java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 11:21:30,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 11:21:30,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 11:21:30,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 11:21:30,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 11:21:30,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 11:21:30,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 11:21:30,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 11:21:30,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 11:21:30,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 11:21:30,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 11:21:30,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 11:21:30,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 11:21:30,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 11:21:30,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 11:21:30,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 11:21:30,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 11:21:30,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 11:21:30,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 11:21:30,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 11:21:30,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 11:21:30,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 11:21:30,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 11:21:30,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 11:21:30,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 11:21:30,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 11:21:30,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 11:21:30,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 11:21:30,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-02 11:21:30,882 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 11:21:30,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 11:21:30,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-02 11:21:30,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-02 11:21:30,884 INFO L138 SettingsManager]: * Use SBE=true [2019-10-02 11:21:30,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 11:21:30,885 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 11:21:30,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-02 11:21:30,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 11:21:30,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 11:21:30,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 11:21:30,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 11:21:30,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 11:21:30,886 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 11:21:30,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 11:21:30,887 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-02 11:21:30,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 11:21:30,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 11:21:30,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 11:21:30,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-02 11:21:30,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-02 11:21:30,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:21:30,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 11:21:30,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 11:21:30,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-02 11:21:30,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-02 11:21:30,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 11:21:30,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-02 11:21:30,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 11:21:30,929 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 11:21:30,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 11:21:30,955 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 11:21:30,956 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 11:21:30,957 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 11:21:30,957 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-10-02 11:21:31,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bbe5ebbe/51ced6ddf22e42a1838726acad275d72/FLAG8b8864a35 [2019-10-02 11:21:31,504 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 11:21:31,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-10-02 11:21:31,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bbe5ebbe/51ced6ddf22e42a1838726acad275d72/FLAG8b8864a35 [2019-10-02 11:21:31,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bbe5ebbe/51ced6ddf22e42a1838726acad275d72 [2019-10-02 11:21:31,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 11:21:31,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 11:21:31,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 11:21:31,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 11:21:31,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 11:21:31,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:21:31" (1/1) ... [2019-10-02 11:21:31,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7278d8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:31, skipping insertion in model container [2019-10-02 11:21:31,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 11:21:31" (1/1) ... [2019-10-02 11:21:31,892 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 11:21:31,914 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 11:21:32,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:21:32,156 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 11:21:32,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 11:21:32,198 INFO L192 MainTranslator]: Completed translation [2019-10-02 11:21:32,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:32 WrapperNode [2019-10-02 11:21:32,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 11:21:32,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 11:21:32,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 11:21:32,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 11:21:32,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:32" (1/1) ... [2019-10-02 11:21:32,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:32" (1/1) ... [2019-10-02 11:21:32,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:32" (1/1) ... [2019-10-02 11:21:32,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:32" (1/1) ... [2019-10-02 11:21:32,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:32" (1/1) ... [2019-10-02 11:21:32,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:32" (1/1) ... [2019-10-02 11:21:32,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:32" (1/1) ... [2019-10-02 11:21:32,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 11:21:32,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 11:21:32,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 11:21:32,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 11:21:32,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 11:21:32,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 11:21:32,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 11:21:32,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 11:21:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 11:21:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-02 11:21:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-02 11:21:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 11:21:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 11:21:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 11:21:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 11:21:32,592 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 11:21:32,592 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-02 11:21:32,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:21:32 BoogieIcfgContainer [2019-10-02 11:21:32,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 11:21:32,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 11:21:32,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 11:21:32,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 11:21:32,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 11:21:31" (1/3) ... [2019-10-02 11:21:32,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b91c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:21:32, skipping insertion in model container [2019-10-02 11:21:32,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 11:21:32" (2/3) ... [2019-10-02 11:21:32,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b91c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:21:32, skipping insertion in model container [2019-10-02 11:21:32,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:21:32" (3/3) ... [2019-10-02 11:21:32,604 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2019-10-02 11:21:32,646 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 11:21:32,654 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 11:21:32,678 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 11:21:32,715 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-02 11:21:32,716 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 11:21:32,716 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-02 11:21:32,717 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 11:21:32,717 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 11:21:32,717 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 11:21:32,717 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 11:21:32,717 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 11:21:32,717 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 11:21:32,736 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-02 11:21:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-02 11:21:32,742 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:32,743 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:32,745 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1720236422, now seen corresponding path program 1 times [2019-10-02 11:21:32,751 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:32,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:32,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:32,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:32,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:32,858 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:32,858 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:32,858 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:32,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:21:32,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-02 11:21:32,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:33,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:33,138 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 [2019-10-02 11:21:33,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 11:21:33,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-02 11:21:33,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-02 11:21:33,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-02 11:21:33,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-02 11:21:33,172 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 9 states. [2019-10-02 11:21:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:33,358 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-10-02 11:21:33,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 11:21:33,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-02 11:21:33,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:33,373 INFO L225 Difference]: With dead ends: 41 [2019-10-02 11:21:33,374 INFO L226 Difference]: Without dead ends: 18 [2019-10-02 11:21:33,381 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:21:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-02 11:21:33,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-02 11:21:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-02 11:21:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-02 11:21:33,433 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-02 11:21:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:33,435 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-02 11:21:33,435 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-02 11:21:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-02 11:21:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-02 11:21:33,437 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:33,437 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:33,438 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:33,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1787659072, now seen corresponding path program 1 times [2019-10-02 11:21:33,439 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:33,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:33,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:33,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:33,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:33,487 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:33,487 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:33,488 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 11:21:33,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:21:33,534 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-02 11:21:33,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:33,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:33,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:33,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-02 11:21:33,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 11:21:33,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 11:21:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-02 11:21:33,711 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-10-02 11:21:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:33,833 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-02 11:21:33,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 11:21:33,833 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-10-02 11:21:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:33,835 INFO L225 Difference]: With dead ends: 22 [2019-10-02 11:21:33,835 INFO L226 Difference]: Without dead ends: 19 [2019-10-02 11:21:33,836 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:21:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-02 11:21:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-02 11:21:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-02 11:21:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-02 11:21:33,841 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-02 11:21:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:33,842 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-02 11:21:33,842 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 11:21:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-02 11:21:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-02 11:21:33,843 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:33,843 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:33,844 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:33,844 INFO L82 PathProgramCache]: Analyzing trace with hash -417206074, now seen corresponding path program 2 times [2019-10-02 11:21:33,844 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:33,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:33,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:33,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:33,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:33,860 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:33,860 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:33,860 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:33,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:21:33,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:21:33,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:33,927 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-02 11:21:33,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:34,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:34,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:34,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-02 11:21:34,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 11:21:34,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 11:21:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-02 11:21:34,101 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-10-02 11:21:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:34,215 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-02 11:21:34,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 11:21:34,216 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-10-02 11:21:34,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:34,217 INFO L225 Difference]: With dead ends: 23 [2019-10-02 11:21:34,217 INFO L226 Difference]: Without dead ends: 20 [2019-10-02 11:21:34,218 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:21:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-02 11:21:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-02 11:21:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-02 11:21:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-02 11:21:34,226 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-10-02 11:21:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:34,227 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-02 11:21:34,227 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 11:21:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-02 11:21:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-02 11:21:34,228 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:34,229 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:34,229 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash -48548864, now seen corresponding path program 3 times [2019-10-02 11:21:34,230 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:34,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:34,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:34,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:34,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:34,270 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:34,273 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:34,274 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:34,300 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:21:34,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-02 11:21:34,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:34,332 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-02 