]: Analyzing trace with hash -340179328, now seen corresponding path program 95 times [2019-09-05 12:17:37,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:17:37,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:17:37,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:37,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:17:37,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:37,497 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:17:37,497 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:17:37,497 INFO L223 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 [2019-09-05 12:17:37,516 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:17:38,176 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-09-05 12:17:38,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:17:38,189 WARN L254 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 411 conjunts are in the unsatisfiable core [2019-09-05 12:17:38,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:17:42,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:17:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:17:43,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:17:43,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2019-09-05 12:17:43,027 INFO L454 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-09-05 12:17:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-09-05 12:17:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=10507, Unknown=0, NotChecked=0, Total=10712 [2019-09-05 12:17:43,028 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 104 states. [2019-09-05 12:17:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:17:50,054 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2019-09-05 12:17:50,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-09-05 12:17:50,054 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 111 [2019-09-05 12:17:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:17:50,055 INFO L225 Difference]: With dead ends: 116 [2019-09-05 12:17:50,056 INFO L226 Difference]: Without dead ends: 113 [2019-09-05 12:17:50,056 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=209, Invalid=10711, Unknown=0, NotChecked=0, Total=10920 [2019-09-05 12:17:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-09-05 12:17:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-09-05 12:17:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-05 12:17:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2019-09-05 12:17:50,064 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2019-09-05 12:17:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:17:50,064 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2019-09-05 12:17:50,065 INFO L476 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-09-05 12:17:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2019-09-05 12:17:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-05 12:17:50,065 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:17:50,065 INFO L399 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:17:50,066 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:17:50,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:17:50,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1955687034, now seen corresponding path program 96 times [2019-09-05 12:17:50,066 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:17:50,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:17:50,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:50,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:17:50,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:50,072 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:17:50,072 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:17:50,072 INFO L223 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 [2019-09-05 12:17:50,082 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:18:05,721 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-05 12:18:05,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:05,729 WARN L254 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 415 conjunts are in the unsatisfiable core [2019-09-05 12:18:05,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:10,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:18:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:10,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:18:10,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2019-09-05 12:18:10,662 INFO L454 AbstractCegarLoop]: Interpolant automaton has 105 states [2019-09-05 12:18:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2019-09-05 12:18:10,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=10713, Unknown=0, NotChecked=0, Total=10920 [2019-09-05 12:18:10,663 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 105 states. [2019-09-05 12:18:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:17,869 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2019-09-05 12:18:17,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2019-09-05 12:18:17,869 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 112 [2019-09-05 12:18:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:17,870 INFO L225 Difference]: With dead ends: 117 [2019-09-05 12:18:17,870 INFO L226 Difference]: Without dead ends: 114 [2019-09-05 12:18:17,871 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=211, Invalid=10919, Unknown=0, NotChecked=0, Total=11130 [2019-09-05 12:18:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-05 12:18:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2019-09-05 12:18:17,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-05 12:18:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2019-09-05 12:18:17,879 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2019-09-05 12:18:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:17,879 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2019-09-05 12:18:17,879 INFO L476 AbstractCegarLoop]: Interpolant automaton has 105 states. [2019-09-05 12:18:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2019-09-05 12:18:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-05 12:18:17,880 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:17,880 INFO L399 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:17,880 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:17,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:17,880 INFO L82 PathProgramCache]: Analyzing trace with hash -496818368, now seen corresponding path program 97 times [2019-09-05 12:18:17,880 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:17,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:17,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:17,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:17,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:17,887 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:18:17,887 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:18:17,888 INFO L223 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) [2019-09-05 12:18:17,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:18:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:18,457 WARN L254 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 419 conjunts are in the unsatisfiable core [2019-09-05 12:18:18,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:23,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:18:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:23,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:18:23,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2019-09-05 12:18:23,522 INFO L454 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-09-05 12:18:23,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-09-05 12:18:23,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=10921, Unknown=0, NotChecked=0, Total=11130 [2019-09-05 12:18:23,523 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 106 states. [2019-09-05 12:18:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:30,929 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2019-09-05 12:18:30,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2019-09-05 12:18:30,929 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 113 [2019-09-05 