java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:05:19,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:05:19,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:05:19,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 12:05:19,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 12:05:19,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 12:05:19,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 12:05:19,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 12:05:19,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 12:05:19,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 12:05:19,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 12:05:19,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 12:05:19,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:05:19,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:05:19,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:05:19,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:05:19,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:05:19,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:05:19,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:05:19,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:05:19,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:05:19,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:05:19,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:05:19,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:05:19,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:05:19,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:05:19,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:05:19,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:05:19,848 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 12:05:19,867 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:05:19,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:05:19,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:05:19,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:05:19,869 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:05:19,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:05:19,870 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:05:19,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:05:19,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:05:19,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:05:19,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:05:19,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:05:19,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:05:19,871 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:05:19,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:05:19,872 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:05:19,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:05:19,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:05:19,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:05:19,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:05:19,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:05:19,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:05:19,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:05:19,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:05:19,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:05:19,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:05:19,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:05:19,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:05:19,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:05:19,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:05:19,942 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:05:19,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:05:19,950 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:05:19,950 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:05:19,951 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-09-05 12:05:20,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af58eda4b/fffa8f1d64164e2d8a341ffb495bd72d/FLAGc6dd4157f [2019-09-05 12:05:20,440 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:05:20,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-09-05 12:05:20,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af58eda4b/fffa8f1d64164e2d8a341ffb495bd72d/FLAGc6dd4157f [2019-09-05 12:05:20,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af58eda4b/fffa8f1d64164e2d8a341ffb495bd72d [2019-09-05 12:05:20,817 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:05:20,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:05:20,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:05:20,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:05:20,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:05:20,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:05:20" (1/1) ... [2019-09-05 12:05:20,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da04a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:20, skipping insertion in model container [2019-09-05 12:05:20,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:05:20" (1/1) ... [2019-09-05 12:05:20,836 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:05:20,854 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:05:21,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:05:21,040 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:05:21,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:05:21,067 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:05:21,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:21 WrapperNode [2019-09-05 12:05:21,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:05:21,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:05:21,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:05:21,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:05:21,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:21" (1/1) ... [2019-09-05 12:05:21,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:21" (1/1) ... [2019-09-05 12:05:21,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:21" (1/1) ... [2019-09-05 12:05:21,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:21" (1/1) ... [2019-09-05 12:05:21,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:21" (1/1) ... [2019-09-05 12:05:21,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:21" (1/1) ... [2019-09-05 12:05:21,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:21" (1/1) ... [2019-09-05 12:05:21,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:05:21,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:05:21,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:05:21,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:05:21,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:21" (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 12:05:21,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:05:21,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:05:21,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:05:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:05:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 12:05:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:05:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:05:21,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:05:21,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:05:21,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:05:21,408 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:05:21,409 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-05 12:05:21,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:05:21 BoogieIcfgContainer [2019-09-05 12:05:21,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:05:21,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:05:21,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:05:21,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:05:21,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:05:20" (1/3) ... [2019-09-05 12:05:21,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4710a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:05:21, skipping insertion in model container [2019-09-05 12:05:21,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:05:21" (2/3) ... [2019-09-05 12:05:21,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4710a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:05:21, skipping insertion in model container [2019-09-05 12:05:21,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:05:21" (3/3) ... [2019-09-05 12:05:21,417 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-09-05 12:05:21,426 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:05:21,432 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:05:21,446 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:05:21,476 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:05:21,476 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:05:21,477 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:05:21,477 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:05:21,477 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:05:21,477 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:05:21,477 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:05:21,477 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:05:21,478 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:05:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-09-05 12:05:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 12:05:21,501 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:21,502 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:21,504 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:21,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:21,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-09-05 12:05:21,509 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:21,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:21,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:21,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:21,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:21,584 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:21,584 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:21,584 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) [2019-09-05 12:05:21,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:21,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-05 12:05:21,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:05:21,703 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:05:21,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-05 12:05:21,708 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-05 12:05:21,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-05 12:05:21,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-05 12:05:21,736 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-09-05 12:05:21,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:21,949 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-05 12:05:21,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-05 12:05:21,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-09-05 12:05:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:21,964 INFO L225 Difference]: With dead ends: 26 [2019-09-05 12:05:21,964 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 12:05:21,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-05 12:05:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 12:05:22,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 12:05:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 12:05:22,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-05 12:05:22,017 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-05 12:05:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:22,018 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-05 12:05:22,019 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-05 12:05:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-05 12:05:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 12:05:22,020 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:22,021 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:22,022 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:22,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:22,023 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-09-05 12:05:22,023 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:22,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:22,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:22,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:22,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:22,056 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:22,056 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:22,056 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) [2019-09-05 12:05:22,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:22,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 12:05:22,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:22,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:22,186 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 12:05:22,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:22,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-05 12:05:22,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:05:22,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:05:22,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:05:22,194 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-05 12:05:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:22,258 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-05 12:05:22,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:05:22,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-05 12:05:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:22,260 INFO L225 Difference]: With dead ends: 17 [2019-09-05 12:05:22,260 INFO L226 Difference]: Without dead ends: 14 [2019-09-05 12:05:22,261 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:05:22,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-05 12:05:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-05 12:05:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-05 12:05:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-05 12:05:22,271 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-05 12:05:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:22,272 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-05 12:05:22,272 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:05:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-05 12:05:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 12:05:22,274 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:22,275 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:22,276 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:22,276 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-09-05 12:05:22,276 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:22,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:22,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:22,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:22,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:22,306 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:22,307 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:22,307 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 12:05:22,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:05:22,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:05:22,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:22,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 12:05:22,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:22,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:22,417 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 12:05:22,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:22,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-05 12:05:22,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:05:22,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:05:22,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:05:22,425 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-09-05 12:05:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:22,487 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-05 12:05:22,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:05:22,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-09-05 12:05:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:22,489 INFO L225 Difference]: With dead ends: 18 [2019-09-05 12:05:22,489 INFO L226 Difference]: Without dead ends: 15 [2019-09-05 12:05:22,490 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:05:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-05 12:05:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-05 12:05:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-05 12:05:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-05 12:05:22,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-05 12:05:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:22,502 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-05 12:05:22,503 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:05:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-05 12:05:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-05 12:05:22,504 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:22,504 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:22,504 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:22,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-09-05 12:05:22,506 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:22,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:22,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:22,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:22,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:22,532 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:22,532 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:22,532 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) [2019-09-05 12:05:22,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:22,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-05 12:05:22,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:22,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:05:22,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:22,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:22,667 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 12:05:22,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:22,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-05 12:05:22,674 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:05:22,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:05:22,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:05:22,676 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-09-05 12:05:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:22,738 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-05 12:05:22,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:05:22,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-09-05 12:05:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:22,740 INFO L225 Difference]: With dead ends: 19 [2019-09-05 12:05:22,740 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 12:05:22,741 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:05:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 12:05:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-05 12:05:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-05 12:05:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-05 12:05:22,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-05 12:05:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:22,751 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-05 12:05:22,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:05:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-05 12:05:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-05 12:05:22,754 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:22,755 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:22,755 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:22,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:22,755 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-09-05 12:05:22,756 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:22,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:22,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:22,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:22,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:22,779 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:22,779 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:22,779 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 12:05:22,799 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 12:05:22,862 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:05:22,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:22,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-05 12:05:22,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:22,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:22,970 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 12:05:22,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:22,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:05:22,975 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:05:22,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:05:22,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:05:22,976 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-09-05 12:05:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:23,049 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-05 12:05:23,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:05:23,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-09-05 12:05:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:23,050 INFO L225 Difference]: With dead ends: 20 [2019-09-05 12:05:23,050 INFO L226 Difference]: Without dead ends: 17 [2019-09-05 12:05:23,051 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:05:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-05 12:05:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-05 12:05:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-05 12:05:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-05 12:05:23,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-05 12:05:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:23,056 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-05 12:05:23,056 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:05:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-05 12:05:23,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 12:05:23,057 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:23,057 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:23,058 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-09-05 12:05:23,058 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:23,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:23,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:23,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:23,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:23,068 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:23,068 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:23,068 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:23,091 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:05:23,108 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-05 12:05:23,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:23,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-05 12:05:23,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:23,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:23,188 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 12:05:23,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:23,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:05:23,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:05:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:05:23,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:05:23,193 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-09-05 12:05:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:23,341 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-05 12:05:23,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:05:23,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-09-05 12:05:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:23,342 INFO L225 Difference]: With dead ends: 21 [2019-09-05 12:05:23,343 INFO L226 Difference]: Without dead ends: 18 [2019-09-05 12:05:23,343 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:05:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-05 12:05:23,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-05 12:05:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-05 12:05:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-05 12:05:23,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-09-05 12:05:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:23,348 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-05 12:05:23,348 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:05:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-05 12:05:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-05 12:05:23,349 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:23,349 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:23,349 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-09-05 12:05:23,350 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:23,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:23,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:23,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:23,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:23,360 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:23,361 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:23,361 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) [2019-09-05 12:05:23,385 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:23,404 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-05 12:05:23,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:23,406 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-05 12:05:23,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:23,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:23,525 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 12:05:23,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:23,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:05:23,529 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:05:23,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:05:23,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:05:23,530 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-09-05 12:05:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:23,618 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-05 12:05:23,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:05:23,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-09-05 12:05:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:23,619 INFO L225 Difference]: With dead ends: 22 [2019-09-05 12:05:23,619 INFO L226 Difference]: Without dead ends: 19 [2019-09-05 12:05:23,620 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 12:05:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-05 12:05:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-05 12:05:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-05 12:05:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-09-05 12:05:23,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-09-05 12:05:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:23,624 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-09-05 12:05:23,624 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:05:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-09-05 12:05:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-05 12:05:23,625 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:23,625 INFO L399 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:23,626 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:23,626 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-09-05 12:05:23,626 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:23,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:23,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:23,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:23,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:23,636 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:23,637 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:23,637 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 12:05:23,654 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 12:05:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:23,672 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-05 12:05:23,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:23,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:23,801 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 12:05:23,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:23,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-05 12:05:23,806 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:05:23,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:05:23,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:05:23,808 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-09-05 12:05:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:23,924 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-09-05 12:05:23,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:05:23,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-09-05 12:05:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:23,925 INFO L225 Difference]: With dead ends: 23 [2019-09-05 12:05:23,926 INFO L226 Difference]: Without dead ends: 20 [2019-09-05 12:05:23,926 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 12:05:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-05 12:05:23,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-05 12:05:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-05 12:05:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-05 12:05:23,931 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-09-05 12:05:23,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:23,932 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-05 12:05:23,932 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:05:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-05 12:05:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:05:23,933 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:23,933 INFO L399 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:23,934 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:23,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-09-05 12:05:23,934 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:23,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:23,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:23,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:23,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:23,945 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:23,946 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:23,946 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:23,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:05:23,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:05:23,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:23,987 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-05 12:05:23,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:24,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:24,167 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 12:05:24,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:24,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-05 12:05:24,171 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 12:05:24,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 12:05:24,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:05:24,172 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-09-05 12:05:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:24,326 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-09-05 12:05:24,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 12:05:24,326 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-09-05 12:05:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:24,327 INFO L225 Difference]: With dead ends: 24 [2019-09-05 12:05:24,327 INFO L226 Difference]: Without dead ends: 21 [2019-09-05 12:05:24,328 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 12:05:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-05 12:05:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-05 12:05:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-05 12:05:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-09-05 12:05:24,332 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-09-05 12:05:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:24,333 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-09-05 12:05:24,333 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 12:05:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-09-05 12:05:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-05 12:05:24,334 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:24,334 INFO L399 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:24,334 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:24,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:24,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-09-05 12:05:24,335 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:24,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:24,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:24,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:24,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:24,345 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:24,345 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:24,345 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 12:05:24,363 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 12:05:24,388 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-05 12:05:24,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:24,390 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-05 12:05:24,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:24,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:24,545 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 12:05:24,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:24,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:05:24,548 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:05:24,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:05:24,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:05:24,549 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-09-05 12:05:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:24,669 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-09-05 12:05:24,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:05:24,669 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-09-05 12:05:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:24,670 INFO L225 Difference]: With dead ends: 25 [2019-09-05 12:05:24,670 INFO L226 Difference]: Without dead ends: 22 [2019-09-05 12:05:24,670 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 12:05:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-05 12:05:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-05 12:05:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-05 12:05:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-09-05 12:05:24,676 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-09-05 