11:21:34,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:34,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:34,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:34,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-02 11:21:34,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 11:21:34,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 11:21:34,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-02 11:21:34,493 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-10-02 11:21:34,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:34,608 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-02 11:21:34,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-02 11:21:34,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-10-02 11:21:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:34,609 INFO L225 Difference]: With dead ends: 24 [2019-10-02 11:21:34,610 INFO L226 Difference]: Without dead ends: 21 [2019-10-02 11:21:34,610 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:21:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-02 11:21:34,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-02 11:21:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-02 11:21:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-02 11:21:34,615 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-10-02 11:21:34,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:34,615 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-02 11:21:34,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 11:21:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-02 11:21:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-02 11:21:34,617 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:34,617 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:34,617 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:34,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1505077242, now seen corresponding path program 4 times [2019-10-02 11:21:34,618 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:34,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:34,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:34,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:34,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:34,632 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:34,633 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:34,633 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:34,660 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:21:34,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:21:34,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:34,736 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-02 11:21:34,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:34,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:34,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:34,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-02 11:21:34,893 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 11:21:34,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 11:21:34,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-10-02 11:21:34,895 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-10-02 11:21:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:35,074 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-02 11:21:35,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 11:21:35,074 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-10-02 11:21:35,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:35,075 INFO L225 Difference]: With dead ends: 25 [2019-10-02 11:21:35,075 INFO L226 Difference]: Without dead ends: 22 [2019-10-02 11:21:35,076 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-10-02 11:21:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-02 11:21:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-02 11:21:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-02 11:21:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-02 11:21:35,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-10-02 11:21:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:35,082 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-02 11:21:35,082 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-02 11:21:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-02 11:21:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-02 11:21:35,083 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:35,084 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:35,084 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash 587183296, now seen corresponding path program 5 times [2019-10-02 11:21:35,085 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:35,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:35,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:35,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:35,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:35,098 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:35,099 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:35,099 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:35,131 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:21:35,153 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-02 11:21:35,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:35,156 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-02 11:21:35,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:35,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:35,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:35,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-02 11:21:35,329 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 11:21:35,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 11:21:35,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-02 11:21:35,330 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-10-02 11:21:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:35,504 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-02 11:21:35,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 11:21:35,504 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-10-02 11:21:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:35,505 INFO L225 Difference]: With dead ends: 26 [2019-10-02 11:21:35,505 INFO L226 Difference]: Without dead ends: 23 [2019-10-02 11:21:35,506 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-02 11:21:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-02 11:21:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-02 11:21:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-02 11:21:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-02 11:21:35,510 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-10-02 11:21:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:35,510 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-02 11:21:35,510 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-02 11:21:35,511 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-02 11:21:35,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-02 11:21:35,511 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:35,511 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:35,512 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:35,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:35,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1022750534, now seen corresponding path program 6 times [2019-10-02 11:21:35,512 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:35,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:35,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:35,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:35,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:35,528 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:35,529 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:35,529 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:35,548 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:21:35,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-02 11:21:35,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:35,576 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-02 11:21:35,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:35,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:35,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:35,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-02 11:21:35,761 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 11:21:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 11:21:35,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-02 11:21:35,762 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-10-02 11:21:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:35,924 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-02 11:21:35,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 11:21:35,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-10-02 11:21:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:35,926 INFO L225 Difference]: With dead ends: 27 [2019-10-02 11:21:35,926 INFO L226 Difference]: Without dead ends: 24 [2019-10-02 11:21:35,926 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-10-02 11:21:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-02 11:21:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-02 11:21:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-02 11:21:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-02 11:21:35,932 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-10-02 11:21:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:35,932 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-02 11:21:35,932 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-02 11:21:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-02 11:21:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-02 11:21:35,933 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:35,933 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:35,933 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:35,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:35,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1640433024, now seen corresponding path program 7 times [2019-10-02 11:21:35,934 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:35,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:35,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:35,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:35,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:35,948 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:35,948 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:35,948 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:35,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:21:35,997 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-02 11:21:35,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:36,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:36,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:36,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-02 11:21:36,207 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-02 11:21:36,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-02 11:21:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-10-02 11:21:36,208 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-10-02 11:21:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:36,416 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-02 11:21:36,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-02 11:21:36,416 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-10-02 11:21:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:36,417 INFO L225 Difference]: With dead ends: 28 [2019-10-02 11:21:36,417 INFO L226 Difference]: Without dead ends: 25 [2019-10-02 11:21:36,418 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-10-02 11:21:36,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-02 11:21:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-02 11:21:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-02 11:21:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-02 11:21:36,426 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-10-02 11:21:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:36,427 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-02 11:21:36,427 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-02 11:21:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-02 11:21:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-02 11:21:36,428 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:36,428 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:36,428 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:36,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:36,428 INFO L82 PathProgramCache]: Analyzing trace with hash -686246266, now seen corresponding path program 8 times [2019-10-02 11:21:36,428 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:36,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:36,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:36,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:36,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:36,441 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:36,442 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:36,442 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:36,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:21:36,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:21:36,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:36,495 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-02 11:21:36,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:36,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:36,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:36,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-02 11:21:36,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-02 11:21:36,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-02 11:21:36,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-10-02 11:21:36,717 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-10-02 11:21:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:36,962 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-02 11:21:36,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-02 11:21:36,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-02 11:21:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:36,963 INFO L225 Difference]: With dead ends: 29 [2019-10-02 11:21:36,963 INFO L226 Difference]: Without dead ends: 26 [2019-10-02 11:21:36,964 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-10-02 11:21:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-02 11:21:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-02 11:21:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-02 11:21:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-02 11:21:36,969 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-10-02 11:21:36,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:36,969 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-02 11:21:36,969 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-02 11:21:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-02 11:21:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-02 11:21:36,970 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:36,970 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:36,971 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:36,971 INFO L82 PathProgramCache]: Analyzing trace with hash 201139776, now seen corresponding path program 9 times [2019-10-02 11:21:36,971 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:36,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:36,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:36,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:36,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:36,984 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:36,985 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:36,985 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:37,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:21:37,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-02 11:21:37,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:37,053 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-02 11:21:37,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:37,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:37,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:37,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-02 11:21:37,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-02 11:21:37,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-02 11:21:37,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-10-02 11:21:37,340 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-10-02 11:21:37,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:37,620 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-02 11:21:37,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-02 11:21:37,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-10-02 11:21:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:37,622 INFO L225 Difference]: With dead ends: 30 [2019-10-02 11:21:37,622 INFO L226 Difference]: Without dead ends: 27 [2019-10-02 11:21:37,623 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-10-02 11:21:37,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-02 11:21:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-02 11:21:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-02 11:21:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-02 11:21:37,629 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-10-02 11:21:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:37,630 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-02 11:21:37,630 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-02 11:21:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-02 11:21:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-02 11:21:37,630 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:37,631 INFO L411 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:37,631 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:37,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1940303302, now seen corresponding path program 10 times [2019-10-02 11:21:37,631 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:37,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:37,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:37,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:37,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:37,644 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:37,644 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:37,644 