12:18:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:30,930 INFO L225 Difference]: With dead ends: 118 [2019-09-05 12:18:30,930 INFO L226 Difference]: Without dead ends: 115 [2019-09-05 12:18:30,931 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=213, Invalid=11129, Unknown=0, NotChecked=0, Total=11342 [2019-09-05 12:18:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-05 12:18:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-09-05 12:18:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-09-05 12:18:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2019-09-05 12:18:30,941 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2019-09-05 12:18:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:30,941 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2019-09-05 12:18:30,941 INFO L476 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-09-05 12:18:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2019-09-05 12:18:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-05 12:18:30,942 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:30,942 INFO L399 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:30,942 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:30,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1778437318, now seen corresponding path program 98 times [2019-09-05 12:18:30,943 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:30,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:30,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:30,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:18:30,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:30,951 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:18:30,951 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:18:30,951 INFO L223 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 [2019-09-05 12:18:30,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:18:31,487 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:18:31,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:31,493 WARN L254 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 423 conjunts are in the unsatisfiable core [2019-09-05 12:18:31,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:36,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:18:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:36,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:18:36,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2019-09-05 12:18:36,627 INFO L454 AbstractCegarLoop]: Interpolant automaton has 107 states [2019-09-05 12:18:36,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2019-09-05 12:18:36,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=11131, Unknown=0, NotChecked=0, Total=11342 [2019-09-05 12:18:36,628 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 107 states. [2019-09-05 12:18:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:44,089 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2019-09-05 12:18:44,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2019-09-05 12:18:44,089 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 114 [2019-09-05 12:18:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:44,090 INFO L225 Difference]: With dead ends: 119 [2019-09-05 12:18:44,090 INFO L226 Difference]: Without dead ends: 116 [2019-09-05 12:18:44,091 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=215, Invalid=11341, Unknown=0, NotChecked=0, Total=11556 [2019-09-05 12:18:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-05 12:18:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-09-05 12:18:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-05 12:18:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2019-09-05 12:18:44,104 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2019-09-05 12:18:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:44,104 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2019-09-05 12:18:44,104 INFO L476 AbstractCegarLoop]: Interpolant automaton has 107 states. [2019-09-05 12:18:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2019-09-05 12:18:44,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-05 12:18:44,105 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:44,105 INFO L399 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:44,105 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:44,106 INFO L82 PathProgramCache]: Analyzing trace with hash -703080448, now seen corresponding path program 99 times [2019-09-05 12:18:44,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:44,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:44,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:44,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:44,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:44,114 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:18:44,114 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:18:44,115 INFO L223 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) [2019-09-05 12:18:44,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:19:07,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2019-09-05 12:19:07,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:19:07,293 WARN L254 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 427 conjunts are in the unsatisfiable core [2019-09-05 12:19:07,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:19:12,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:19:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:19:12,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:19:12,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2019-09-05 12:19:12,493 INFO L454 AbstractCegarLoop]: Interpolant automaton has 108 states [2019-09-05 12:19:12,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2019-09-05 12:19:12,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=11343, Unknown=0, NotChecked=0, Total=11556 [2019-09-05 12:19:12,494 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 108 states. [2019-09-05 12:19:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:19:20,108 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2019-09-05 12:19:20,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2019-09-05 12:19:20,108 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 115 [2019-09-05 12:19:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:19:20,109 INFO L225 Difference]: With dead ends: 120 [2019-09-05 12:19:20,109 INFO L226 Difference]: Without dead ends: 117 [2019-09-05 12:19:20,110 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=217, Invalid=11555, Unknown=0, NotChecked=0, Total=11772 [2019-09-05 12:19:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-05 12:19:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2019-09-05 12:19:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-05 12:19:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2019-09-05 12:19:20,131 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2019-09-05 12:19:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:19:20,131 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2019-09-05 12:19:20,132 INFO L476 AbstractCegarLoop]: Interpolant automaton has 108 states. [2019-09-05 12:19:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2019-09-05 12:19:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-05 12:19:20,132 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:19:20,133 INFO L399 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:19:20,133 INFO L418 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:19:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:19:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash -320719866, now seen corresponding path program 100 times [2019-09-05 12:19:20,133 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:19:20,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:19:20,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:20,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:19:20,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:20,142 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:19:20,142 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:19:20,142 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:19:20,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:19:22,026 