12:05:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:24,676 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-09-05 12:05:24,676 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:05:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-09-05 12:05:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-05 12:05:24,677 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:24,677 INFO L399 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:24,677 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:24,678 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-09-05 12:05:24,678 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:24,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:24,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:24,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:24,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:24,688 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:24,688 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:24,688 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) [2019-09-05 12:05:24,702 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:24,812 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:05:24,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:24,814 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-05 12:05:24,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:24,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:24,986 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 12:05:24,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:24,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-05 12:05:24,991 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:05:24,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:05:24,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:05:24,992 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-09-05 12:05:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:25,132 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-05 12:05:25,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:05:25,132 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-09-05 12:05:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:25,133 INFO L225 Difference]: With dead ends: 26 [2019-09-05 12:05:25,133 INFO L226 Difference]: Without dead ends: 23 [2019-09-05 12:05:25,133 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 12:05:25,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-05 12:05:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-05 12:05:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-05 12:05:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-09-05 12:05:25,138 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-09-05 12:05:25,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:25,139 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-09-05 12:05:25,139 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:05:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-09-05 12:05:25,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-05 12:05:25,140 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:25,140 INFO L399 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:25,140 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:25,140 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-09-05 12:05:25,140 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:25,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:25,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:25,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:25,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:25,150 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:25,151 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:25,151 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 12:05:25,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:05:25,198 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-05 12:05:25,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:25,200 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-05 12:05:25,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:25,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:25,414 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 12:05:25,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:25,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-05 12:05:25,419 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:05:25,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:05:25,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:05:25,420 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-09-05 12:05:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:25,613 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-05 12:05:25,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:05:25,614 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-09-05 12:05:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:25,615 INFO L225 Difference]: With dead ends: 27 [2019-09-05 12:05:25,615 INFO L226 Difference]: Without dead ends: 24 [2019-09-05 12:05:25,615 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:05:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-05 12:05:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-05 12:05:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-05 12:05:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-05 12:05:25,620 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-09-05 12:05:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:25,621 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-05 12:05:25,621 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:05:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-05 12:05:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-05 12:05:25,622 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:25,622 INFO L399 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:25,622 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:25,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:25,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-09-05 12:05:25,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:25,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:25,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:25,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:25,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:25,632 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:25,632 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:25,633 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 12:05:25,645 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 12:05:25,670 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-05 12:05:25,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:25,672 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-05 12:05:25,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:25,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:25,878 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 12:05:25,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:25,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-05 12:05:25,881 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:05:25,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:05:25,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:05:25,882 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-09-05 12:05:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:26,062 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-05 12:05:26,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:05:26,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-09-05 12:05:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:26,063 INFO L225 Difference]: With dead ends: 28 [2019-09-05 12:05:26,063 INFO L226 Difference]: Without dead ends: 25 [2019-09-05 12:05:26,064 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 12:05:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-05 12:05:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-05 12:05:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-05 12:05:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-09-05 12:05:26,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-09-05 12:05:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:26,069 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-09-05 12:05:26,069 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:05:26,069 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-09-05 12:05:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-05 12:05:26,070 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:26,070 INFO L399 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:26,070 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:26,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:26,071 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-09-05 12:05:26,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:26,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:26,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:26,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:26,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:26,080 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:26,080 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:26,081 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:26,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:26,123 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-05 12:05:26,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:26,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:26,325 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 12:05:26,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:26,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-05 12:05:26,329 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-05 12:05:26,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-05 12:05:26,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:05:26,330 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-09-05 12:05:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:26,527 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-09-05 12:05:26,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:05:26,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-09-05 12:05:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:26,529 INFO L225 Difference]: With dead ends: 29 [2019-09-05 12:05:26,529 INFO L226 Difference]: Without dead ends: 26 [2019-09-05 12:05:26,529 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 12:05:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-05 12:05:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-05 12:05:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-05 12:05:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-05 12:05:26,535 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-09-05 12:05:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:26,536 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-05 12:05:26,536 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-05 12:05:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-05 12:05:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-05 12:05:26,537 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:26,537 INFO L399 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:26,537 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:26,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:26,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-09-05 12:05:26,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:26,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:26,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:26,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:26,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:26,547 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:26,548 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:26,548 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) [2019-09-05 12:05:26,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:26,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:05:26,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:26,602 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-05 12:05:26,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:26,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:26,843 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 12:05:26,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:26,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-05 12:05:26,848 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:05:26,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:05:26,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:05:26,849 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-09-05 12:05:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:27,096 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-09-05 12:05:27,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 12:05:27,098 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-09-05 12:05:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:27,098 INFO L225 Difference]: With dead ends: 30 [2019-09-05 12:05:27,099 INFO L226 Difference]: Without dead ends: 27 [2019-09-05 12:05:27,099 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 12:05:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-05 12:05:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-05 12:05:27,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-05 12:05:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-05 12:05:27,104 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-09-05 12:05:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:27,104 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-05 12:05:27,104 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:05:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-05 12:05:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-05 12:05:27,105 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:27,106 INFO L399 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:27,106 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-09-05 12:05:27,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:27,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:27,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:27,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:27,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:27,116 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:27,116 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:27,116 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) [2019-09-05 12:05:27,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:27,205 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-05 12:05:27,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:27,207 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-05 12:05:27,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:27,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Exception during sending of exit command (exit): Stream closed [2019-09-05 12:05:27,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:27,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:05:27,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:05:27,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:05:27,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:05:27,459 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-09-05 12:05:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:27,735 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-09-05 12:05:27,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:05:27,738 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-09-05 12:05:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:27,739 INFO L225 Difference]: With dead ends: 31 [2019-09-05 12:05:27,739 INFO L226 Difference]: Without dead ends: 28 [2019-09-05 12:05:27,740 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 12:05:27,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-05 12:05:27,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-05 12:05:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-05 12:05:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-05 12:05:27,745 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-09-05 12:05:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:27,746 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-05 12:05:27,746 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:05:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-05 12:05:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-05 12:05:27,747 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:27,747 INFO L399 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:27,747 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:27,748 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-09-05 12:05:27,748 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:27,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:27,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:27,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:27,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:27,757 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:27,757 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:27,757 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 12:05:27,777 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:05:27,921 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:05:27,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:27,923 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-05 12:05:27,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:28,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:28,195 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 12:05:28,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:28,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-05 12:05:28,201 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 12:05:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 12:05:28,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:05:28,202 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-09-05 12:05:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:28,512 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-09-05 12:05:28,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:05:28,513 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-09-05 12:05:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:28,513 INFO L225 Difference]: With dead ends: 32 [2019-09-05 12:05:28,513 INFO L226 Difference]: Without dead ends: 29 [2019-09-05 12:05:28,514 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:05:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-05 12:05:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-05 12:05:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-05 12:05:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-09-05 12:05:28,523 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-09-05 12:05:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:28,523 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-09-05 12:05:28,523 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 12:05:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-09-05 12:05:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 12:05:28,528 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:28,528 INFO L399 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:28,528 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:28,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-09-05 12:05:28,528 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:28,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:28,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:28,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:28,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:28,549 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:28,550 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:28,550 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) [2019-09-05 12:05:28,572 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:28,604 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-05 12:05:28,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:28,606 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-05 12:05:28,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:28,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:28,917 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 12:05:28,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:28,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-05 12:05:28,921 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:05:28,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:05:28,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:05:28,923 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-09-05 12:05:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:29,239 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-09-05 12:05:29,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-05 12:05:29,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-09-05 12:05:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:29,240 INFO L225 Difference]: With dead ends: 33 [2019-09-05 12:05:29,240 INFO L226 Difference]: Without dead ends: 30 [2019-09-05 12:05:29,241 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:05:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-05 12:05:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-05 12:05:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-05 12:05:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-09-05 12:05:29,247 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-09-05 12:05:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:29,247 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-09-05 12:05:29,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:05:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-09-05 12:05:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-05 12:05:29,248 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:29,248 INFO L399 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:29,249 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-09-05 12:05:29,249 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:29,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:29,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:29,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:29,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:29,258 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:29,259 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:29,259 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 12:05:29,283 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:05:29,319 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-05 12:05:29,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:29,321 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-05 12:05:29,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:29,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:29,643 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 12:05:29,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:29,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-05 12:05:29,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-05 12:05:29,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-05 12:05:29,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:05:29,649 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-09-05 12:05:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:30,071 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-09-05 12:05:30,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:05:30,071 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-09-05 12:05:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:30,072 INFO L225 Difference]: With dead ends: 34 [2019-09-05 12:05:30,072 INFO L226 Difference]: Without dead ends: 31 [2019-09-05 12:05:30,073 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:05:30,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-05 12:05:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-05 12:05:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-05 12:05:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-09-05 12:05:30,079 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-09-05 12:05:30,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:30,081 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-09-05 12:05:30,081 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-05 12:05:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-09-05 12:05:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-05 12:05:30,082 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:30,082 INFO L399 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:30,082 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:30,082 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-09-05 12:05:30,082 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:30,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:30,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:30,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:30,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:30,105 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:30,105 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:30,105 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 12:05:30,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:30,153 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-05 12:05:30,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:30,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:30,492 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 12:05:30,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:30,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-05 12:05:30,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:05:30,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:05:30,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:05:30,498 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-09-05 12:05:30,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:30,897 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-05 12:05:30,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-05 12:05:30,898 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-09-05 12:05:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:30,898 INFO L225 Difference]: With dead ends: 35 [2019-09-05 12:05:30,899 INFO L226 Difference]: Without dead ends: 32 [2019-09-05 12:05:30,899 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 12:05:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-05 12:05:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-05 12:05:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-05 12:05:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-09-05 12:05:30,908 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-09-05 12:05:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:30,908 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-09-05 12:05:30,909 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:05:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-09-05 12:05:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 12:05:30,911 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:30,911 INFO L399 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:30,911 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:30,912 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-09-05 12:05:30,912 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:30,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:30,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:30,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:30,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:30,934 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:30,935 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:30,935 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 12:05:30,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:05:30,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:05:30,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:30,995 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-05 12:05:30,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:31,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:31,338 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 12:05:31,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:31,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:05:31,342 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:05:31,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:05:31,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:05:31,343 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-09-05 12:05:31,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:31,785 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-09-05 12:05:31,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:05:31,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-09-05 12:05:31,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:31,786 INFO L225 Difference]: With dead ends: 36 [2019-09-05 12:05:31,787 INFO L226 Difference]: Without dead ends: 33 [2019-09-05 12:05:31,788 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 12:05:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-05 12:05:31,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-05 12:05:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-05 12:05:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-09-05 12:05:31,793 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-09-05 12:05:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:31,793 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-09-05 12:05:31,793 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:05:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-09-05 12:05:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-05 12:05:31,794 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:31,794 INFO L399 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:31,794 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:31,794 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-09-05 12:05:31,795 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:31,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:31,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:31,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:31,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:31,806 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:31,806 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:31,806 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:31,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:05:31,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-05 12:05:31,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:31,968 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-05 12:05:31,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:32,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:32,382 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 12:05:32,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:32,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-05 12:05:32,386 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:05:32,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:05:32,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:05:32,387 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-09-05 12:05:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:32,798 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-09-05 12:05:32,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-05 12:05:32,800 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-09-05 12:05:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:32,800 INFO L225 Difference]: With dead ends: 37 [2019-09-05 12:05:32,800 INFO L226 Difference]: Without dead ends: 34 [2019-09-05 12:05:32,801 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:05:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-05 12:05:32,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-05 12:05:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-05 12:05:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-05 12:05:32,806 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-09-05 12:05:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:32,807 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-05 12:05:32,807 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:05:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-05 12:05:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-05 12:05:32,807 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:32,807 INFO L399 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:32,808 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:32,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-09-05 12:05:32,808 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:32,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:32,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:32,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:32,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:32,816 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:32,816 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:32,816 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) [2019-09-05 12:05:32,834 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:33,004 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:05:33,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:33,006 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-05 12:05:33,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:33,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:33,387 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 12:05:33,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:33,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-05 12:05:33,392 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-05 12:05:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-05 12:05:33,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:05:33,393 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-09-05 12:05:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:33,873 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-09-05 12:05:33,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-05 12:05:33,873 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-09-05 12:05:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:33,874 INFO L225 Difference]: With dead ends: 38 [2019-09-05 12:05:33,874 INFO L226 Difference]: Without dead ends: 35 [2019-09-05 12:05:33,875 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:05:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-05 12:05:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-05 12:05:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-05 12:05:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-09-05 12:05:33,880 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-09-05 12:05:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:33,880 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-09-05 12:05:33,880 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-05 12:05:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-09-05 12:05:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-05 12:05:33,881 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:33,881 INFO L399 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:33,881 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:33,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-09-05 12:05:33,882 