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:37,664 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:21:37,824 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:21:37,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:37,826 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-02 11:21:37,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:38,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:38,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:38,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-02 11:21:38,084 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-02 11:21:38,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-02 11:21:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-02 11:21:38,085 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-10-02 11:21:38,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:38,366 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-02 11:21:38,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-02 11:21:38,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-10-02 11:21:38,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:38,368 INFO L225 Difference]: With dead ends: 31 [2019-10-02 11:21:38,368 INFO L226 Difference]: Without dead ends: 28 [2019-10-02 11:21:38,369 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-10-02 11:21:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-02 11:21:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-02 11:21:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-02 11:21:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-02 11:21:38,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-10-02 11:21:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:38,375 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-02 11:21:38,375 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-02 11:21:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-02 11:21:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-02 11:21:38,376 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:38,376 INFO L411 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:38,376 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:38,376 INFO L82 PathProgramCache]: Analyzing trace with hash 19797760, now seen corresponding path program 11 times [2019-10-02 11:21:38,377 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:38,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:38,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:38,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:38,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:38,389 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:38,389 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:38,389 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:38,419 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:21:38,447 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-02 11:21:38,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:38,450 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-02 11:21:38,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:38,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:38,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:38,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-02 11:21:38,721 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-02 11:21:38,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-02 11:21:38,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-02 11:21:38,722 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-10-02 11:21:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:39,093 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-02 11:21:39,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-02 11:21:39,094 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-10-02 11:21:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:39,095 INFO L225 Difference]: With dead ends: 32 [2019-10-02 11:21:39,095 INFO L226 Difference]: Without dead ends: 29 [2019-10-02 11:21:39,096 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-10-02 11:21:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-02 11:21:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-02 11:21:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-02 11:21:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-02 11:21:39,101 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-10-02 11:21:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:39,102 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-02 11:21:39,102 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-02 11:21:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-02 11:21:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-02 11:21:39,103 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:39,103 INFO L411 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:39,103 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:39,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:39,104 INFO L82 PathProgramCache]: Analyzing trace with hash 613668102, now seen corresponding path program 12 times [2019-10-02 11:21:39,104 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:39,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:39,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:39,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:39,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:39,117 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:39,117 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:39,117 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:39,145 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:21:39,203 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-02 11:21:39,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:39,205 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-02 11:21:39,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:39,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:39,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:39,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-02 11:21:39,559 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-02 11:21:39,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-02 11:21:39,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-10-02 11:21:39,560 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 22 states. [2019-10-02 11:21:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:39,905 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-02 11:21:39,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-02 11:21:39,906 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-10-02 11:21:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:39,907 INFO L225 Difference]: With dead ends: 33 [2019-10-02 11:21:39,907 INFO L226 Difference]: Without dead ends: 30 [2019-10-02 11:21:39,908 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2019-10-02 11:21:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-02 11:21:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-02 11:21:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-02 11:21:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-02 11:21:39,914 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-10-02 11:21:39,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:39,915 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-02 11:21:39,915 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-02 11:21:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-02 11:21:39,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-02 11:21:39,916 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:39,916 INFO L411 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:39,916 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:39,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779520, now seen corresponding path program 13 times [2019-10-02 11:21:39,917 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:39,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:39,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:39,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:39,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:39,930 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:39,930 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:39,931 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 11:21:39,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:21:40,001 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-02 11:21:40,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:40,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:40,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:40,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-02 11:21:40,318 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-02 11:21:40,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-02 11:21:40,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-10-02 11:21:40,319 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-10-02 11:21:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:40,723 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-02 11:21:40,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-02 11:21:40,723 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-10-02 11:21:40,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:40,724 INFO L225 Difference]: With dead ends: 34 [2019-10-02 11:21:40,724 INFO L226 Difference]: Without dead ends: 31 [2019-10-02 11:21:40,725 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-10-02 11:21:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-02 11:21:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-02 11:21:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-02 11:21:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-02 11:21:40,730 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-10-02 11:21:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:40,731 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-02 11:21:40,742 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-02 11:21:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-02 11:21:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-02 11:21:40,744 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:40,744 INFO L411 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:40,744 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:40,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:40,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1322527814, now seen corresponding path program 14 times [2019-10-02 11:21:40,745 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:40,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:40,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:40,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:40,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:40,758 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:40,758 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:40,759 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 11:21:40,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:40,825 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:21:40,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:40,827 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-02 11:21:40,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:41,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:41,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:41,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-02 11:21:41,138 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-02 11:21:41,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-02 11:21:41,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-10-02 11:21:41,139 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-10-02 11:21:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:41,550 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-02 11:21:41,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-02 11:21:41,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-02 11:21:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:41,552 INFO L225 Difference]: With dead ends: 35 [2019-10-02 11:21:41,552 INFO L226 Difference]: Without dead ends: 32 [2019-10-02 11:21:41,553 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-10-02 11:21:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-02 11:21:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-02 11:21:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-02 11:21:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-02 11:21:41,558 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-10-02 11:21:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:41,558 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-02 11:21:41,558 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-02 11:21:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-02 11:21:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-02 11:21:41,559 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:41,559 INFO L411 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:41,559 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:41,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1951373184, now seen corresponding path program 15 times [2019-10-02 11:21:41,560 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:41,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:41,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:41,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:41,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:41,572 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:41,572 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:41,572 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:41,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:21:41,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-02 11:21:41,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:41,767 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-10-02 11:21:41,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:42,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:42,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:42,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-02 11:21:42,169 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-02 11:21:42,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-02 11:21:42,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-10-02 11:21:42,170 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-10-02 11:21:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:42,585 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-02 11:21:42,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-02 11:21:42,593 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-02 11:21:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:42,594 INFO L225 Difference]: With dead ends: 36 [2019-10-02 11:21:42,594 INFO L226 Difference]: Without dead ends: 33 [2019-10-02 11:21:42,595 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-10-02 11:21:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-02 11:21:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-02 11:21:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-02 11:21:42,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-02 11:21:42,601 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-10-02 11:21:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:42,601 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-02 11:21:42,601 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-02 11:21:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-02 11:21:42,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-02 11:21:42,602 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:42,602 INFO L411 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:42,602 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:42,602 INFO L82 PathProgramCache]: Analyzing trace with hash -363089018, now seen corresponding path program 16 times [2019-10-02 11:21:42,602 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:42,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:42,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:42,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:42,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:42,617 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:42,617 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:42,621 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:42,649 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:21:42,807 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:21:42,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:42,809 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-02 11:21:42,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:43,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:43,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:43,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-02 11:21:43,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-02 11:21:43,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-02 11:21:43,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-02 11:21:43,268 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-10-02 11:21:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:43,696 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-10-02 11:21:43,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-02 11:21:43,697 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-10-02 11:21:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:43,697 INFO L225 Difference]: With dead ends: 37 [2019-10-02 11:21:43,698 INFO L226 Difference]: Without dead ends: 34 [2019-10-02 11:21:43,698 INFO L640 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 [2019-10-02 11:21:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-02 11:21:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-02 11:21:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-02 11:21:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-02 11:21:43,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-10-02 11:21:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:43,704 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-02 11:21:43,704 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-02 11:21:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-02 11:21:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-02 11:21:43,705 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:43,705 INFO L411 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:43,705 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1629079872, now