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:19:22,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:19:22,033 WARN L254 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 431 conjunts are in the unsatisfiable core [2019-09-05 12:19:22,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:19:27,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:19:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:19:27,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:19:27,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2019-09-05 12:19:27,360 INFO L454 AbstractCegarLoop]: Interpolant automaton has 109 states [2019-09-05 12:19:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2019-09-05 12:19:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=11557, Unknown=0, NotChecked=0, Total=11772 [2019-09-05 12:19:27,361 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 109 states. [2019-09-05 12:19:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:19:35,159 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2019-09-05 12:19:35,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2019-09-05 12:19:35,159 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 116 [2019-09-05 12:19:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:19:35,160 INFO L225 Difference]: With dead ends: 121 [2019-09-05 12:19:35,160 INFO L226 Difference]: Without dead ends: 118 [2019-09-05 12:19:35,161 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=219, Invalid=11771, Unknown=0, NotChecked=0, Total=11990 [2019-09-05 12:19:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-05 12:19:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-09-05 12:19:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-05 12:19:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2019-09-05 12:19:35,170 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2019-09-05 12:19:35,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:19:35,170 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2019-09-05 12:19:35,170 INFO L476 AbstractCegarLoop]: Interpolant automaton has 109 states. [2019-09-05 12:19:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2019-09-05 12:19:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-05 12:19:35,171 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:19:35,171 INFO L399 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:19:35,171 INFO L418 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:19:35,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:19:35,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1352443712, now seen corresponding path program 101 times [2019-09-05 12:19:35,171 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:19:35,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:19:35,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:35,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:19:35,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:35,179 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:19:35,179 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:19:35,179 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:19:35,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:19:35,967 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2019-09-05 12:19:35,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:19:35,974 WARN L254 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 435 conjunts are in the unsatisfiable core [2019-09-05 12:19:35,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:19:41,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:19:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:19:41,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:19:41,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2019-09-05 12:19:41,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-09-05 12:19:41,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-09-05 12:19:41,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=11773, Unknown=0, NotChecked=0, Total=11990 [2019-09-05 12:19:41,492 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 110 states. [2019-09-05 12:19:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:19:49,522 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2019-09-05 12:19:49,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2019-09-05 12:19:49,523 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 117 [2019-09-05 12:19:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:19:49,524 INFO L225 Difference]: With dead ends: 122 [2019-09-05 12:19:49,524 INFO L226 Difference]: Without dead ends: 119 [2019-09-05 12:19:49,524 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=221, Invalid=11989, Unknown=0, NotChecked=0, Total=12210 [2019-09-05 12:19:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-09-05 12:19:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2019-09-05 12:19:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-09-05 12:19:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2019-09-05 12:19:49,533 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2019-09-05 12:19:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:19:49,534 INFO L475 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2019-09-05 12:19:49,534 INFO L476 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-09-05 12:19:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2019-09-05 12:19:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-05 12:19:49,534 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:19:49,534 INFO L399 BasicCegarLoop]: trace histogram [102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:19:49,534 INFO L418 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:19:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:19:49,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1023855430, now seen corresponding path program 102 times [2019-09-05 12:19:49,535 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:19:49,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:19:49,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:49,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:19:49,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:49,542 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:19:49,542 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:19:49,542 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:19:49,551 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:20:10,810 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2019-09-05 12:20:10,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:20:10,819 WARN L254 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 439 conjunts are in the unsatisfiable core [2019-09-05 12:20:10,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:20:16,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:20:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:20:16,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:20:16,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2019-09-05 12:20:16,333 INFO L454 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-09-05 12:20:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-09-05 12:20:16,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=11991, Unknown=0, NotChecked=0, Total=12210 [2019-09-05 12:20:16,334 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 111 states. [2019-09-05 12:20:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:20:24,409 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2019-09-05 12:20:24,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-09-05 12:20:24,409 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 118 [2019-09-05 12:20:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:20:24,410 INFO L225 Difference]: With dead ends: 123 [2019-09-05 12:20:24,410 INFO L226 Difference]: Without dead ends: 120 [2019-09-05 12:20:24,413 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=223, Invalid=12209, Unknown=0, NotChecked=0, Total=12432 [2019-09-05 12:20:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-09-05 12:20:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2019-09-05 12:20:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-09-05 