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:33,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:33,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:33,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:33,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:33,889 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:33,889 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:33,889 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 12:05:33,908 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:05:33,943 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-05 12:05:33,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:33,945 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-05 12:05:33,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:34,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:34,336 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 12:05:34,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:34,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-05 12:05:34,340 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-05 12:05:34,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-05 12:05:34,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:05:34,341 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-09-05 12:05:34,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:34,845 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-09-05 12:05:34,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-05 12:05:34,846 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-09-05 12:05:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:34,846 INFO L225 Difference]: With dead ends: 39 [2019-09-05 12:05:34,847 INFO L226 Difference]: Without dead ends: 36 [2019-09-05 12:05:34,847 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:05:34,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-05 12:05:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-05 12:05:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-05 12:05:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-05 12:05:34,853 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-09-05 12:05:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:34,853 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-05 12:05:34,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-05 12:05:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-05 12:05:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-05 12:05:34,854 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:34,854 INFO L399 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:34,854 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-09-05 12:05:34,855 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:34,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:34,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:34,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:34,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:34,863 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:34,863 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:34,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:05:34,889 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:34,960 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-05 12:05:34,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:34,962 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-05 12:05:34,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:35,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:35,466 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 12:05:35,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:35,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-05 12:05:35,469 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-05 12:05:35,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-05 12:05:35,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:05:35,470 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-09-05 12:05:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:36,054 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-09-05 12:05:36,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-05 12:05:36,054 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-09-05 12:05:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:36,055 INFO L225 Difference]: With dead ends: 40 [2019-09-05 12:05:36,055 INFO L226 Difference]: Without dead ends: 37 [2019-09-05 12:05:36,055 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-05 12:05:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-05 12:05:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-05 12:05:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-05 12:05:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-09-05 12:05:36,060 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-09-05 12:05:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:36,061 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-09-05 12:05:36,061 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-05 12:05:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-09-05 12:05:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-05 12:05:36,061 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:36,061 INFO L399 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:36,062 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-09-05 12:05:36,062 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:36,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:36,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:36,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:36,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:36,069 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:36,070 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:36,070 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) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:36,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:36,126 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-05 12:05:36,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:36,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:05:36,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:36,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-05 12:05:36,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-05 12:05:36,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-05 12:05:36,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-09-05 12:05:36,615 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-09-05 12:05:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:37,164 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-09-05 12:05:37,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-05 12:05:37,165 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-09-05 12:05:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:37,166 INFO L225 Difference]: With dead ends: 41 [2019-09-05 12:05:37,166 INFO L226 Difference]: Without dead ends: 38 [2019-09-05 12:05:37,167 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 12:05:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-05 12:05:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-05 12:05:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-05 12:05:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-05 12:05:37,172 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-09-05 12:05:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:37,173 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-05 12:05:37,173 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-05 12:05:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-05 12:05:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-05 12:05:37,173 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:37,173 INFO L399 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:37,174 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:37,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-09-05 12:05:37,174 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:37,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:37,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:37,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:37,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:37,182 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:37,182 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:37,182 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 12:05:37,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:05:37,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:05:37,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:37,284 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-05 12:05:37,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:37,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:05:37,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:37,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-05 12:05:37,778 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-05 12:05:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-05 12:05:37,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:05:37,779 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-09-05 12:05:38,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:38,367 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-05 12:05:38,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-05 12:05:38,368 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-09-05 12:05:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:38,369 INFO L225 Difference]: With dead ends: 42 [2019-09-05 12:05:38,369 INFO L226 Difference]: Without dead ends: 39 [2019-09-05 12:05:38,370 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 12:05:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-05 12:05:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-05 12:05:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-05 12:05:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-09-05 12:05:38,374 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-09-05 12:05:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:38,375 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-09-05 12:05:38,375 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-05 12:05:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-09-05 12:05:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-05 12:05:38,375 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:38,375 INFO L399 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:38,376 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:38,376 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-09-05 12:05:38,376 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:38,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:38,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:38,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:38,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:38,384 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:38,384 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:38,384 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 12:05:38,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:05:38,702 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-05 12:05:38,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:38,705 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-05 12:05:38,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:39,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:39,279 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 12:05:39,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:39,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-05 12:05:39,282 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-05 12:05:39,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-05 12:05:39,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:05:39,283 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-09-05 12:05:39,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:39,970 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-09-05 12:05:39,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-05 12:05:39,970 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-09-05 12:05:39,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:39,970 INFO L225 Difference]: With dead ends: 43 [2019-09-05 12:05:39,971 INFO L226 Difference]: Without dead ends: 40 [2019-09-05 12:05:39,971 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 12:05:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-05 12:05:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-05 12:05:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-05 12:05:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-09-05 12:05:39,976 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-09-05 12:05:39,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:39,977 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-09-05 12:05:39,977 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-05 12:05:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-09-05 12:05:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-05 12:05:39,977 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:39,977 INFO L399 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:39,977 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:39,978 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-09-05 12:05:39,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:39,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:39,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:39,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:39,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:39,985 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:39,985 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:39,985 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 12:05:40,017 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:05:40,239 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:05:40,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:40,242 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-05 12:05:40,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:40,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:40,773 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 12:05:40,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:40,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-05 12:05:40,776 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-05 12:05:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-05 12:05:40,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-09-05 12:05:40,777 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-09-05 12:05:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:41,470 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-09-05 12:05:41,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-05 12:05:41,470 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-09-05 12:05:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:41,471 INFO L225 Difference]: With dead ends: 44 [2019-09-05 12:05:41,471 INFO L226 Difference]: Without dead ends: 41 [2019-09-05 12:05:41,472 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:05:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-05 12:05:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-05 12:05:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-05 12:05:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-05 12:05:41,476 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-09-05 12:05:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:41,477 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-05 12:05:41,477 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-05 12:05:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-05 12:05:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-05 12:05:41,477 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:41,478 INFO L399 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:41,478 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:41,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:41,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-09-05 12:05:41,478 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:41,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:41,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:41,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:41,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:41,486 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:41,486 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:41,486 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) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:41,503 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:05:41,561 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-09-05 12:05:41,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:41,563 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-05 12:05:41,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:42,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:42,140 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 12:05:42,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:42,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-05 12:05:42,143 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-05 12:05:42,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-05 12:05:42,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:05:42,144 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-09-05 12:05:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:42,936 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-09-05 12:05:42,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-05 12:05:42,937 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-09-05 12:05:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:42,937 INFO L225 Difference]: With dead ends: 45 [2019-09-05 12:05:42,937 INFO L226 Difference]: Without dead ends: 42 [2019-09-05 12:05:42,938 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 12:05:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-05 12:05:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-05 12:05:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-05 12:05:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-09-05 12:05:42,942 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-09-05 12:05:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:42,942 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-09-05 12:05:42,942 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-05 12:05:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-09-05 12:05:42,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-05 12:05:42,943 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:42,943 INFO L399 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:42,943 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:42,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:42,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-09-05 12:05:42,943 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:42,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:42,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:42,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:42,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:42,951 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:42,951 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:42,951 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:05:42,987 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:05:43,116 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-05 12:05:43,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:43,119 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-05 12:05:43,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:43,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:43,711 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 12:05:43,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:43,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-05 12:05:43,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-05 12:05:43,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-05 12:05:43,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-09-05 12:05:43,715 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-09-05 12:05:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:44,532 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-09-05 12:05:44,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-05 12:05:44,532 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-09-05 12:05:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:44,533 INFO L225 Difference]: With dead ends: 46 [2019-09-05 12:05:44,533 INFO L226 Difference]: Without dead ends: 43 [2019-09-05 12:05:44,534 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-05 12:05:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-05 12:05:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-05 12:05:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-05 12:05:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-09-05 12:05:44,546 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-09-05 12:05:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:44,547 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-09-05 12:05:44,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-05 12:05:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-09-05 12:05:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-05 12:05:44,547 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:44,548 INFO L399 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:44,548 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:44,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:44,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-09-05 12:05:44,548 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:44,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:44,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:44,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:44,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:44,560 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:44,560 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:44,561 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 12:05:44,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:44,641 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-09-05 12:05:44,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:45,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:45,394 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 12:05:45,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:45,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-05 12:05:45,399 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-05 12:05:45,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-05 12:05:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-09-05 12:05:45,400 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-09-05 12:05:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:46,194 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-09-05 12:05:46,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-05 12:05:46,195 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-09-05 12:05:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:46,195 INFO L225 Difference]: With dead ends: 47 [2019-09-05 12:05:46,196 INFO L226 Difference]: Without dead ends: 44 [2019-09-05 12:05:46,197 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:05:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-05 12:05:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-05 12:05:46,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-05 12:05:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-05 12:05:46,202 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-09-05 12:05:46,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:46,202 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-05 12:05:46,203 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-05 12:05:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-05 12:05:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-05 12:05:46,203 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:46,203 INFO L399 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:46,203 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:46,204 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-09-05 12:05:46,204 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:46,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:46,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:46,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:46,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:46,215 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:46,215 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:46,216 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) [2019-09-05 12:05:46,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:46,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:05:46,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:46,278 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-09-05 12:05:46,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:46,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:46,970 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 12:05:46,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:46,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-05 12:05:46,973 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-05 12:05:46,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-05 12:05:46,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:05:46,974 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-09-05 12:05:47,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:47,858 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-09-05 12:05:47,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-05 12:05:47,858 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-09-05 12:05:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:47,859 INFO L225 Difference]: With dead ends: 48 [2019-09-05 12:05:47,859 INFO L226 Difference]: Without dead ends: 45 [2019-09-05 12:05:47,861 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 12:05:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-05 12:05:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-05 12:05:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-05 12:05:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-09-05 12:05:47,865 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-09-05 12:05:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:47,865 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-09-05 12:05:47,866 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-05 12:05:47,866 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-09-05 12:05:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-05 12:05:47,866 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:47,866 INFO L399 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:47,866 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:47,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-09-05 12:05:47,867 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:47,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:47,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:47,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:47,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:47,874 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:47,874 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:47,874 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) [2019-09-05 12:05:47,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:48,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-05 12:05:48,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:48,824 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-05 12:05:48,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:49,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:49,631 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 12:05:49,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:49,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-05 12:05:49,636 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-05 12:05:49,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-05 12:05:49,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:05:49,637 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-09-05 12:05:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:50,598 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-05 12:05:50,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-05 12:05:50,599 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-09-05 12:05:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:50,599 INFO L225 Difference]: With dead ends: 49 [2019-09-05 12:05:50,599 INFO L226 Difference]: Without dead ends: 46 [2019-09-05 12:05:50,600 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:05:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-05 12:05:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-05 12:05:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-05 12:05:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-09-05 12:05:50,605 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-09-05 12:05:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:50,605 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-09-05 12:05:50,605 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-05 12:05:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-09-05 12:05:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-05 12:05:50,606 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:50,606 INFO L399 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:50,606 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-09-05 12:05:50,607 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:50,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:50,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:50,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:50,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:50,614 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:50,615 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:50,615 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 12:05:50,629 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:05:50,903 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:05:50,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:50,906 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-09-05 12:05:50,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:51,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:51,631 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 12:05:51,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:51,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-09-05 12:05:51,634 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-05 12:05:51,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-05 12:05:51,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:05:51,636 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-09-05 12:05:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:52,658 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-09-05 12:05:52,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-05 12:05:52,659 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-09-05 12:05:52,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:52,659 INFO L225 Difference]: With dead ends: 50 [2019-09-05 12:05:52,660 INFO L226 Difference]: Without dead ends: 47 [2019-09-05 12:05:52,660 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 12:05:52,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-05 12:05:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-05 12:05:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-05 12:05:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-09-05 12:05:52,664 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-09-05 12:05:52,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:52,664 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-09-05 12:05:52,664 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-05 12:05:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-09-05 12:05:52,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-05 12:05:52,665 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:52,665 INFO L399 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:52,665 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-09-05 12:05:52,665 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:52,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:52,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:52,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:52,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:52,672 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:52,672 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:52,672 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) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:05:52,683 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:05:52,747 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-05 12:05:52,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:52,750 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-09-05 12:05:52,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:53,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:53,522 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 12:05:53,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:53,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-09-05 12:05:53,526 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-05 12:05:53,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-05 12:05:53,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:05:53,527 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-09-05 12:05:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:54,614 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-09-05 12:05:54,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-05 12:05:54,615 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-09-05 12:05:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:54,615 INFO L225 Difference]: With dead ends: 51 [2019-09-05 12:05:54,615 INFO L226 Difference]: Without dead ends: 48 [2019-09-05 12:05:54,616 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 12:05:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-05 12:05:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-05 12:05:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-05 12:05:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-05 12:05:54,621 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-09-05 12:05:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:54,622 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-05 12:05:54,622 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-05 12:05:54,622 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-05 12:05:54,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-05 12:05:54,622 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:54,622 INFO L399 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:54,623 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:54,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-09-05 12:05:54,623 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:54,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:54,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:54,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:54,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:54,630 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:54,631 