seen corresponding path program 17 times [2019-10-02 11:21:43,705 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:43,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:43,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:43,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:43,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:43,716 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:43,716 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:43,716 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:43,753 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:21:43,786 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-02 11:21:43,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:43,788 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-10-02 11:21:43,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:44,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:44,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:44,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-02 11:21:44,190 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-02 11:21:44,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-02 11:21:44,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-10-02 11:21:44,191 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-10-02 11:21:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:44,701 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-10-02 11:21:44,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-02 11:21:44,701 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-10-02 11:21:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:44,702 INFO L225 Difference]: With dead ends: 38 [2019-10-02 11:21:44,702 INFO L226 Difference]: Without dead ends: 35 [2019-10-02 11:21:44,703 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-10-02 11:21:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-02 11:21:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-02 11:21:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-02 11:21:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-02 11:21:44,711 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-10-02 11:21:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:44,711 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-02 11:21:44,712 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-02 11:21:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-02 11:21:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-02 11:21:44,712 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:44,713 INFO L411 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:44,713 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1038193978, now seen corresponding path program 18 times [2019-10-02 11:21:44,713 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:44,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:44,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:44,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:44,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:44,744 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:44,744 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:44,744 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 11:21:44,771 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:44,855 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-02 11:21:44,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:44,858 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-10-02 11:21:44,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:45,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:45,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:45,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-02 11:21:45,286 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-02 11:21:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-02 11:21:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-10-02 11:21:45,287 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-10-02 11:21:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:45,819 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-02 11:21:45,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-02 11:21:45,819 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-10-02 11:21:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:45,820 INFO L225 Difference]: With dead ends: 39 [2019-10-02 11:21:45,820 INFO L226 Difference]: Without dead ends: 36 [2019-10-02 11:21:45,820 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-10-02 11:21:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-02 11:21:45,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-02 11:21:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-02 11:21:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-02 11:21:45,826 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-10-02 11:21:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:45,826 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-02 11:21:45,826 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-02 11:21:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-02 11:21:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-02 11:21:45,827 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:45,827 INFO L411 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:45,827 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2119304704, now seen corresponding path program 19 times [2019-10-02 11:21:45,828 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:45,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:45,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:45,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:45,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:45,837 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:45,838 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:45,838 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:45,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:21:45,909 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-02 11:21:45,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:46,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:46,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:46,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-02 11:21:46,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-02 11:21:46,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-02 11:21:46,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-10-02 11:21:46,378 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-10-02 11:21:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:46,939 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-10-02 11:21:46,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-02 11:21:46,939 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-10-02 11:21:46,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:46,940 INFO L225 Difference]: With dead ends: 40 [2019-10-02 11:21:46,940 INFO L226 Difference]: Without dead ends: 37 [2019-10-02 11:21:46,941 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-10-02 11:21:46,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-02 11:21:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-02 11:21:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-02 11:21:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-10-02 11:21:46,947 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-10-02 11:21:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:46,947 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-10-02 11:21:46,947 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-02 11:21:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-10-02 11:21:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-02 11:21:46,948 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:46,948 INFO L411 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:46,948 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1273998842, now seen corresponding path program 20 times [2019-10-02 11:21:46,949 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:46,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:46,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:46,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:46,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:46,960 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:46,960 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:46,960 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:47,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:21:47,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:21:47,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:47,062 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-02 11:21:47,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:47,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:47,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:47,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-02 11:21:47,532 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-02 11:21:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-02 11:21:47,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-10-02 11:21:47,533 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-10-02 11:21:48,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:48,134 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-10-02 11:21:48,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-02 11:21:48,135 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-10-02 11:21:48,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:48,136 INFO L225 Difference]: With dead ends: 41 [2019-10-02 11:21:48,136 INFO L226 Difference]: Without dead ends: 38 [2019-10-02 11:21:48,137 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-10-02 11:21:48,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-02 11:21:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-02 11:21:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-02 11:21:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-02 11:21:48,141 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-10-02 11:21:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:48,142 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-02 11:21:48,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-02 11:21:48,142 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-02 11:21:48,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 11:21:48,142 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:48,143 INFO L411 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:48,143 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:48,143 INFO L82 PathProgramCache]: Analyzing trace with hash -839320896, now seen corresponding path program 21 times [2019-10-02 11:21:48,143 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:48,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:48,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:48,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:48,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:48,153 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:48,153 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:48,153 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:48,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:21:48,458 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-02 11:21:48,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:48,460 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-02 11:21:48,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:48,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:48,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:48,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-02 11:21:48,960 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-02 11:21:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-02 11:21:48,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-10-02 11:21:48,961 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-10-02 11:21:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:49,587 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-02 11:21:49,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-02 11:21:49,590 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-10-02 11:21:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:49,591 INFO L225 Difference]: With dead ends: 42 [2019-10-02 11:21:49,591 INFO L226 Difference]: Without dead ends: 39 [2019-10-02 11:21:49,592 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-10-02 11:21:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-02 11:21:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-02 11:21:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-02 11:21:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-10-02 11:21:49,597 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-10-02 11:21:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:49,597 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-10-02 11:21:49,597 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-02 11:21:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-10-02 11:21:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-02 11:21:49,598 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:49,598 INFO L411 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:49,598 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash -249206458, now seen corresponding path program 22 times [2019-10-02 11:21:49,599 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:49,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:49,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:49,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:49,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:49,608 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:49,608 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:49,608 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:49,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:21:49,866 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:21:49,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:49,868 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-10-02 11:21:49,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:50,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:50,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:50,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-02 11:21:50,439 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-02 11:21:50,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-02 11:21:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-10-02 11:21:50,440 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-10-02 11:21:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:51,107 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-02 11:21:51,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-02 11:21:51,108 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-10-02 11:21:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:51,109 INFO L225 Difference]: With dead ends: 43 [2019-10-02 11:21:51,109 INFO L226 Difference]: Without dead ends: 40 [2019-10-02 11:21:51,110 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-10-02 11:21:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-02 11:21:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-02 11:21:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-02 11:21:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-02 11:21:51,115 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-10-02 11:21:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:51,116 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-02 11:21:51,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-02 11:21:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-02 11:21:51,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-02 11:21:51,117 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:51,117 INFO L411 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:51,117 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash 864471936, now seen corresponding path program 23 times [2019-10-02 11:21:51,117 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:51,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:51,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:51,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:51,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:51,126 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:51,127 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:51,127 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:51,157 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:21:51,207 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-02 11:21:51,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:51,211 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-10-02 11:21:51,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:51,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:51,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:51,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-02 11:21:51,840 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-02 11:21:51,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-02 11:21:51,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-10-02 11:21:51,841 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-10-02 11:21:52,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:52,598 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-10-02 11:21:52,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-02 11:21:52,598 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-10-02 11:21:52,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:52,598 INFO L225 Difference]: With dead ends: 44 [2019-10-02 11:21:52,598 INFO L226 Difference]: Without dead ends: 41 [2019-10-02 11:21:52,599 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-10-02 11:21:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-02 11:21:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-02 11:21:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-02 11:21:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-10-02 11:21:52,605 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-10-02 11:21:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:52,605 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-10-02 11:21:52,605 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-02 11:21:52,605 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-10-02 11:21:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-02 11:21:52,606 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:52,606 INFO