12:20:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2019-09-05 12:20:24,424 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2019-09-05 12:20:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:20:24,424 INFO L475 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2019-09-05 12:20:24,425 INFO L476 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-09-05 12:20:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2019-09-05 12:20:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-05 12:20:24,427 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:20:24,427 INFO L399 BasicCegarLoop]: trace histogram [103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:20:24,427 INFO L418 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:20:24,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:20:24,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1674684800, now seen corresponding path program 103 times [2019-09-05 12:20:24,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:20:24,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:20:24,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:24,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:20:24,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:24,433 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:20:24,433 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:20:24,434 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:20:24,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:20:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:20:25,037 WARN L254 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 443 conjunts are in the unsatisfiable core [2019-09-05 12:20:25,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:20:30,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:20:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:20:30,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:20:30,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2019-09-05 12:20:30,691 INFO L454 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-09-05 12:20:30,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-09-05 12:20:30,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=12211, Unknown=0, NotChecked=0, Total=12432 [2019-09-05 12:20:30,692 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 112 states. [2019-09-05 12:20:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:20:38,985 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2019-09-05 12:20:38,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2019-09-05 12:20:38,985 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 119 [2019-09-05 12:20:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:20:38,986 INFO L225 Difference]: With dead ends: 124 [2019-09-05 12:20:38,986 INFO L226 Difference]: Without dead ends: 121 [2019-09-05 12:20:38,987 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=225, Invalid=12431, Unknown=0, NotChecked=0, Total=12656 [2019-09-05 12:20:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-09-05 12:20:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2019-09-05 12:20:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-05 12:20:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2019-09-05 12:20:38,998 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2019-09-05 12:20:38,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:20:38,998 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2019-09-05 12:20:38,998 INFO L476 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-09-05 12:20:38,998 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2019-09-05 12:20:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-05 12:20:38,999 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:20:38,999 INFO L399 BasicCegarLoop]: trace histogram [104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:20:38,999 INFO L418 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:20:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:20:38,999 INFO L82 PathProgramCache]: Analyzing trace with hash 375558790, now seen corresponding path program 104 times [2019-09-05 12:20:38,999 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:20:39,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:20:39,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:39,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:20:39,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:39,005 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:20:39,005 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:20:39,005 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:20:39,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:20:39,624 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:20:39,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:20:39,631 WARN L254 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 447 conjunts are in the unsatisfiable core [2019-09-05 12:20:39,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:20:45,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:20:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:20:45,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:20:45,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2019-09-05 12:20:45,293 INFO L454 AbstractCegarLoop]: Interpolant automaton has 113 states [2019-09-05 12:20:45,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2019-09-05 12:20:45,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=12433, Unknown=0, NotChecked=0, Total=12656 [2019-09-05 12:20:45,293 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 113 states. [2019-09-05 12:20:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:20:53,654 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2019-09-05 12:20:53,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2019-09-05 12:20:53,654 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 120 [2019-09-05 12:20:53,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:20:53,655 INFO L225 Difference]: With dead ends: 125 [2019-09-05 12:20:53,655 INFO L226 Difference]: Without dead ends: 122 [2019-09-05 12:20:53,656 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=227, Invalid=12655, Unknown=0, NotChecked=0, Total=12882 [2019-09-05 12:20:53,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-09-05 12:20:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2019-09-05 12:20:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-05 12:20:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2019-09-05 12:20:53,665 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2019-09-05 12:20:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:20:53,665 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2019-09-05 12:20:53,665 INFO L476 AbstractCegarLoop]: Interpolant automaton has 113 states. [2019-09-05 12:20:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2019-09-05 12:20:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-05 12:20:53,666 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:20:53,666 INFO L399 BasicCegarLoop]: trace histogram [105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:20:53,666 INFO L418 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:20:53,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:20:53,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1242641856, now seen corresponding path program 105 times [2019-09-05 12:20:53,667 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:20:53,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:20:53,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:53,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:20:53,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:53,673 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:20:53,673 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:20:53,673 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:20:53,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:21:25,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2019-09-05 12:21:25,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:25,915 WARN L254 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 451 conjunts are in the unsatisfiable core [2019-09-05 12:21:25,917 INFO L279 TraceCheckSpWp]: Computing forward predicates...