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:54,631 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 12:05:54,664 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:05:54,983 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-05 12:05:54,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:54,986 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-09-05 12:05:54,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:55,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:55,772 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 12:05:55,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:55,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-05 12:05:55,778 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-05 12:05:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-05 12:05:55,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-09-05 12:05:55,779 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-09-05 12:05:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:56,845 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-09-05 12:05:56,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-05 12:05:56,845 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-09-05 12:05:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:56,846 INFO L225 Difference]: With dead ends: 52 [2019-09-05 12:05:56,846 INFO L226 Difference]: Without dead ends: 49 [2019-09-05 12:05:56,848 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-09-05 12:05:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-05 12:05:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-09-05 12:05:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-05 12:05:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-09-05 12:05:56,852 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-09-05 12:05:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:56,852 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-09-05 12:05:56,852 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-05 12:05:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-09-05 12:05:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-05 12:05:56,853 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:56,853 INFO L399 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:56,853 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:56,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-09-05 12:05:56,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:56,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:56,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:56,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:05:56,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:56,861 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:56,861 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:56,862 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 12:05:56,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:05:56,929 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-09-05 12:05:56,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:05:58,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:05:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Exception during sending of exit command (exit): Stream closed [2019-09-05 12:05:58,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:05:58,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-09-05 12:05:58,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-05 12:05:58,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-05 12:05:58,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-09-05 12:05:58,203 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-09-05 12:05:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:05:59,296 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-09-05 12:05:59,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-05 12:05:59,296 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-09-05 12:05:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:05:59,297 INFO L225 Difference]: With dead ends: 53 [2019-09-05 12:05:59,297 INFO L226 Difference]: Without dead ends: 50 [2019-09-05 12:05:59,298 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-09-05 12:05:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-05 12:05:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-05 12:05:59,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-05 12:05:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-09-05 12:05:59,304 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-09-05 12:05:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:05:59,304 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-09-05 12:05:59,304 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-05 12:05:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-09-05 12:05:59,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-05 12:05:59,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:05:59,305 INFO L399 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:05:59,305 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:05:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:05:59,306 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-09-05 12:05:59,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:05:59,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:05:59,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:59,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:05:59,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:05:59,313 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:05:59,314 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:05:59,314 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 12:05:59,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:05:59,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:05:59,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:05:59,400 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-05 12:05:59,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:00,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:00,278 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 12:06:00,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:00,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-05 12:06:00,281 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-05 12:06:00,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-05 12:06:00,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-09-05 12:06:00,282 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-09-05 12:06:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:01,531 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-09-05 12:06:01,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-05 12:06:01,531 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-09-05 12:06:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:01,532 INFO L225 Difference]: With dead ends: 54 [2019-09-05 12:06:01,533 INFO L226 Difference]: Without dead ends: 51 [2019-09-05 12:06:01,534 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 12:06:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-05 12:06:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-05 12:06:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-05 12:06:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-09-05 12:06:01,539 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-09-05 12:06:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:01,540 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-09-05 12:06:01,540 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-05 12:06:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-09-05 12:06:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-05 12:06:01,540 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:01,540 INFO L399 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:01,541 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:01,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1609218960, now seen corresponding path program 39 times [2019-09-05 12:06:01,541 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:01,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:01,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:01,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:01,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:01,548 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:01,549 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:01,549 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) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:06:01,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:06:02,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-05 12:06:02,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:02,885 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-09-05 12:06:02,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:03,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:03,813 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 12:06:03,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:03,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-09-05 12:06:03,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-05 12:06:03,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-05 12:06:03,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-09-05 12:06:03,818 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-09-05 12:06:05,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:05,116 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-09-05 12:06:05,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-05 12:06:05,117 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-09-05 12:06:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:05,118 INFO L225 Difference]: With dead ends: 55 [2019-09-05 12:06:05,118 INFO L226 Difference]: Without dead ends: 52 [2019-09-05 12:06:05,119 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-09-05 12:06:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-05 12:06:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-05 12:06:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-05 12:06:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-05 12:06:05,125 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-09-05 12:06:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:05,125 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-05 12:06:05,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-05 12:06:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-05 12:06:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-05 12:06:05,126 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:05,126 INFO L399 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:05,126 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1653757319, now seen corresponding path program 40 times [2019-09-05 12:06:05,127 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:05,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:05,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:05,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:05,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:05,135 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:05,135 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:05,135 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 12:06:05,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:06:05,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:06:05,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:05,515 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-09-05 12:06:05,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:06,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:06,453 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 12:06:06,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:06,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-09-05 12:06:06,457 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-05 12:06:06,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-05 12:06:06,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-09-05 12:06:06,459 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-09-05 12:06:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:07,761 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-09-05 12:06:07,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-05 12:06:07,767 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-09-05 12:06:07,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:07,767 INFO L225 Difference]: With dead ends: 56 [2019-09-05 12:06:07,768 INFO L226 Difference]: Without dead ends: 53 [2019-09-05 12:06:07,769 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-09-05 12:06:07,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-05 12:06:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-05 12:06:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-05 12:06:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-09-05 12:06:07,774 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-09-05 12:06:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:07,774 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-09-05 12:06:07,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-05 12:06:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-09-05 12:06:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-05 12:06:07,775 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:07,775 INFO L399 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:07,775 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:07,775 INFO L82 PathProgramCache]: Analyzing trace with hash -273193136, now seen corresponding path program 41 times [2019-09-05 12:06:07,776 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:07,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:07,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:07,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:07,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:07,783 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:07,783 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:07,783 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 12:06:07,794 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:06:07,879 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-09-05 12:06:07,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:07,883 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-09-05 12:06:07,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:08,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:08,888 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 12:06:08,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:08,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-09-05 12:06:08,891 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-05 12:06:08,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-05 12:06:08,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-09-05 12:06:08,892 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-09-05 12:06:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:10,264 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-09-05 12:06:10,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-05 12:06:10,265 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-09-05 12:06:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:10,266 INFO L225 Difference]: With dead ends: 57 [2019-09-05 12:06:10,266 INFO L226 Difference]: Without dead ends: 54 [2019-09-05 12:06:10,267 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 12:06:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-05 12:06:10,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-05 12:06:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-05 12:06:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-09-05 12:06:10,272 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-09-05 12:06:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:10,272 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-09-05 12:06:10,272 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-05 12:06:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-09-05 12:06:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-05 12:06:10,272 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:10,272 INFO L399 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:10,273 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:10,273 INFO L82 PathProgramCache]: Analyzing trace with hash 120884903, now seen corresponding path program 42 times [2019-09-05 12:06:10,273 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:10,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:10,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:10,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:10,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:10,279 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:10,280 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:10,280 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 12:06:10,290 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:06:10,749 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-09-05 12:06:10,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:10,753 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-05 12:06:10,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:11,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:11,776 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 12:06:11,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:11,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-09-05 12:06:11,780 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-05 12:06:11,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-05 12:06:11,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-09-05 12:06:11,781 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-09-05 12:06:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:13,206 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-09-05 12:06:13,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-05 12:06:13,206 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-09-05 12:06:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:13,207 INFO L225 Difference]: With dead ends: 58 [2019-09-05 12:06:13,207 INFO L226 Difference]: Without dead ends: 55 [2019-09-05 12:06:13,207 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 12:06:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-05 12:06:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-09-05 12:06:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-05 12:06:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-09-05 12:06:13,214 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-09-05 12:06:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:13,214 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-09-05 12:06:13,214 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-05 12:06:13,214 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-09-05 12:06:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-05 12:06:13,215 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:13,215 INFO L399 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:13,215 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:13,216 INFO L82 PathProgramCache]: Analyzing trace with hash -547597776, now seen corresponding path program 43 times [2019-09-05 12:06:13,216 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:13,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:13,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:13,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:13,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:13,224 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:13,224 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:13,224 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) [2019-09-05 12:06:13,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:06:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:06:13,342 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-09-05 12:06:13,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:14,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:14,461 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 12:06:14,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:14,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-09-05 12:06:14,465 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-05 12:06:14,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-05 12:06:14,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-09-05 12:06:14,466 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-09-05 12:06:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:16,000 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-09-05 12:06:16,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-05 12:06:16,000 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-09-05 12:06:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:16,000 INFO L225 Difference]: With dead ends: 59 [2019-09-05 12:06:16,001 INFO L226 Difference]: Without dead ends: 56 [2019-09-05 12:06:16,001 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 12:06:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-05 12:06:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-05 12:06:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-05 12:06:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-09-05 12:06:16,006 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-09-05 12:06:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:16,007 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-09-05 12:06:16,007 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-05 12:06:16,007 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-09-05 12:06:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-05 12:06:16,007 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:16,007 INFO L399 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:16,008 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:16,008 INFO L82 PathProgramCache]: Analyzing trace with hash 204275655, now seen corresponding path program 44 times [2019-09-05 12:06:16,008 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:16,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:16,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:16,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:06:16,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:16,016 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:16,017 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:16,017 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 12:06:16,036 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 12:06:16,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:06:16,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:16,109 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-09-05 12:06:16,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:17,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:17,396 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 12:06:17,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:17,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-09-05 12:06:17,407 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-05 12:06:17,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-05 12:06:17,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-09-05 12:06:17,407 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-09-05 12:06:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:18,983 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-09-05 12:06:18,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-05 12:06:18,984 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-09-05 12:06:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:18,984 INFO L225 Difference]: With dead ends: 60 [2019-09-05 12:06:18,984 INFO L226 Difference]: Without dead ends: 57 [2019-09-05 12:06:18,985 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-09-05 12:06:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-05 12:06:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-05 12:06:18,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-05 12:06:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-09-05 12:06:18,991 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-09-05 12:06:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:18,992 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-09-05 12:06:18,992 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-05 12:06:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-09-05 12:06:18,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-05 12:06:18,992 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:18,992 INFO L399 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:18,992 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:18,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:18,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2037515536, now seen corresponding path program 45 times [2019-09-05 12:06:18,993 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:18,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:18,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:18,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:18,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:19,000 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:19,000 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:19,000 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 12:06:19,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:06:21,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-05 12:06:21,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:21,489 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-05 12:06:21,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:22,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:22,695 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 12:06:22,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:22,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-09-05 12:06:22,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-05 12:06:22,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-05 12:06:22,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-09-05 12:06:22,699 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-09-05 12:06:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:24,374 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-09-05 12:06:24,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-05 12:06:24,374 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-09-05 12:06:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:24,375 INFO L225 Difference]: With dead ends: 61 [2019-09-05 12:06:24,375 INFO L226 Difference]: Without dead ends: 58 [2019-09-05 12:06:24,376 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 12:06:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-05 12:06:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-05 12:06:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-05 12:06:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-09-05 12:06:24,381 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-09-05 12:06:24,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:24,381 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-09-05 12:06:24,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-05 12:06:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-09-05 12:06:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-05 12:06:24,381 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:24,381 INFO L399 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:24,382 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:24,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1261590297, now seen corresponding path program 46 times [2019-09-05 12:06:24,382 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:24,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:24,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:24,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:24,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:24,388 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:24,388 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:24,388 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 12:06:24,399 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:06:24,818 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:06:24,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:24,822 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-09-05 12:06:24,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:25,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:26,025 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 12:06:26,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:26,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-09-05 12:06:26,028 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-05 12:06:26,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-05 12:06:26,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-09-05 12:06:26,029 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-09-05 12:06:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:27,697 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-09-05 12:06:27,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-05 12:06:27,698 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-09-05 12:06:27,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:27,698 INFO L225 Difference]: With dead ends: 62 [2019-09-05 12:06:27,699 INFO L226 Difference]: Without dead ends: 59 [2019-09-05 12:06:27,699 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 12:06:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-05 12:06:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-05 12:06:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-05 12:06:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-09-05 12:06:27,705 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-09-05 12:06:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:27,705 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-09-05 12:06:27,705 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-05 12:06:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-09-05 12:06:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-05 12:06:27,706 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:27,706 INFO L399 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:27,706 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:27,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:27,707 INFO L82 PathProgramCache]: Analyzing trace with hash -454656016, now seen corresponding path program 47 times [2019-09-05 12:06:27,707 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:27,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:27,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:27,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:27,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:27,714 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:27,714 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:27,715 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) [2019-09-05 12:06:27,735 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:06:27,844 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-05 12:06:27,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:27,847 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-09-05 12:06:27,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:29,088 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:29,137 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 12:06:29,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:29,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-09-05 12:06:29,140 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-05 12:06:29,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-05 12:06:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-09-05 12:06:29,141 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-09-05 12:06:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:30,957 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-09-05 12:06:30,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-05 12:06:30,957 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-09-05 12:06:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:30,958 INFO L225 Difference]: With dead ends: 63 [2019-09-05 12:06:30,959 INFO L226 Difference]: Without dead ends: 60 [2019-09-05 12:06:30,959 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-09-05 12:06:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-05 12:06:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-05 12:06:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-05 12:06:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-05 12:06:30,966 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-09-05 12:06:30,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:30,967 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-05 12:06:30,967 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-05 12:06:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-05 12:06:30,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-05 12:06:30,968 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:30,968 INFO L399 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:30,968 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:30,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1209497081, now seen corresponding path program 48 times [2019-09-05 12:06:30,968 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:30,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:30,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:30,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:30,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:30,976 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:30,976 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:30,977 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 12:06:31,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:06:31,639 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-05 12:06:31,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:31,643 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-05 12:06:31,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:32,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:32,970 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 12:06:32,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:32,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-09-05 12:06:32,974 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-05 12:06:32,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-05 12:06:32,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-09-05 12:06:32,975 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-09-05 12:06:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:34,804 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-09-05 12:06:34,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-05 12:06:34,805 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-09-05 12:06:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:34,806 INFO L225 Difference]: With dead ends: 64 [2019-09-05 12:06:34,806 INFO L226 Difference]: Without dead ends: 61 [2019-09-05 12:06:34,807 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 12:06:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-05 12:06:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-05 12:06:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-05 12:06:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-09-05 12:06:34,814 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-09-05 12:06:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:34,814 