L411 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:52,606 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:52,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1028763782, now seen corresponding path program 24 times [2019-10-02 11:21:52,607 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:52,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:52,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:52,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:52,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:52,615 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:52,616 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:52,616 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:52,654 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:21:52,757 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-02 11:21:52,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:52,759 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-10-02 11:21:52,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:53,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:53,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:53,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-10-02 11:21:53,366 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-02 11:21:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-02 11:21:53,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-10-02 11:21:53,367 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-10-02 11:21:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:54,150 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-10-02 11:21:54,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-02 11:21:54,152 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-10-02 11:21:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:54,153 INFO L225 Difference]: With dead ends: 45 [2019-10-02 11:21:54,153 INFO L226 Difference]: Without dead ends: 42 [2019-10-02 11:21:54,154 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-10-02 11:21:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-02 11:21:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-02 11:21:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-02 11:21:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-10-02 11:21:54,158 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-10-02 11:21:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:54,158 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-10-02 11:21:54,158 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-02 11:21:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-10-02 11:21:54,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-02 11:21:54,158 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:54,158 INFO L411 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:54,159 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:54,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:54,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1826843712, now seen corresponding path program 25 times [2019-10-02 11:21:54,159 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:54,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:54,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:54,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:54,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:54,167 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:54,167 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:54,168 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:54,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:21:54,258 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-10-02 11:21:54,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:54,903 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:54,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:54,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-02 11:21:54,946 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-02 11:21:54,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-02 11:21:54,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-10-02 11:21:54,947 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-10-02 11:21:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:55,788 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-10-02 11:21:55,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-02 11:21:55,789 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-10-02 11:21:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:55,789 INFO L225 Difference]: With dead ends: 46 [2019-10-02 11:21:55,790 INFO L226 Difference]: Without dead ends: 43 [2019-10-02 11:21:55,792 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-10-02 11:21:55,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-02 11:21:55,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-02 11:21:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-02 11:21:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-10-02 11:21:55,802 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-10-02 11:21:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:55,802 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-10-02 11:21:55,803 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-02 11:21:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-10-02 11:21:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-02 11:21:55,803 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:55,804 INFO L411 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:55,804 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:55,804 INFO L82 PathProgramCache]: Analyzing trace with hash 797517766, now seen corresponding path program 26 times [2019-10-02 11:21:55,804 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:55,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:55,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:55,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:21:55,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:55,813 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:55,813 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:55,813 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:55,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:21:55,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:21:55,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:55,915 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-10-02 11:21:55,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:56,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:56,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:56,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-10-02 11:21:56,592 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-02 11:21:56,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-02 11:21:56,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-10-02 11:21:56,593 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-10-02 11:21:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:57,446 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-02 11:21:57,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-02 11:21:57,447 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-02 11:21:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:57,447 INFO L225 Difference]: With dead ends: 47 [2019-10-02 11:21:57,448 INFO L226 Difference]: Without dead ends: 44 [2019-10-02 11:21:57,449 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-10-02 11:21:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-02 11:21:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-02 11:21:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-02 11:21:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-02 11:21:57,453 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-10-02 11:21:57,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:57,454 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-02 11:21:57,454 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-02 11:21:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-02 11:21:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-02 11:21:57,454 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:57,454 INFO L411 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:57,454 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:57,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1046815488, now seen corresponding path program 27 times [2019-10-02 11:21:57,455 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:57,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:57,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:57,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:57,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:57,463 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:57,464 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:57,464 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:57,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:21:58,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-02 11:21:58,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:21:58,069 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-10-02 11:21:58,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:21:58,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:21:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:21:58,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:21:58,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-02 11:21:58,744 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-02 11:21:58,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-02 11:21:58,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-10-02 11:21:58,745 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-10-02 11:21:59,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:21:59,661 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-02 11:21:59,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-02 11:21:59,662 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-10-02 11:21:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:21:59,663 INFO L225 Difference]: With dead ends: 48 [2019-10-02 11:21:59,663 INFO L226 Difference]: Without dead ends: 45 [2019-10-02 11:21:59,664 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-10-02 11:21:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-02 11:21:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-02 11:21:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-02 11:21:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-10-02 11:21:59,669 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-10-02 11:21:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:21:59,669 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-10-02 11:21:59,669 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-02 11:21:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-10-02 11:21:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-02 11:21:59,670 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:21:59,670 INFO L411 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:21:59,670 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:21:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:21:59,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1908395782, now seen corresponding path program 28 times [2019-10-02 11:21:59,670 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:21:59,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:21:59,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:59,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:21:59,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:21:59,693 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:21:59,693 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:21:59,693 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:21:59,743 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:22:00,317 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:22:00,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:00,320 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-10-02 11:22:00,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:01,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:01,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:01,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-10-02 11:22:01,164 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-02 11:22:01,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-02 11:22:01,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-10-02 11:22:01,165 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-10-02 11:22:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:02,171 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-10-02 11:22:02,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-02 11:22:02,171 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-10-02 11:22:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:02,172 INFO L225 Difference]: With dead ends: 49 [2019-10-02 11:22:02,172 INFO L226 Difference]: Without dead ends: 46 [2019-10-02 11:22:02,173 INFO L640 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 [2019-10-02 11:22:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-02 11:22:02,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-02 11:22:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-02 11:22:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-02 11:22:02,177 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-10-02 11:22:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:02,177 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-02 11:22:02,177 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-02 11:22:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-02 11:22:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-02 11:22:02,177 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:02,177 INFO L411 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:02,178 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash -969335360, now seen corresponding path program 29 times [2019-10-02 11:22:02,178 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:02,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:02,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:02,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:02,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:02,187 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:02,187 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:02,187 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:02,232 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:22:02,296 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-02 11:22:02,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:02,305 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-10-02 11:22:02,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:03,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:03,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:03,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-10-02 11:22:03,055 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-02 11:22:03,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-02 11:22:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-10-02 11:22:03,056 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-10-02 11:22:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:04,081 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-10-02 11:22:04,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-02 11:22:04,082 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-10-02 11:22:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:04,083 INFO L225 Difference]: With dead ends: 50 [2019-10-02 11:22:04,083 INFO L226 Difference]: Without dead ends: 47 [2019-10-02 11:22:04,084 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-10-02 11:22:04,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-02 11:22:04,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-02 11:22:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-02 11:22:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-10-02 11:22:04,088 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-10-02 11:22:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:04,088 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-10-02 11:22:04,088 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-02 11:22:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-10-02 11:22:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-02 11:22:04,089 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:04,089 INFO L411 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:04,089 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:04,090 INFO L82 PathProgramCache]: Analyzing trace with hash 15312454, now seen corresponding path program 30 times [2019-10-02 11:22:04,090 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:04,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:04,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:04,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:04,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:04,098 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:04,099 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:04,099 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:04,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:22:04,400 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-02 11:22:04,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:04,404 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-10-02 11:22:04,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:05,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:05,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:05,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-10-02 11:22:05,204 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-02 11:22:05,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-02 11:22:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-10-02 11:22:05,205 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-10-02 11:22:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:06,276 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-02 11:22:06,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-02 11:22:06,277 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-10-02 11:22:06,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:06,278 INFO L225 Difference]: With dead ends: 51 [2019-10-02 11:22:06,278 INFO L226 Difference]: Without dead ends: 48 [2019-10-02 11:22:06,280 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-10-02 11:22:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-02 