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-09-05 12:06:34,814 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-05 12:06:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-09-05 12:06:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-05 12:06:34,815 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:34,815 INFO L399 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:34,815 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:34,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1160233680, now seen corresponding path program 49 times [2019-09-05 12:06:34,816 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:34,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:34,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:34,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:34,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:34,823 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:34,824 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:34,824 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 12:06:34,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:06:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:06:34,944 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-09-05 12:06:34,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:36,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:06:36,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:36,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-09-05 12:06:36,307 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-05 12:06:36,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-05 12:06:36,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-09-05 12:06:36,308 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-09-05 12:06:38,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:38,321 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-09-05 12:06:38,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-05 12:06:38,322 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-09-05 12:06:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:38,322 INFO L225 Difference]: With dead ends: 65 [2019-09-05 12:06:38,322 INFO L226 Difference]: Without dead ends: 62 [2019-09-05 12:06:38,323 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 12:06:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-05 12:06:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-09-05 12:06:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-05 12:06:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-09-05 12:06:38,329 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-09-05 12:06:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:38,329 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-09-05 12:06:38,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-05 12:06:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-09-05 12:06:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-05 12:06:38,330 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:38,330 INFO L399 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:38,330 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:38,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1607443239, now seen corresponding path program 50 times [2019-09-05 12:06:38,331 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:38,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:38,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:38,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:06:38,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:38,339 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:38,339 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:38,339 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:06:38,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:06:38,455 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:06:38,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:38,459 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-09-05 12:06:38,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:39,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:39,913 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 12:06:39,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:39,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-09-05 12:06:39,916 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-05 12:06:39,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-05 12:06:39,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-09-05 12:06:39,916 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-09-05 12:06:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:41,862 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-09-05 12:06:41,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-05 12:06:41,862 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-09-05 12:06:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:41,863 INFO L225 Difference]: With dead ends: 66 [2019-09-05 12:06:41,864 INFO L226 Difference]: Without dead ends: 63 [2019-09-05 12:06:41,864 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-09-05 12:06:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-05 12:06:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-05 12:06:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-05 12:06:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-09-05 12:06:41,870 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-09-05 12:06:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:41,871 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-09-05 12:06:41,871 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-05 12:06:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-09-05 12:06:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-05 12:06:41,872 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:41,872 INFO L399 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:41,872 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:41,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1708929616, now seen corresponding path program 51 times [2019-09-05 12:06:41,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:41,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:41,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:41,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:41,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:41,881 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:41,881 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:41,881 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 12:06:41,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:06:46,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-09-05 12:06:46,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:46,153 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-05 12:06:46,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:47,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:47,624 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 12:06:47,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:47,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-09-05 12:06:47,628 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-05 12:06:47,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-05 12:06:47,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-09-05 12:06:47,629 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-09-05 12:06:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:49,699 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-09-05 12:06:49,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-05 12:06:49,700 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-09-05 12:06:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:49,701 INFO L225 Difference]: With dead ends: 67 [2019-09-05 12:06:49,701 INFO L226 Difference]: Without dead ends: 64 [2019-09-05 12:06:49,702 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 12:06:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-05 12:06:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-05 12:06:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-05 12:06:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-09-05 12:06:49,709 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-09-05 12:06:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:49,709 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-09-05 12:06:49,709 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-05 12:06:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-09-05 12:06:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-05 12:06:49,710 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:49,710 INFO L399 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:49,710 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1437273017, now seen corresponding path program 52 times [2019-09-05 12:06:49,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:49,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:49,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:49,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:49,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:49,716 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:49,717 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:49,717 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) [2019-09-05 12:06:49,736 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:06:50,329 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:06:50,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:50,332 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-09-05 12:06:50,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:51,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:51,843 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 12:06:51,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:51,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-09-05 12:06:51,846 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-05 12:06:51,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-05 12:06:51,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-09-05 12:06:51,847 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-09-05 12:06:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:53,987 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-09-05 12:06:53,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-05 12:06:53,987 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-09-05 12:06:53,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:53,988 INFO L225 Difference]: With dead ends: 68 [2019-09-05 12:06:53,988 INFO L226 Difference]: Without dead ends: 65 [2019-09-05 12:06:53,988 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 12:06:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-05 12:06:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-05 12:06:53,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-05 12:06:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-09-05 12:06:53,994 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-09-05 12:06:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:53,994 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-09-05 12:06:53,994 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-05 12:06:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-09-05 12:06:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-05 12:06:53,995 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:53,995 INFO L399 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:53,995 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:53,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1605853040, now seen corresponding path program 53 times [2019-09-05 12:06:53,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:53,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:53,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:53,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:53,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:54,004 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:54,004 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:54,004 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 12:06:54,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:06:54,170 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-05 12:06:54,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:54,174 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-05 12:06:54,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:06:55,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:06:55,715 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 12:06:55,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:06:55,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-09-05 12:06:55,719 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-05 12:06:55,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-05 12:06:55,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-09-05 12:06:55,719 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-09-05 12:06:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:06:57,939 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-09-05 12:06:57,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-05 12:06:57,939 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-09-05 12:06:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:06:57,940 INFO L225 Difference]: With dead ends: 69 [2019-09-05 12:06:57,940 INFO L226 Difference]: Without dead ends: 66 [2019-09-05 12:06:57,940 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 12:06:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-05 12:06:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-05 12:06:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-05 12:06:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-09-05 12:06:57,945 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-09-05 12:06:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:06:57,946 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-09-05 12:06:57,946 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-05 12:06:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-09-05 12:06:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-05 12:06:57,946 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:06:57,946 INFO L399 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:06:57,947 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:06:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:06:57,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1758100839, now seen corresponding path program 54 times [2019-09-05 12:06:57,947 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:06:57,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:06:57,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:57,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:06:57,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:06:57,955 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:06:57,955 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:06:57,955 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 12:06:57,966 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:06:59,168 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-05 12:06:59,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:06:59,174 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-09-05 12:06:59,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:00,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:07:00,794 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 12:07:00,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:07:00,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-09-05 12:07:00,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-05 12:07:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-05 12:07:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-09-05 12:07:00,798 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-09-05 12:07:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:03,185 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-09-05 12:07:03,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-05 12:07:03,186 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-09-05 12:07:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:03,186 INFO L225 Difference]: With dead ends: 70 [2019-09-05 12:07:03,186 INFO L226 Difference]: Without dead ends: 67 [2019-09-05 12:07:03,187 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2019-09-05 12:07:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-05 12:07:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-09-05 12:07:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-05 12:07:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-09-05 12:07:03,192 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-09-05 12:07:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:03,193 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-09-05 12:07:03,193 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-05 12:07:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-09-05 12:07:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-05 12:07:03,194 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:03,194 INFO L399 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:03,194 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:03,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:03,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1333511312, now seen corresponding path program 55 times [2019-09-05 12:07:03,195 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:03,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:03,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:03,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:07:03,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:03,203 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:07:03,203 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:07:03,203 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) [2019-09-05 12:07:03,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:07:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:07:03,333 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-09-05 12:07:03,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:05,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:07:05,231 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 12:07:05,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:07:05,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-09-05 12:07:05,234 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-05 12:07:05,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-05 12:07:05,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-09-05 12:07:05,235 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-09-05 12:07:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:07,672 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-09-05 12:07:07,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-05 12:07:07,672 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-09-05 12:07:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:07,673 INFO L225 Difference]: With dead ends: 71 [2019-09-05 12:07:07,673 INFO L226 Difference]: Without dead ends: 68 [2019-09-05 12:07:07,673 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-09-05 12:07:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-05 12:07:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-05 12:07:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-05 12:07:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-05 12:07:07,679 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-09-05 12:07:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:07,680 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-05 12:07:07,680 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-05 12:07:07,680 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-05 12:07:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-05 12:07:07,680 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:07,680 INFO L399 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:07,681 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1610759815, now seen corresponding path program 56 times [2019-09-05 12:07:07,681 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:07,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:07,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:07,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:07:07,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:07,689 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:07:07,690 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:07:07,690 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 12:07:07,726 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 12:07:07,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:07:07,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:07:07,845 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-09-05 12:07:07,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:09,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:07:09,583 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 12:07:09,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:07:09,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-09-05 12:07:09,586 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-05 12:07:09,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-05 12:07:09,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-09-05 12:07:09,587 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-09-05 12:07:11,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:11,969 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-09-05 12:07:11,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-05 12:07:11,970 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-09-05 12:07:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:11,971 INFO L225 Difference]: With dead ends: 72 [2019-09-05 12:07:11,971 INFO L226 Difference]: Without dead ends: 69 [2019-09-05 12:07:11,971 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-09-05 12:07:11,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-05 12:07:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-05 12:07:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-05 12:07:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-09-05 12:07:11,977 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-09-05 12:07:11,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:11,977 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-09-05 12:07:11,978 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-05 12:07:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-09-05 12:07:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-05 12:07:11,978 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:11,978 INFO L399 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:11,979 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1606115760, now seen corresponding path program 57 times [2019-09-05 12:07:11,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:11,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:11,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:11,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:07:11,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:11,990 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:07:11,990 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:07:11,990 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) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:07:12,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:07:19,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-05 12:07:19,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:07:19,051 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-05 12:07:19,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:20,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:07:20,840 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 12:07:20,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:07:20,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-09-05 12:07:20,844 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-05 12:07:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-05 12:07:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-09-05 12:07:20,845 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-09-05 12:07:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:23,375 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-09-05 12:07:23,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-05 12:07:23,375 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-09-05 12:07:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:23,376 INFO L225 Difference]: With dead ends: 73 [2019-09-05 12:07:23,377 INFO L226 Difference]: Without dead ends: 70 [2019-09-05 12:07:23,377 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2019-09-05 12:07:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-05 12:07:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-09-05 12:07:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-05 12:07:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-09-05 12:07:23,384 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-09-05 12:07:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:23,384 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-09-05 12:07:23,384 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-05 12:07:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-09-05 12:07:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-05 12:07:23,385 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:23,385 INFO L399 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:23,385 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1749956519, now seen corresponding path program 58 times [2019-09-05 12:07:23,386 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:23,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:23,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:23,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:07:23,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:23,393 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:07:23,393 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:07:23,393 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) [2019-09-05 12:07:23,410 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:07:24,028 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:07:24,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:07:24,033 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-09-05 12:07:24,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:25,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:07:25,885 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 12:07:25,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:07:25,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-09-05 12:07:25,888 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-05 12:07:25,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-05 12:07:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-09-05 12:07:25,889 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-09-05 12:07:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:28,539 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-09-05 12:07:28,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-05 12:07:28,539 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-09-05 12:07:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:28,540 INFO L225 Difference]: With dead ends: 74 [2019-09-05 12:07:28,540 INFO L226 Difference]: Without dead ends: 71 [2019-09-05 12:07:28,540 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2019-09-05 12:07:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-05 12:07:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-05 12:07:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-05 12:07:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-09-05 12:07:28,547 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-09-05 12:07:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:28,547 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-09-05 12:07:28,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-05 12:07:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-09-05 12:07:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-05 12:07:28,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:28,548 INFO L399 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:28,548 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1585985232, now seen corresponding path program 59 times [2019-09-05 12:07:28,548 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:28,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:28,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:28,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:07:28,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:28,556 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:07:28,556 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:07:28,556 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) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:07:28,574 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:07:28,763 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-05 12:07:28,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:07:28,767 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-09-05 12:07:28,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:30,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:07:30,664 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 12:07:30,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:07:30,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-09-05 12:07:30,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-05 12:07:30,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-05 12:07:30,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-09-05 12:07:30,669 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-09-05 12:07:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:33,386 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-09-05 12:07:33,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-05 12:07:33,386 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-09-05 12:07:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:33,387 INFO L225 Difference]: With dead ends: 75 [2019-09-05 12:07:33,387 INFO L226 Difference]: Without dead ends: 72 [2019-09-05 12:07:33,388 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2019-09-05 12:07:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-05 12:07:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-05 12:07:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-05 12:07:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-09-05 12:07:33,393 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-09-05 12:07:33,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:33,393 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-09-05 12:07:33,393 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-05 12:07:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-09-05 12:07:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-05 12:07:33,394 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:33,394 INFO L399 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:33,394 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:33,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1920964409, now seen corresponding path program 60 times [2019-09-05 12:07:33,394 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:33,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:33,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:33,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:07:33,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:33,402 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:07:33,402 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:07:33,402 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 12:07:33,430 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:07:35,168 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-05 12:07:35,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:07:35,176 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-09-05 12:07:35,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:37,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:07:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:07:37,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:07:37,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-09-05 12:07:37,126 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-05 12:07:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-05 12:07:37,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-09-05 12:07:37,127 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-09-05 12:07:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:39,980 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-09-05 12:07:39,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-05 12:07:39,980 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-09-05 12:07:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:39,981 INFO L225 Difference]: With dead ends: 76 [2019-09-05 12:07:39,981 INFO L226 Difference]: Without dead ends: 73 [2019-09-05 12:07:39,981 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 12:07:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-05 12:07:39,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-05 12:07:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-05 12:07:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-09-05 12:07:39,988 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-09-05 12:07:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:39,988 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-09-05 12:07:39,988 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-05 12:07:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-09-05 12:07:39,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-05 12:07:39,989 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:39,989 INFO L399 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:39,990 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:39,990 INFO L82 PathProgramCache]: Analyzing trace with hash 579582992, now seen corresponding path program 61 times [2019-09-05 12:07:39,990 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:39,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:39,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:39,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:07:39,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:39,998 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:07:39,999 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:07:39,999 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 12:07:40,017 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 12:07:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:07:40,156 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-09-05 12:07:40,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:42,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:07:42,232 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 12:07:42,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:07:42,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-09-05 12:07:42,236 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-05 12:07:42,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-05 12:07:42,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-09-05 12:07:42,236 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-09-05 12:07:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:45,093 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-09-05 12:07:45,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-09-05 12:07:45,093 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-09-05 12:07:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:45,094 INFO L225 Difference]: With dead ends: 77 [2019-09-05 12:07:45,094 INFO L226 Difference]: Without dead ends: 74 [2019-09-05 12:07:45,094 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 12:07:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-05 12:07:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-05 12:07:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-05 12:07:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-09-05 12:07:45,102 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-09-05 12:07:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:45,103 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-09-05 12:07:45,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-05 12:07:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-09-05 12:07:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-05 12:07:45,103 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:45,103 INFO L399 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:45,104 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:45,104 INFO L82 PathProgramCache]: Analyzing trace with hash 787141095, now seen corresponding path program 62 times [2019-09-05 12:07:45,104 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:45,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:45,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:45,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:07:45,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:45,112 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:07:45,112 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:07:45,112 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) [2019-09-05 12:07:45,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:07:45,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:07:45,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:07:45,275 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-09-05 12:07:45,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:07:47,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:07:47,327 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 12:07:47,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:07:47,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-09-05 12:07:47,331 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-05 12:07:47,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-05 12:07:47,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-09-05 12:07:47,332 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-09-05 12:07:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:07:50,217 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-09-05 12:07:50,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-05 12:07:50,217 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-09-05 12:07:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:07:50,218 INFO L225 Difference]: With dead ends: 78 [2019-09-05 12:07:50,218 INFO L226 Difference]: Without dead ends: 75 [2019-09-05 12:07:50,218 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-09-05 12:07:50,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-05 12:07:50,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-05 12:07:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-05 12:07:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-09-05 12:07:50,226 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-09-05 12:07:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:07:50,227 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-09-05 12:07:50,227 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-05 12:07:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-09-05 12:07:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-05 12:07:50,227 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:07:50,228 INFO L399 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:07:50,228 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:07:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:07:50,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1368492304, now seen corresponding path program 63 times [2019-09-05 12:07:50,228 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:07:50,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:07:50,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:50,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:07:50,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:07:50,237 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:07:50,237 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:07:50,237 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) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:07:50,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:08:01,992 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-05 12:08:01,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:01,998 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-05 12:08:01,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:04,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:04,182 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 12:08:04,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:04,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-09-05 12:08:04,186 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-05 12:08:04,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-05 12:08:04,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-09-05 12:08:04,187 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-09-05 12:08:07,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:07,277 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-09-05 12:08:07,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-05 12:08:07,277 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-09-05 12:08:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:07,278 INFO L225 Difference]: With dead ends: 79 [2019-09-05 12:08:07,278 INFO L226 Difference]: Without dead ends: 76 [2019-09-05 12:08:07,278 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 12:08:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-05 12:08:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-05 12:08:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-05 12:08:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-05 12:08:07,286 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-09-05 12:08:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:07,286 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-05 12:08:07,286 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-05 12:08:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-05 12:08:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-05 12:08:07,287 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:07,287 INFO L399 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:07,287 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:07,288 INFO L82 PathProgramCache]: Analyzing trace with hash 526349063, now seen corresponding path program 64 times [2019-09-05 12:08:07,288 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:07,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:07,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:07,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:07,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:07,296 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:07,296 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:07,296 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 12:08:07,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:08:08,053 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:08:08,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:08,058 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-09-05 12:08:08,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:10,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:10,274 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 12:08:10,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:10,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-09-05 12:08:10,285 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-05 12:08:10,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-05 12:08:10,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-09-05 12:08:10,286 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-09-05 12:08:13,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:13,446 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-09-05 12:08:13,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-05 12:08:13,446 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-09-05 12:08:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:13,447 INFO L225 Difference]: With dead ends: 80 [2019-09-05 12:08:13,447 INFO L226 Difference]: Without dead ends: 77 [2019-09-05 12:08:13,447 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-09-05 12:08:13,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-05 12:08:13,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-05 12:08:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-05 12:08:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-09-05 12:08:13,456 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-09-05 12:08:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:13,456 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-09-05 12:08:13,456 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-05 12:08:13,456 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-09-05 12:08:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-05 12:08:13,457 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:13,457 INFO L399 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:13,457 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:13,458 INFO L82 PathProgramCache]: Analyzing trace with hash -863110704, now seen corresponding path program 65 times [2019-09-05 12:08:13,458 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:13,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:13,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:13,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:13,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:13,466 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:13,467 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:13,467 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 12:08:13,484 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 12:08:13,747 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-05 12:08:13,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:13,751 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-09-05 12:08:13,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:16,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:16,073 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 12:08:16,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:16,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-09-05 12:08:16,076 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-05 12:08:16,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-05 12:08:16,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-09-05 12:08:16,078 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-09-05 12:08:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:19,402 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-09-05 12:08:19,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-05 12:08:19,402 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-09-05 12:08:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:19,403 INFO L225 Difference]: With dead ends: 81 [2019-09-05 12:08:19,403 INFO L226 Difference]: Without dead ends: 78 [2019-09-05 12:08:19,403 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-09-05 12:08:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-05 12:08:19,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-05 12:08:19,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-05 12:08:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-09-05 12:08:19,412 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-09-05 12:08:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:19,412 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-09-05 12:08:19,412 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-05 12:08:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-09-05 12:08:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-05 12:08:19,413 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:19,413 INFO L399 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:19,413 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:19,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:19,413 INFO L82 PathProgramCache]: Analyzing trace with hash -986690521, now seen corresponding path program 66 times [2019-09-05 12:08:19,413 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:19,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:19,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:19,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:19,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:19,421 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:19,421 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:19,421 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 12:08:19,438 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:08:22,405 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-09-05 12:08:22,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:22,410 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-09-05 12:08:22,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:24,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:24,728 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 12:08:24,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:24,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-09-05 12:08:24,732 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-05 12:08:24,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-05 12:08:24,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-09-05 12:08:24,733 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-09-05 12:08:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:27,986 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-09-05 12:08:27,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-05 12:08:27,986 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-09-05 12:08:27,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:27,987 INFO L225 Difference]: With dead ends: 82 [2019-09-05 12:08:27,987 INFO L226 Difference]: Without dead ends: 79 [2019-09-05 12:08:27,988 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 12:08:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-05 12:08:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-05 12:08:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-05 12:08:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-09-05 12:08:27,994 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-09-05 12:08:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:27,995 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-09-05 12:08:27,995 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-05 12:08:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-09-05 12:08:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-05 12:08:27,995 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:27,995 INFO L399 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:27,995 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash -522697552, now seen corresponding path program 67 times [2019-09-05 12:08:27,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:27,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:27,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:27,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:27,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:28,002 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:28,002 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:28,002 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 12:08:28,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:08:28,210 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-09-05 12:08:28,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:30,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:30,676 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 12:08:30,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:30,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-09-05 12:08:30,679 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-05 12:08:30,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-05 12:08:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-09-05 12:08:30,680 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-09-05 12:08:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:34,183 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-09-05 12:08:34,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-05 12:08:34,184 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-09-05 12:08:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:34,185 INFO L225 Difference]: With dead ends: 83 [2019-09-05 12:08:34,185 INFO L226 Difference]: Without dead ends: 80 [2019-09-05 12:08:34,185 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2019-09-05 12:08:34,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-05 12:08:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-09-05 12:08:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-05 12:08:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-09-05 12:08:34,194 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-09-05 12:08:34,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:34,195 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-09-05 12:08:34,195 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-05 12:08:34,195 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-09-05 12:08:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-05 12:08:34,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:34,196 INFO L399 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:34,196 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:34,196 INFO L82 PathProgramCache]: Analyzing trace with hash 976182599, now seen corresponding path program 68 times [2019-09-05 12:08:34,196 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:34,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:34,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:34,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:08:34,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:34,205 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:34,205 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:34,205 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 12:08:34,233 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 12:08:34,425 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:08:34,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:34,430 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-09-05 12:08:34,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:08:36,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:08:36,842 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 12:08:36,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:08:36,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-09-05 12:08:36,846 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-05 12:08:36,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-05 12:08:36,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-09-05 12:08:36,846 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-09-05 12:08:40,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:08:40,338 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-09-05 12:08:40,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-05 12:08:40,338 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-09-05 12:08:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:08:40,339 INFO L225 Difference]: With dead ends: 84 [2019-09-05 12:08:40,339 INFO L226 Difference]: Without dead ends: 81 [2019-09-05 12:08:40,340 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 12:08:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-05 12:08:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-05 12:08:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-05 12:08:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-09-05 12:08:40,348 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-09-05 12:08:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:08:40,348 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-09-05 12:08:40,348 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-05 12:08:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-09-05 12:08:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-05 12:08:40,349 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:08:40,349 INFO L399 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:08:40,349 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:08:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:08:40,349 INFO L82 PathProgramCache]: Analyzing trace with hash 196827024, now seen corresponding path program 69 times [2019-09-05 12:08:40,349 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:08:40,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:08:40,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:40,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:08:40,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:08:40,357 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:08:40,357 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:08:40,357 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 12:08:40,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:08:58,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-05 12:08:58,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:08:58,535 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-09-05 12:08:58,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:01,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:01,131 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 12:09:01,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:01,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-09-05 12:09:01,135 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-09-05 12:09:01,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-09-05 12:09:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-09-05 12:09:01,136 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-09-05 12:09:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:04,759 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-09-05 12:09:04,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-05 12:09:04,760 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-09-05 12:09:04,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:04,760 INFO L225 Difference]: With dead ends: 85 [2019-09-05 12:09:04,761 INFO L226 Difference]: Without dead ends: 82 [2019-09-05 12:09:04,761 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 12:09:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-05 12:09:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-05 12:09:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-05 12:09:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-09-05 12:09:04,770 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-09-05 12:09:04,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:04,770 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-09-05 12:09:04,770 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-09-05 12:09:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-09-05 12:09:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-05 12:09:04,771 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:04,771 INFO L399 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:04,771 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:04,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1806607975, now seen corresponding path program 70 times [2019-09-05 12:09:04,772 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:04,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:04,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:04,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:04,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:04,780 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:04,780 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:04,780 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 12:09:04,806 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:09:05,693 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:09:05,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:05,698 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-09-05 12:09:05,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:08,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:08,310 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 12:09:08,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:08,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-09-05 12:09:08,317 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-05 12:09:08,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-05 12:09:08,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-09-05 12:09:08,317 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-09-05 12:09:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:12,074 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-09-05 12:09:12,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-05 12:09:12,075 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-09-05 12:09:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:12,076 INFO L225 Difference]: With dead ends: 86 [2019-09-05 12:09:12,076 INFO L226 Difference]: Without dead ends: 83 [2019-09-05 12:09:12,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2019-09-05 12:09:12,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-05 12:09:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-05 12:09:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-05 12:09:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-09-05 12:09:12,084 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-09-05 12:09:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:12,084 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-09-05 12:09:12,084 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-09-05 12:09:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-09-05 12:09:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-05 12:09:12,084 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:12,085 INFO L399 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:12,085 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:12,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:12,085 INFO L82 PathProgramCache]: Analyzing trace with hash 170209904, now seen corresponding path program 71 times [2019-09-05 12:09:12,085 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:12,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:12,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:12,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:12,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:12,093 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:12,093 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:12,093 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 12:09:12,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:09:12,782 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-09-05 12:09:12,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:12,789 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-09-05 12:09:12,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:15,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:15,568 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 12:09:15,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:15,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-09-05 12:09:15,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-05 12:09:15,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-05 12:09:15,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-09-05 12:09:15,573 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-09-05 12:09:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:19,434 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-09-05 12:09:19,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-05 12:09:19,434 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-09-05 12:09:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:19,435 INFO L225 Difference]: With dead ends: 87 [2019-09-05 12:09:19,435 INFO L226 Difference]: Without dead ends: 84 [2019-09-05 12:09:19,436 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2019-09-05 12:09:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-05 12:09:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-05 12:09:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-05 12:09:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-05 12:09:19,443 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-09-05 12:09:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:19,443 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-05 12:09:19,443 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-05 12:09:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-05 12:09:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-05 12:09:19,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:19,444 INFO L399 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:19,444 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:19,445 INFO L82 PathProgramCache]: Analyzing trace with hash 981477255, now seen corresponding path program 72 times [2019-09-05 12:09:19,445 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:19,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:19,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:19,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:19,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:19,454 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:19,455 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:19,455 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) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:09:19,482 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:09:23,519 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-09-05 12:09:23,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:23,525 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-09-05 12:09:23,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:26,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:26,624 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 12:09:26,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:26,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-09-05 12:09:26,628 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-09-05 12:09:26,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-09-05 12:09:26,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-09-05 12:09:26,629 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-09-05 12:09:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:30,676 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-09-05 12:09:30,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-09-05 12:09:30,676 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-09-05 12:09:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:30,677 INFO L225 Difference]: With dead ends: 88 [2019-09-05 12:09:30,677 INFO L226 Difference]: Without dead ends: 85 [2019-09-05 12:09:30,678 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-09-05 12:09:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-05 12:09:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-09-05 12:09:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-05 12:09:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-09-05 12:09:30,686 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-09-05 12:09:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:30,687 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-09-05 12:09:30,687 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-09-05 12:09:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-09-05 12:09:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-05 12:09:30,687 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:30,687 INFO L399 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:30,688 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:30,688 INFO L82 PathProgramCache]: Analyzing trace with hash 360961360, now seen corresponding path program 73 times [2019-09-05 12:09:30,688 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:30,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:30,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:30,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:30,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:30,696 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:30,696 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:30,696 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 12:09:30,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:09:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:09:30,952 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-09-05 12:09:30,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:33,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:33,839 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 12:09:33,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:33,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-09-05 12:09:33,843 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-09-05 12:09:33,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-09-05 12:09:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-09-05 12:09:33,843 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-09-05 12:09:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:37,911 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-09-05 12:09:37,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-09-05 12:09:37,912 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-09-05 12:09:37,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:37,913 INFO L225 Difference]: With dead ends: 89 [2019-09-05 12:09:37,913 INFO L226 Difference]: Without dead ends: 86 [2019-09-05 12:09:37,913 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 12:09:37,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-05 12:09:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-05 12:09:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-05 12:09:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-09-05 12:09:37,920 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-09-05 12:09:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:37,920 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-09-05 12:09:37,920 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-09-05 12:09:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-09-05 12:09:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-05 12:09:37,921 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:37,921 INFO L399 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:37,921 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1695162201, now seen corresponding path program 74 times [2019-09-05 12:09:37,921 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:37,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:37,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:37,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:09:37,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:37,929 