11:22:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-02 11:22:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-02 11:22:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-02 11:22:06,285 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-10-02 11:22:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:06,285 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-02 11:22:06,285 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-02 11:22:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-02 11:22:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-02 11:22:06,286 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:06,286 INFO L411 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:06,286 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash 474623616, now seen corresponding path program 31 times [2019-10-02 11:22:06,287 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:06,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:06,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:06,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:06,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:06,296 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:06,296 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:06,296 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:06,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:22:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:22:06,404 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-10-02 11:22:06,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:07,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:07,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:07,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-10-02 11:22:07,253 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-02 11:22:07,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-02 11:22:07,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-10-02 11:22:07,254 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-10-02 11:22:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:08,385 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-10-02 11:22:08,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-02 11:22:08,385 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-10-02 11:22:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:08,386 INFO L225 Difference]: With dead ends: 52 [2019-10-02 11:22:08,386 INFO L226 Difference]: Without dead ends: 49 [2019-10-02 11:22:08,388 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-10-02 11:22:08,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-02 11:22:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-02 11:22:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-02 11:22:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-02 11:22:08,393 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-10-02 11:22:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:08,393 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-02 11:22:08,393 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-02 11:22:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-02 11:22:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-02 11:22:08,393 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:08,394 INFO L411 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:08,394 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:08,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1828367750, now seen corresponding path program 32 times [2019-10-02 11:22:08,394 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:08,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:08,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:08,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:22:08,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:08,403 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:08,403 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:08,403 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:08,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:22:08,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:22:08,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:08,512 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-10-02 11:22:08,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:09,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:09,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:09,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-10-02 11:22:09,418 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-02 11:22:09,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-02 11:22:09,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-10-02 11:22:09,419 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-10-02 11:22:10,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:10,621 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-10-02 11:22:10,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-02 11:22:10,621 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-10-02 11:22:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:10,622 INFO L225 Difference]: With dead ends: 53 [2019-10-02 11:22:10,622 INFO L226 Difference]: Without dead ends: 50 [2019-10-02 11:22:10,623 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-10-02 11:22:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-02 11:22:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-02 11:22:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-02 11:22:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-10-02 11:22:10,627 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-10-02 11:22:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:10,627 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-10-02 11:22:10,628 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-02 11:22:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-10-02 11:22:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-02 11:22:10,628 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:10,628 INFO L411 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:10,629 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash 844762944, now seen corresponding path program 33 times [2019-10-02 11:22:10,629 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:10,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:10,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:10,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:10,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:10,638 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:10,638 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:10,638 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:10,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:22:12,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-02 11:22:12,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:12,004 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-10-02 11:22:12,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:12,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:12,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:12,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-10-02 11:22:12,906 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-02 11:22:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-02 11:22:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-10-02 11:22:12,907 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-10-02 11:22:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:14,138 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-10-02 11:22:14,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-02 11:22:14,139 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-10-02 11:22:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:14,140 INFO L225 Difference]: With dead ends: 54 [2019-10-02 11:22:14,140 INFO L226 Difference]: Without dead ends: 51 [2019-10-02 11:22:14,141 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-10-02 11:22:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-02 11:22:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-02 11:22:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-02 11:22:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-10-02 11:22:14,146 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-10-02 11:22:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:14,146 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-10-02 11:22:14,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-02 11:22:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-10-02 11:22:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-02 11:22:14,147 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:14,147 INFO L411 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:14,147 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:14,148 INFO L82 PathProgramCache]: Analyzing trace with hash 417785030, now seen corresponding path program 34 times [2019-10-02 11:22:14,148 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:14,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:14,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:14,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:14,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:14,156 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:14,156 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:14,157 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:14,211 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:22:14,566 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:22:14,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:14,569 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-10-02 11:22:14,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:15,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:15,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:15,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-10-02 11:22:15,514 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-02 11:22:15,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-02 11:22:15,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-10-02 11:22:15,515 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-10-02 11:22:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:16,821 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-10-02 11:22:16,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-02 11:22:16,822 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-10-02 11:22:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:16,823 INFO L225 Difference]: With dead ends: 55 [2019-10-02 11:22:16,823 INFO L226 Difference]: Without dead ends: 52 [2019-10-02 11:22:16,824 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-10-02 11:22:16,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-02 11:22:16,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-02 11:22:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-02 11:22:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-10-02 11:22:16,829 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-10-02 11:22:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:16,830 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-10-02 11:22:16,830 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-02 11:22:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-10-02 11:22:16,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-02 11:22:16,830 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:16,830 INFO L411 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:16,831 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:16,831 INFO L82 PathProgramCache]: Analyzing trace with hash 66371584, now seen corresponding path program 35 times [2019-10-02 11:22:16,831 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:16,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:16,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:16,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:16,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:16,840 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:16,840 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:16,840 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:16,894 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:22:17,001 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-02 11:22:17,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:17,006 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-10-02 11:22:17,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:17,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:17,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:17,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-10-02 11:22:17,981 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-02 11:22:17,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-02 11:22:17,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-10-02 11:22:17,982 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-10-02 11:22:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:19,366 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-10-02 11:22:19,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-02 11:22:19,366 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-10-02 11:22:19,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:19,367 INFO L225 Difference]: With dead ends: 56 [2019-10-02 11:22:19,367 INFO L226 Difference]: Without dead ends: 53 [2019-10-02 11:22:19,369 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-10-02 11:22:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-02 11:22:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-02 11:22:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-02 11:22:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-10-02 11:22:19,375 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-10-02 11:22:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:19,375 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-10-02 11:22:19,375 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-02 11:22:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-10-02 11:22:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-02 11:22:19,376 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:19,376 INFO L411 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:19,376 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2057456646, now seen corresponding path program 36 times [2019-10-02 11:22:19,377 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:19,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:19,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:19,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:19,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:19,386 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:19,386 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:19,386 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:19,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:22:19,917 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-02 11:22:19,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:19,921 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-10-02 11:22:19,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:20,906 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:20,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:20,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-10-02 11:22:20,952 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-02 11:22:20,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-02 11:22:20,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-10-02 11:22:20,953 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-10-02 11:22:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:22,408 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-10-02 11:22:22,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-02 11:22:22,408 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-10-02 11:22:22,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:22,409 INFO L225 Difference]: With dead ends: 57 [2019-10-02 11:22:22,410 INFO L226 Difference]: Without dead ends: 54 [2019-10-02 11:22:22,411 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-10-02 11:22:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-02 11:22:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-02 11:22:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-02 11:22:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-10-02 11:22:22,418 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-10-02 11:22:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:22,418 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-10-02 11:22:22,418 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-02 11:22:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-10-02 11:22:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-02 11:22:22,419 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:22,419 INFO L411 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:22,419 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:22,419 INFO L82 PathProgramCache]: Analyzing trace with hash -643415872, now seen corresponding path program 37 times [2019-10-02 11:22:22,419 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:22,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:22,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:22,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:22,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:22,429 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:22,430 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:22,430 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:22,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:22:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:22:22,643 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-10-02 11:22:22,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:23,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:23,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:23,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-10-02 11:22:23,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-02 11:22:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-02 11:22:23,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-10-02 11:22:23,981 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-10-02 11:22:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:25,472 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-10-02 11:22:25,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-02 11:22:25,473 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-10-02 