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:37,929 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:37,929 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) [2019-09-05 12:09:37,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:09:38,205 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:09:38,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:09:38,210 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-09-05 12:09:38,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:09:41,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:09:41,129 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 12:09:41,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:09:41,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-09-05 12:09:41,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-05 12:09:41,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-05 12:09:41,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-09-05 12:09:41,134 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-09-05 12:09:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:09:45,195 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-09-05 12:09:45,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-05 12:09:45,195 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-09-05 12:09:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:09:45,196 INFO L225 Difference]: With dead ends: 90 [2019-09-05 12:09:45,196 INFO L226 Difference]: Without dead ends: 87 [2019-09-05 12:09:45,196 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2019-09-05 12:09:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-05 12:09:45,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-05 12:09:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-05 12:09:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-09-05 12:09:45,211 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-09-05 12:09:45,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:09:45,212 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-09-05 12:09:45,212 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-05 12:09:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-09-05 12:09:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-05 12:09:45,212 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:09:45,212 INFO L399 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:09:45,212 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:09:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:09:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1010483152, now seen corresponding path program 75 times [2019-09-05 12:09:45,213 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:09:45,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:09:45,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:45,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:09:45,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:09:45,221 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:09:45,221 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:09:45,221 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:09:45,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:10:10,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-09-05 12:10:10,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:10,571 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-09-05 12:10:10,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:13,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:13,501 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 12:10:13,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:13,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-09-05 12:10:13,505 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-05 12:10:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-05 12:10:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-09-05 12:10:13,506 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-09-05 12:10:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:17,676 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-09-05 12:10:17,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-05 12:10:17,676 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-09-05 12:10:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:17,677 INFO L225 Difference]: With dead ends: 91 [2019-09-05 12:10:17,677 INFO L226 Difference]: Without dead ends: 88 [2019-09-05 12:10:17,678 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2019-09-05 12:10:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-05 12:10:17,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-05 12:10:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-05 12:10:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-09-05 12:10:17,685 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-09-05 12:10:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:17,685 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-09-05 12:10:17,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-05 12:10:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-09-05 12:10:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-05 12:10:17,686 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:17,686 INFO L399 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:17,686 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:17,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:17,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1260269113, now seen corresponding path program 76 times [2019-09-05 12:10:17,686 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:17,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:17,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:17,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:17,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:17,693 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:17,693 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:17,693 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 12:10:17,702 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:10:18,716 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:10:18,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:18,721 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-09-05 12:10:18,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:21,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:21,812 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 12:10:21,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:21,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-09-05 12:10:21,816 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-09-05 12:10:21,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-09-05 12:10:21,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-09-05 12:10:21,817 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-09-05 12:10:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:26,292 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-09-05 12:10:26,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-09-05 12:10:26,293 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-09-05 12:10:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:26,293 INFO L225 Difference]: With dead ends: 92 [2019-09-05 12:10:26,294 INFO L226 Difference]: Without dead ends: 89 [2019-09-05 12:10:26,294 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 12:10:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-05 12:10:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-05 12:10:26,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-05 12:10:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-09-05 12:10:26,301 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-09-05 12:10:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:26,302 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-09-05 12:10:26,302 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-09-05 12:10:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-09-05 12:10:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-05 12:10:26,302 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:26,302 INFO L399 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:26,302 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:26,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash -413699312, now seen corresponding path program 77 times [2019-09-05 12:10:26,303 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:26,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:26,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:26,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:26,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:26,308 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:26,308 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:26,309 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 12:10:26,318 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:10:26,686 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-05 12:10:26,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:26,692 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-09-05 12:10:26,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:29,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:29,875 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 12:10:29,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:29,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-09-05 12:10:29,879 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-09-05 12:10:29,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-09-05 12:10:29,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-09-05 12:10:29,880 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-09-05 12:10:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:34,336 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-09-05 12:10:34,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-09-05 12:10:34,337 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-09-05 12:10:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:34,338 INFO L225 Difference]: With dead ends: 93 [2019-09-05 12:10:34,338 INFO L226 Difference]: Without dead ends: 90 [2019-09-05 12:10:34,338 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-09-05 12:10:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-05 12:10:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-05 12:10:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-05 12:10:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-09-05 12:10:34,354 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-09-05 12:10:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:34,355 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-09-05 12:10:34,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-09-05 12:10:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-09-05 12:10:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-05 12:10:34,355 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:34,355 INFO L399 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:34,356 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:34,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:34,356 INFO L82 PathProgramCache]: Analyzing trace with hash 60160743, now seen corresponding path program 78 times [2019-09-05 12:10:34,356 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:34,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:34,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:34,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:34,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:34,365 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:34,365 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:34,366 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:10:34,378 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:10:40,507 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-09-05 12:10:40,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:40,516 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-09-05 12:10:40,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:43,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:43,936 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 12:10:43,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:43,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-09-05 12:10:43,940 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-05 12:10:43,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-05 12:10:43,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-09-05 12:10:43,941 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-09-05 12:10:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:48,666 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-09-05 12:10:48,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-05 12:10:48,667 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-09-05 12:10:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:48,667 INFO L225 Difference]: With dead ends: 94 [2019-09-05 12:10:48,667 INFO L226 Difference]: Without dead ends: 91 [2019-09-05 12:10:48,668 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2019-09-05 12:10:48,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-05 12:10:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-05 12:10:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-05 12:10:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-09-05 12:10:48,676 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-09-05 12:10:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:48,676 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-09-05 12:10:48,676 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-05 12:10:48,676 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-09-05 12:10:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-05 12:10:48,677 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:48,677 INFO L399 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:48,677 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1864920560, now seen corresponding path program 79 times [2019-09-05 12:10:48,677 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:48,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:48,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:48,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:10:48,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:48,685 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:48,685 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:48,685 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 12:10:48,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:10:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:10:49,369 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-09-05 12:10:49,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:10:52,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:10:52,749 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 12:10:52,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:10:52,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-09-05 12:10:52,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-05 12:10:52,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-05 12:10:52,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-09-05 12:10:52,754 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-09-05 12:10:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:10:57,295 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-09-05 12:10:57,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-05 12:10:57,295 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-09-05 12:10:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:10:57,296 INFO L225 Difference]: With dead ends: 95 [2019-09-05 12:10:57,296 INFO L226 Difference]: Without dead ends: 92 [2019-09-05 12:10:57,297 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 12:10:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-05 12:10:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-05 12:10:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-05 12:10:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-05 12:10:57,304 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-09-05 12:10:57,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:10:57,305 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-05 12:10:57,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-05 12:10:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-05 12:10:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-05 12:10:57,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:10:57,305 INFO L399 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:10:57,305 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:10:57,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:10:57,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1977900039, now seen corresponding path program 80 times [2019-09-05 12:10:57,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:10:57,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:10:57,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:57,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:10:57,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:10:57,314 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:10:57,314 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:10:57,314 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) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:10:57,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:10:57,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:10:57,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:10:57,622 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-09-05 12:10:57,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:00,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:00,917 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 12:11:00,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:00,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-09-05 12:11:00,921 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-09-05 12:11:00,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-09-05 12:11:00,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-09-05 12:11:00,922 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-09-05 12:11:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:05,815 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-09-05 12:11:05,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-09-05 12:11:05,815 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-09-05 12:11:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:05,817 INFO L225 Difference]: With dead ends: 96 [2019-09-05 12:11:05,817 INFO L226 Difference]: Without dead ends: 93 [2019-09-05 12:11:05,817 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 12:11:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-05 12:11:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-05 12:11:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-05 12:11:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-09-05 12:11:05,825 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-09-05 12:11:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:05,825 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-09-05 12:11:05,825 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-09-05 12:11:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-09-05 12:11:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-05 12:11:05,826 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:05,826 INFO L399 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:05,826 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:05,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:05,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1185296592, now seen corresponding path program 81 times [2019-09-05 12:11:05,826 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:05,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:05,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:05,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:05,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:05,834 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:05,835 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:05,835 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 12:11:05,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:11:42,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-09-05 12:11:42,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:42,365 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-09-05 12:11:42,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:45,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:45,759 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 12:11:45,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:45,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-09-05 12:11:45,763 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-05 12:11:45,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-05 12:11:45,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-09-05 12:11:45,763 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-09-05 12:11:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:50,710 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-09-05 12:11:50,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-09-05 12:11:50,710 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-09-05 12:11:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:50,711 INFO L225 Difference]: With dead ends: 97 [2019-09-05 12:11:50,711 INFO L226 Difference]: Without dead ends: 94 [2019-09-05 12:11:50,711 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 12:11:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-05 12:11:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-05 12:11:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-05 12:11:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-09-05 12:11:50,720 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-09-05 12:11:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:50,720 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-09-05 12:11:50,720 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-05 12:11:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-09-05 12:11:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-05 12:11:50,720 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:50,720 INFO L399 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:50,721 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:50,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1910573785, now seen corresponding path program 82 times [2019-09-05 12:11:50,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:50,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:50,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:50,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:50,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:50,727 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:50,727 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:50,727 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 12:11:50,737 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:11:51,917 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:11:51,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:51,922 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-09-05 12:11:51,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:55,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:55,364 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 12:11:55,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:55,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-09-05 12:11:55,368 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-09-05 12:11:55,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-09-05 12:11:55,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-09-05 12:11:55,369 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-09-05 12:12:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:00,509 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-09-05 12:12:00,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-05 12:12:00,509 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-09-05 12:12:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:00,510 INFO L225 Difference]: With dead ends: 98 [2019-09-05 12:12:00,510 INFO L226 Difference]: Without dead ends: 95 [2019-09-05 12:12:00,511 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 12:12:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-05 12:12:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-09-05 12:12:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-05 12:12:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-09-05 12:12:00,518 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-09-05 12:12:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:00,518 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-09-05 12:12:00,518 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-09-05 12:12:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-09-05 12:12:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-05 12:12:00,518 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:00,518 INFO L399 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:00,519 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:00,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:00,519 INFO L82 PathProgramCache]: Analyzing trace with hash 901692336, now seen corresponding path program 83 times [2019-09-05 12:12:00,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:00,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:00,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:00,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:00,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:00,527 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:00,527 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:00,527 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) [2019-09-05 12:12:00,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:00,981 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-09-05 12:12:00,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:00,987 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-09-05 12:12:00,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:04,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:04,701 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 12:12:04,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:04,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-09-05 12:12:04,707 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-05 12:12:04,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-05 12:12:04,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-09-05 12:12:04,708 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-09-05 12:12:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:10,240 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-09-05 12:12:10,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-05 12:12:10,240 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-09-05 12:12:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:10,241 INFO L225 Difference]: With dead ends: 99 [2019-09-05 12:12:10,242 INFO L226 Difference]: Without dead ends: 96 [2019-09-05 12:12:10,242 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2019-09-05 12:12:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-05 12:12:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-05 12:12:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-05 12:12:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-09-05 12:12:10,250 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-09-05 12:12:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:10,251 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-09-05 12:12:10,251 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-05 12:12:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-09-05 12:12:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-05 12:12:10,251 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:10,251 INFO L399 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:10,251 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:10,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2112371129, now seen corresponding path program 84 times [2019-09-05 12:12:10,252 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:10,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:10,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:10,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:10,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:10,259 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:10,259 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:10,259 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 12:12:10,272 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:12:17,663 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-05 12:12:17,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:17,674 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-09-05 12:12:17,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:21,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:21,425 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 12:12:21,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:21,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-09-05 12:12:21,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-05 12:12:21,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-05 12:12:21,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-09-05 12:12:21,431 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-09-05 12:12:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:26,969 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-09-05 12:12:26,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-05 12:12:26,970 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-09-05 12:12:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:26,971 INFO L225 Difference]: With dead ends: 100 [2019-09-05 12:12:26,971 INFO L226 Difference]: Without dead ends: 97 [2019-09-05 12:12:26,972 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-09-05 12:12:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-05 12:12:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-05 12:12:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-05 12:12:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-09-05 12:12:26,983 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-09-05 12:12:26,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:26,984 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-09-05 12:12:26,984 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-05 12:12:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-09-05 12:12:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-05 12:12:26,985 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:26,985 INFO L399 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:26,985 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1059058032, now seen corresponding path program 85 times [2019-09-05 12:12:26,985 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:26,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:26,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:26,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:26,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:26,995 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:26,995 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:26,995 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) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:27,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:12:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:12:27,366 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-09-05 12:12:27,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:31,098 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:31,194 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 12:12:31,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:31,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-09-05 12:12:31,199 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-09-05 12:12:31,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-09-05 12:12:31,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-09-05 12:12:31,200 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-09-05 12:12:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:36,914 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-09-05 12:12:36,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-09-05 12:12:36,915 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-09-05 12:12:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:36,916 INFO L225 Difference]: With dead ends: 101 [2019-09-05 12:12:36,916 INFO L226 Difference]: Without dead ends: 98 [2019-09-05 12:12:36,917 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2019-09-05 12:12:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-05 12:12:36,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-05 12:12:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-05 12:12:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-09-05 12:12:36,927 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-09-05 12:12:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:36,927 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-09-05 12:12:36,927 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-09-05 12:12:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-09-05 12:12:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-05 12:12:36,928 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:36,928 INFO L399 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:36,928 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1528876903, now seen corresponding path program 86 times [2019-09-05 12:12:36,929 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:36,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:36,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:36,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:12:36,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:36,937 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:36,938 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:36,938 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) [2019-09-05 12:12:36,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:37,313 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:12:37,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:37,319 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-09-05 12:12:37,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:41,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:41,271 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 12:12:41,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:41,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-09-05 12:12:41,276 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-05 12:12:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-05 12:12:41,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-09-05 12:12:41,276 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-09-05 12:12:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:47,108 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-09-05 12:12:47,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-05 12:12:47,109 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-09-05 12:12:47,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:47,110 INFO L225 Difference]: With dead ends: 102 [2019-09-05 12:12:47,110 INFO L226 Difference]: Without dead ends: 99 [2019-09-05 12:12:47,110 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2019-09-05 12:12:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-05 12:12:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-09-05 12:12:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-05 12:12:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-09-05 12:12:47,117 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-09-05 12:12:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:47,118 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-09-05 12:12:47,118 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-05 12:12:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-09-05 12:12:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-05 12:12:47,118 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:47,118 INFO L399 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:47,119 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:47,119 INFO L82 PathProgramCache]: Analyzing trace with hash 150481264, now seen corresponding path program 87 times [2019-09-05 12:12:47,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:47,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:47,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:47,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:47,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:47,128 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:47,128 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:47,128 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 12:12:47,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:13:38,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-09-05 12:13:38,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:38,593 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-09-05 12:13:38,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:42,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:42,450 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 12:13:42,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:42,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-09-05 12:13:42,455 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-05 12:13:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-05 12:13:42,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-09-05 12:13:42,455 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-09-05 12:13:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:48,265 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-09-05 12:13:48,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-05 12:13:48,265 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-09-05 12:13:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:48,266 INFO L225 Difference]: With dead ends: 103 [2019-09-05 12:13:48,266 INFO L226 Difference]: Without dead ends: 100 [2019-09-05 12:13:48,267 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 12:13:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-05 12:13:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-05 12:13:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-05 12:13:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-05 12:13:48,275 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-09-05 12:13:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:48,275 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-05 12:13:48,275 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-05 12:13:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-05 12:13:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-05 12:13:48,275 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:48,276 INFO L399 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:48,276 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash 369889415, now seen corresponding path program 88 times [2019-09-05 12:13:48,276 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:48,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:48,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:48,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:48,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:48,284 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:48,284 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:48,284 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 12:13:48,324 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:13:49,675 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:13:49,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:49,680 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-09-05 12:13:49,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:53,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:53,668 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 12:13:53,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:53,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-09-05 12:13:53,673 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-09-05 12:13:53,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-09-05 12:13:53,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-09-05 12:13:53,674 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-09-05 12:13:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:59,627 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-09-05 12:13:59,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-05 12:13:59,628 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-09-05 12:13:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:59,628 INFO L225 Difference]: With dead ends: 104 [2019-09-05 12:13:59,628 INFO L226 Difference]: Without dead ends: 101 [2019-09-05 12:13:59,629 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-09-05 12:13:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-05 12:13:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-09-05 12:13:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-05 12:13:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-09-05 12:13:59,637 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-09-05 12:13:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:59,638 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-09-05 12:13:59,638 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-09-05 12:13:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-09-05 12:13:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-05 12:13:59,638 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:59,638 INFO L399 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:59,638 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:59,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1418392496, now seen corresponding path program 89 times [2019-09-05 12:13:59,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:59,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:59,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:59,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:59,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:59,645 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:59,645 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:59,645 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 12:13:59,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:14:00,192 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-09-05 12:14:00,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:00,198 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-09-05 12:14:00,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:04,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:04,356 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 12:14:04,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:04,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-09-05 12:14:04,361 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-09-05 12:14:04,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-09-05 12:14:04,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-09-05 12:14:04,364 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-09-05 12:14:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:10,651 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-09-05 12:14:10,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-09-05 12:14:10,652 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-09-05 12:14:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:10,653 INFO L225 Difference]: With dead ends: 105 [2019-09-05 12:14:10,653 INFO L226 Difference]: Without dead ends: 102 [2019-09-05 12:14:10,653 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2019-09-05 12:14:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-05 12:14:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-09-05 12:14:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-05 12:14:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-09-05 12:14:10,661 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-09-05 12:14:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:10,661 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-09-05 12:14:10,662 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-09-05 12:14:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-09-05 12:14:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-05 12:14:10,662 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:10,662 INFO L399 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:10,662 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1020556889, now seen corresponding path program 90 times [2019-09-05 12:14:10,663 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:10,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:10,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:10,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:10,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:10,670 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:10,671 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:10,671 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 12:14:10,681 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:14:22,659 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-09-05 12:14:22,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:22,671 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-09-05 12:14:22,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:26,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:26,801 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 12:14:26,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:26,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-09-05 12:14:26,807 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-05 12:14:26,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-05 12:14:26,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-09-05 12:14:26,808 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-09-05 12:14:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:33,007 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-09-05 12:14:33,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-05 12:14:33,008 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-09-05 12:14:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:33,009 INFO L225 Difference]: With dead ends: 106 [2019-09-05 12:14:33,009 INFO L226 Difference]: Without dead ends: 103 [2019-09-05 12:14:33,009 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 12:14:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-05 12:14:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-05 12:14:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-05 12:14:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-09-05 12:14:33,019 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-09-05 12:14:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:33,019 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-09-05 12:14:33,019 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-05 12:14:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-09-05 12:14:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-05 12:14:33,020 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:33,020 INFO L399 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:33,020 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:33,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1572554960, now seen corresponding path program 91 times [2019-09-05 12:14:33,020 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:33,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:33,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:33,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:33,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:33,027 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:33,027 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:33,028 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 12:14:33,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:33,439 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-09-05 12:14:33,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:37,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:37,685 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 12:14:37,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:37,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-09-05 12:14:37,689 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-05 12:14:37,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-05 12:14:37,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-09-05 12:14:37,690 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-09-05 12:14:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:44,011 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-09-05 12:14:44,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-05 12:14:44,012 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-09-05 12:14:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:44,013 INFO L225 Difference]: With dead ends: 107 [2019-09-05 12:14:44,013 INFO L226 Difference]: Without dead ends: 104 [2019-09-05 12:14:44,014 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2019-09-05 12:14:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-05 12:14:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-05 12:14:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-05 12:14:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-09-05 12:14:44,024 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-09-05 12:14:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:44,024 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-09-05 12:14:44,025 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-05 12:14:44,025 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-09-05 12:14:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-05 12:14:44,025 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:44,025 INFO L399 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:44,026 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:44,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:44,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1504625977, now seen corresponding path program 92 times [2019-09-05 12:14:44,026 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:44,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:44,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:44,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:44,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:44,034 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:44,034 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:44,034 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 12:14:44,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:14:44,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:14:44,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:44,436 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-09-05 12:14:44,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:48,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:48,739 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 12:14:48,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:48,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-09-05 12:14:48,743 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-05 12:14:48,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-05 12:14:48,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-09-05 12:14:48,744 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-09-05 12:14:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:55,221 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-09-05 12:14:55,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-09-05 12:14:55,221 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-09-05 12:14:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:55,223 INFO L225 Difference]: With dead ends: 108 [2019-09-05 12:14:55,223 INFO L226 Difference]: Without dead ends: 105 [2019-09-05 12:14:55,224 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-09-05 12:14:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-05 12:14:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-09-05 12:14:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-05 12:14:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-09-05 12:14:55,234 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-09-05 12:14:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:55,234 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-09-05 12:14:55,235 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-05 12:14:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-09-05 12:14:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-05 12:14:55,235 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:55,235 INFO L399 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:55,236 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:55,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash 601172496, now seen corresponding path program 93 times [2019-09-05 12:14:55,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:55,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:55,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:55,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:55,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:55,244 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:55,244 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:55,244 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:14:55,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:16:06,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-09-05 12:16:06,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:06,365 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-09-05 12:16:06,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:10,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:10,842 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 12:16:10,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:10,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-09-05 12:16:10,849 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-05 12:16:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-05 12:16:10,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-09-05 12:16:10,859 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-09-05 12:16:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:17,619 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-09-05 12:16:17,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-09-05 12:16:17,620 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-09-05 12:16:17,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:17,621 INFO L225 Difference]: With dead ends: 109 [2019-09-05 12:16:17,621 INFO L226 Difference]: Without dead ends: 106 [2019-09-05 12:16:17,622 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-09-05 12:16:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-05 12:16:17,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-05 12:16:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-05 12:16:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-09-05 12:16:17,632 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-09-05 12:16:17,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:17,633 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-09-05 12:16:17,633 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-05 12:16:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-09-05 12:16:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-05 12:16:17,633 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:17,634 INFO L399 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:17,634 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:17,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1456415719, now seen corresponding path program 94 times [2019-09-05 12:16:17,634 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:17,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:17,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:17,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:17,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:17,642 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:17,643 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:17,643 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) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:16:17,653 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:16:19,179 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:16:19,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:19,185 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-09-05 12:16:19,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:23,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:23,793 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 12:16:23,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:23,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-09-05 12:16:23,798 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-05 12:16:23,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-05 12:16:23,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-09-05 12:16:23,798 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-09-05 12:16:30,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:30,585 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-09-05 12:16:30,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-09-05 12:16:30,585 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-09-05 12:16:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:30,586 INFO L225 Difference]: With dead ends: 110 [2019-09-05 12:16:30,586 INFO L226 Difference]: Without dead ends: 107 [2019-09-05 12:16:30,586 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-09-05 12:16:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-05 12:16:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-09-05 12:16:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-05 12:16:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-09-05 12:16:30,597 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-09-05 12:16:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:30,597 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-09-05 12:16:30,597 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-05 12:16:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-09-05 12:16:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-05 12:16:30,598 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:30,598 INFO L399 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:30,598 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2095815440, now seen corresponding path program 95 times [2019-09-05 12:16:30,599 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:30,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:30,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:30,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:30,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:30,607 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:30,607 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:30,608 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) [2019-09-05 12:16:30,624 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:16:31,193 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-09-05 12:16:31,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:31,199 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-09-05 12:16:31,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:35,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:35,745 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 12:16:35,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:35,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-09-05 12:16:35,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-05 12:16:35,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-05 12:16:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-09-05 12:16:35,750 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-09-05 12:16:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:42,596 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-09-05 12:16:42,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-05 12:16:42,597 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-09-05 12:16:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:42,598 INFO L225 Difference]: With dead ends: 111 [2019-09-05 12:16:42,598 INFO L226 Difference]: Without dead ends: 108 [2019-09-05 12:16:42,599 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=199, Invalid=9701, Unknown=0, NotChecked=0, Total=9900 [2019-09-05 12:16:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-05 12:16:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-05 12:16:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-05 12:16:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-05 12:16:42,610 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-09-05 12:16:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:42,610 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-05 12:16:42,610 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-05 12:16:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-05 12:16:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-05 12:16:42,611 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:42,611 INFO L399 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:42,611 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash -545831673, now seen corresponding path program 96 times [2019-09-05 12:16:42,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:42,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:42,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:42,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:42,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:42,620 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:42,620 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:42,621 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 12:16:42,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:16:57,046 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-05 12:16:57,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:57,059 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-09-05 12:16:57,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:17:01,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:17:01,632 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 12:17:01,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:17:01,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-09-05 12:17:01,636 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-05 12:17:01,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-05 12:17:01,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-09-05 12:17:01,637 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-09-05 12:17:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:17:08,621 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-09-05 12:17:08,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-05 12:17:08,622 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-09-05 12:17:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:17:08,623 INFO L225 Difference]: With dead ends: 112 [2019-09-05 12:17:08,623 INFO L226 Difference]: Without dead ends: 109 [2019-09-05 12:17:08,624 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 12:17:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-05 12:17:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-09-05 12:17:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-05 12:17:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-09-05 12:17:08,633 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-09-05 12:17:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:17:08,634 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-09-05 12:17:08,634 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-05 12:17:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-09-05 12:17:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-05 12:17:08,634 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:17:08,634 INFO L399 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:17:08,635 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:17:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:17:08,635 INFO L82 PathProgramCache]: Analyzing trace with hash 259024848, now seen corresponding path program 97 times [2019-09-05 12:17:08,635 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:17:08,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:17:08,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:08,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:17:08,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:08,643 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:17:08,643 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:17:08,643 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) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:17:08,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:17:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:17:09,114 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-09-05 12:17:09,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:17:13,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:17:13,922 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 12:17:13,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:17:13,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-09-05 12:17:13,927 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-09-05 12:17:13,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-09-05 12:17:13,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-09-05 12:17:13,927 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-09-05 12:17:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:17:21,117 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-09-05 12:17:21,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-09-05 12:17:21,117 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-09-05 12:17:21,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:17:21,118 INFO L225 Difference]: With dead ends: 113 [2019-09-05 12:17:21,118 INFO L226 Difference]: Without dead ends: 110 [2019-09-05 12:17:21,118 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=203, Invalid=10099, Unknown=0, NotChecked=0, Total=10302 [2019-09-05 12:17:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-05 12:17:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-05 12:17:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-05 12:17:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-09-05 12:17:21,126 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-09-05 12:17:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:17:21,126 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-09-05 12:17:21,126 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-09-05 12:17:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-09-05 12:17:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-05 12:17:21,127 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:17:21,127 INFO L399 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:17:21,127 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:17:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:17:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash -560226777, now seen corresponding path program 98 times [2019-09-05 12:17:21,127 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:17:21,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:17:21,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:21,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:17:21,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:21,133 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:17:21,133 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:17:21,133 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 12:17:21,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:17:21,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:17:21,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:17:21,603 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-09-05 12:17:21,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:17:26,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:17:26,293 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 12:17:26,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:17:26,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-09-05 12:17:26,297 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-09-05 12:17:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-09-05 12:17:26,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-09-05 12:17:26,298 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-09-05 12:17:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:17:33,568 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-09-05 12:17:33,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-05 12:17:33,569 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-09-05 12:17:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:17:33,570 INFO L225 Difference]: With dead ends: 114 [2019-09-05 12:17:33,570 INFO L226 Difference]: Without dead ends: 111 [2019-09-05 12:17:33,571 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-09-05 12:17:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-05 12:17:33,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-09-05 12:17:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-05 12:17:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-09-05 12:17:33,579 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-09-05 12:17:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:17:33,579 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-09-05 12:17:33,579 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-09-05 12:17:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-09-05 12:17:33,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-05 12:17:33,580 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:17:33,580 INFO L399 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:17:33,580 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:17:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:17:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash -187223376, now seen corresponding path program 99 times [2019-09-05 12:17:33,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:17:33,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:17:33,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:33,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:17:33,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:33,588 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:17:33,589 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:17:33,589 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) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:17:33,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2