11:22:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:25,474 INFO L225 Difference]: With dead ends: 58 [2019-10-02 11:22:25,474 INFO L226 Difference]: Without dead ends: 55 [2019-10-02 11:22:25,474 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-10-02 11:22:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-02 11:22:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-02 11:22:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-02 11:22:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-10-02 11:22:25,480 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-10-02 11:22:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:25,480 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-10-02 11:22:25,480 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-02 11:22:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-10-02 11:22:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-02 11:22:25,481 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:25,481 INFO L411 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:25,481 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1528881990, now seen corresponding path program 38 times [2019-10-02 11:22:25,481 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:25,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:25,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:25,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:22:25,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:25,490 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:25,490 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:25,490 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:25,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:22:25,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:22:25,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:25,662 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-10-02 11:22:25,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:26,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:26,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:26,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-10-02 11:22:26,805 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-02 11:22:26,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-02 11:22:26,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-10-02 11:22:26,806 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-10-02 11:22:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:28,427 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-10-02 11:22:28,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-02 11:22:28,428 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-10-02 11:22:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:28,428 INFO L225 Difference]: With dead ends: 59 [2019-10-02 11:22:28,429 INFO L226 Difference]: Without dead ends: 56 [2019-10-02 11:22:28,429 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-10-02 11:22:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-02 11:22:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-02 11:22:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-02 11:22:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-10-02 11:22:28,435 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-10-02 11:22:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:28,435 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-10-02 11:22:28,435 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-02 11:22:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-10-02 11:22:28,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-02 11:22:28,436 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:28,436 INFO L411 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:28,436 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash 150638976, now seen corresponding path program 39 times [2019-10-02 11:22:28,436 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:28,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:28,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:28,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:28,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:28,445 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:28,445 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:28,445 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:28,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:22:30,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-10-02 11:22:30,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:30,402 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-10-02 11:22:30,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:31,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:31,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:31,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-10-02 11:22:31,556 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-10-02 11:22:31,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-10-02 11:22:31,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-10-02 11:22:31,557 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-10-02 11:22:33,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:33,248 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-10-02 11:22:33,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-02 11:22:33,248 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-10-02 11:22:33,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:33,249 INFO L225 Difference]: With dead ends: 60 [2019-10-02 11:22:33,249 INFO L226 Difference]: Without dead ends: 57 [2019-10-02 11:22:33,249 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-10-02 11:22:33,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-02 11:22:33,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-02 11:22:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-02 11:22:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-10-02 11:22:33,254 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-10-02 11:22:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:33,254 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-10-02 11:22:33,254 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-10-02 11:22:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-10-02 11:22:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-02 11:22:33,255 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:33,255 INFO L411 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:33,255 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:33,255 INFO L82 PathProgramCache]: Analyzing trace with hash 374778502, now seen corresponding path program 40 times [2019-10-02 11:22:33,255 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:33,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:33,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:33,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:33,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:33,263 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:33,263 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:33,263 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:33,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:22:33,757 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:22:33,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:33,760 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-10-02 11:22:33,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:35,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:35,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:35,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-10-02 11:22:35,177 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-02 11:22:35,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-02 11:22:35,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-10-02 11:22:35,178 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-10-02 11:22:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:36,874 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-10-02 11:22:36,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-02 11:22:36,875 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-10-02 11:22:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:36,876 INFO L225 Difference]: With dead ends: 61 [2019-10-02 11:22:36,876 INFO L226 Difference]: Without dead ends: 58 [2019-10-02 11:22:36,877 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-10-02 11:22:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-02 11:22:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-02 11:22:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-02 11:22:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-10-02 11:22:36,882 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-10-02 11:22:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:36,883 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-10-02 11:22:36,883 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-02 11:22:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-10-02 11:22:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-02 11:22:36,883 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:36,883 INFO L411 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:36,883 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1266830784, now seen corresponding path program 41 times [2019-10-02 11:22:36,884 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:36,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:36,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:36,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:36,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:36,892 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:36,892 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:36,892 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:36,954 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:22:37,067 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-10-02 11:22:37,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:37,074 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-10-02 11:22:37,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:38,253 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:38,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:38,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-10-02 11:22:38,307 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-02 11:22:38,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-02 11:22:38,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-10-02 11:22:38,307 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-10-02 11:22:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:40,106 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-10-02 11:22:40,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-10-02 11:22:40,106 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-10-02 11:22:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:40,107 INFO L225 Difference]: With dead ends: 62 [2019-10-02 11:22:40,107 INFO L226 Difference]: Without dead ends: 59 [2019-10-02 11:22:40,108 INFO L640 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 [2019-10-02 11:22:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-02 11:22:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-10-02 11:22:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-02 11:22:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-10-02 11:22:40,114 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-10-02 11:22:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:40,114 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-10-02 11:22:40,114 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-02 11:22:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-10-02 11:22:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-02 11:22:40,115 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:40,115 INFO L411 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:40,115 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash -617111098, now seen corresponding path program 42 times [2019-10-02 11:22:40,115 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:40,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:40,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:40,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:40,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:40,124 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:40,124 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:40,124 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:40,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:22:40,771 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-10-02 11:22:40,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:40,775 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-10-02 11:22:40,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:42,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:42,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:42,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-10-02 11:22:42,128 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-02 11:22:42,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-02 11:22:42,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-10-02 11:22:42,129 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-10-02 11:22:44,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:44,014 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-10-02 11:22:44,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-10-02 11:22:44,015 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-10-02 11:22:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:44,015 INFO L225 Difference]: With dead ends: 63 [2019-10-02 11:22:44,016 INFO L226 Difference]: Without dead ends: 60 [2019-10-02 11:22:44,016 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-10-02 11:22:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-02 11:22:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-10-02 11:22:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-02 11:22:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-10-02 11:22:44,026 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-10-02 11:22:44,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:44,026 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-10-02 11:22:44,027 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-10-02 11:22:44,027 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-10-02 11:22:44,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-02 11:22:44,027 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:44,027 INFO L411 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:44,027 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1950637312, now seen corresponding path program 43 times [2019-10-02 11:22:44,028 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:44,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:44,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:44,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:44,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:44,035 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:44,035 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:44,035 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:44,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:22:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:22:44,194 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-10-02 11:22:44,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:45,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:45,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:45,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-10-02 11:22:45,552 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-10-02 11:22:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-10-02 11:22:45,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-10-02 11:22:45,553 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-10-02 11:22:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:47,501 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-10-02 11:22:47,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-10-02 11:22:47,501 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-10-02 11:22:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:47,502 INFO L225 Difference]: With dead ends: 64 [2019-10-02 11:22:47,502 INFO L226 Difference]: Without dead ends: 61 [2019-10-02 11:22:47,502 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-10-02 11:22:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-02 11:22:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-02 11:22:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-02 11:22:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-10-02 11:22:47,509 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-10-02 11:22:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:47,509 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-10-02 11:22:47,509 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-10-02 11:22:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-10-02 11:22:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-02 11:22:47,510 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:47,510 INFO L411 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:47,510 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:47,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:47,511 INFO L82 PathProgramCache]: Analyzing trace with hash -340276986, now seen corresponding path program 44 times [2019-10-02 11:22:47,511 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:47,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:47,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:47,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:22:47,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:47,520 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:47,520 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:47,520 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:47,615 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:22:47,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:22:47,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:47,713 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-10-02 11:22:47,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:49,032 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:49,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:49,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-10-02 11:22:49,090 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-02 11:22:49,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-02 11:22:49,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-10-02 11:22:49,090 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-10-02 11:22:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:51,111 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-10-02 11:22:51,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-02 11:22:51,115 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-10-02 11:22:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:51,116 INFO L225 Difference]: With dead ends: 65 [2019-10-02 11:22:51,116 INFO L226 Difference]: Without dead ends: 62 [2019-10-02 11:22:51,117 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-10-02 11:22:51,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-02 11:22:51,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-10-02 11:22:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-02 11:22:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-10-02 11:22:51,123 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-10-02 11:22:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:51,124 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-10-02 11:22:51,124 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-02 11:22:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-10-02 11:22:51,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-02 11:22:51,124 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:51,125 INFO L411 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:51,125 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1958714432, now seen corresponding path program 45 times [2019-10-02 11:22:51,125 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:51,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:51,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:51,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:51,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:51,135 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:51,135 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:51,135 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:51,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:22:53,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-10-02 11:22:53,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:53,922 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-10-02 11:22:53,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:55,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:55,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:55,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-10-02 11:22:55,363 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-02 11:22:55,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-02 11:22:55,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-10-02 11:22:55,365 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-10-02 11:22:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:22:57,432 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-10-02 11:22:57,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-02 11:22:57,432 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-10-02 11:22:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:22:57,433 INFO L225 Difference]: With dead ends: 66 [2019-10-02 11:22:57,433 INFO L226 Difference]: Without dead ends: 63 [2019-10-02 11:22:57,434 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-10-02 11:22:57,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-02 11:22:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-02 11:22:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-02 11:22:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-10-02 11:22:57,441 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-10-02 11:22:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:22:57,441 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-10-02 11:22:57,441 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-02 11:22:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-10-02 11:22:57,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-02 11:22:57,442 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:22:57,442 INFO L411 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:22:57,442 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:22:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:22:57,442 INFO L82 PathProgramCache]: Analyzing trace with hash -590667706, now seen corresponding path program 46 times [2019-10-02 11:22:57,443 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:22:57,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:22:57,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:57,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:22:57,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:22:57,451 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:22:57,451 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:22:57,451 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:22:57,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:22:58,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:22:58,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:22:58,037 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-10-02 11:22:58,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:22:59,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:22:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:22:59,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:22:59,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-10-02 11:22:59,528 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-10-02 11:22:59,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-10-02 11:22:59,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-10-02 11:22:59,529 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-10-02 11:23:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:01,652 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-10-02 11:23:01,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-02 11:23:01,652 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-10-02 11:23:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:01,653 INFO L225 Difference]: With dead ends: 67 [2019-10-02 11:23:01,653 INFO L226 Difference]: Without dead ends: 64 [2019-10-02 11:23:01,653 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-10-02 11:23:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-02 11:23:01,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-02 11:23:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-02 11:23:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-10-02 11:23:01,658 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-10-02 11:23:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:01,658 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-10-02 11:23:01,658 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-10-02 11:23:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-10-02 11:23:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-02 11:23:01,659 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:01,659 INFO L411 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:01,659 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:01,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:01,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1130892160, now seen corresponding path program 47 times [2019-10-02 11:23:01,659 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:01,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:01,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:01,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:01,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:01,668 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:01,668 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:01,668 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:01,767 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:23:01,907 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-10-02 11:23:01,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:01,913 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-10-02 11:23:01,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:03,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:03,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:03,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-10-02 11:23:03,489 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-10-02 11:23:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-10-02 11:23:03,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-10-02 11:23:03,490 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-10-02 11:23:05,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:05,735 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-10-02 11:23:05,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-02 11:23:05,735 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-10-02 11:23:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:05,736 INFO L225 Difference]: With dead ends: 68 [2019-10-02 11:23:05,737 INFO L226 Difference]: Without dead ends: 65 [2019-10-02 11:23:05,737 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-10-02 11:23:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-02 11:23:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-10-02 11:23:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-02 11:23:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-10-02 11:23:05,745 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-10-02 11:23:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:05,745 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-10-02 11:23:05,745 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-10-02 11:23:05,745 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-10-02 11:23:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-02 11:23:05,746 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:05,746 INFO L411 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:05,746 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:05,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:05,746 INFO L82 PathProgramCache]: Analyzing trace with hash -697981050, now seen corresponding path program 48 times [2019-10-02 11:23:05,746 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:05,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:05,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:05,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:05,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:05,755 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:05,756 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:05,756 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:05,843 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:23:06,641 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-02 11:23:06,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:06,648 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-10-02 11:23:06,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:08,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:08,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:08,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-10-02 11:23:08,235 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-10-02 11:23:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-10-02 11:23:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-10-02 11:23:08,236 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-10-02 11:23:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:10,561 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-10-02 11:23:10,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-02 11:23:10,561 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-10-02 11:23:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:10,562 INFO L225 Difference]: With dead ends: 69 [2019-10-02 11:23:10,562 INFO L226 Difference]: Without dead ends: 66 [2019-10-02 11:23:10,563 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2019-10-02 11:23:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-02 11:23:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-10-02 11:23:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-02 11:23:10,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-10-02 11:23:10,570 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-10-02 11:23:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:10,570 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-10-02 11:23:10,571 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-10-02 11:23:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-10-02 11:23:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-02 11:23:10,571 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:10,571 INFO L411 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:10,572 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash -162638528, now seen corresponding path program 49 times [2019-10-02 11:23:10,572 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:10,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:10,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:10,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:10,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:10,582 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:10,582 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:10,582 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:10,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:10,779 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-10-02 11:23:10,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:12,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:12,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:12,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-10-02 11:23:12,439 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-02 11:23:12,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-02 11:23:12,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-10-02 11:23:12,439 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-10-02 11:23:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:14,840 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-10-02 11:23:14,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-02 11:23:14,841 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-10-02 11:23:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:14,842 INFO L225 Difference]: With dead ends: 70 [2019-10-02 11:23:14,842 INFO L226 Difference]: Without dead ends: 67 [2019-10-02 11:23:14,842 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2019-10-02 11:23:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-02 11:23:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-10-02 11:23:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-02 11:23:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-10-02 11:23:14,850 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-10-02 11:23:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:14,850 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-10-02 11:23:14,850 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-02 11:23:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-10-02 11:23:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-02 11:23:14,851 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:14,851 INFO L411 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:14,851 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:14,852 INFO L82 PathProgramCache]: Analyzing trace with hash -746889530, now seen corresponding path program 50 times [2019-10-02 11:23:14,852 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:14,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:14,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:14,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:14,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:14,861 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:14,861 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:14,861 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:14,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:23:15,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:23:15,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:15,070 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-10-02 11:23:15,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:16,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:16,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:16,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-10-02 11:23:16,778 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-02 11:23:16,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-02 11:23:16,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-10-02 11:23:16,779 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-10-02 11:23:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:19,295 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-10-02 11:23:19,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-02 11:23:19,296 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-10-02 11:23:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:19,297 INFO L225 Difference]: With dead ends: 71 [2019-10-02 11:23:19,297 INFO L226 Difference]: Without dead ends: 68 [2019-10-02 11:23:19,298 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-10-02 11:23:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-02 11:23:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-02 11:23:19,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-02 11:23:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-10-02 11:23:19,304 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-10-02 11:23:19,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:19,304 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-10-02 11:23:19,304 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-02 11:23:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-10-02 11:23:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-02 11:23:19,305 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:19,305 INFO L411 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:19,305 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:19,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1678801408, now seen corresponding path program 51 times [2019-10-02 11:23:19,306 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:19,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:19,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:19,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:19,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:19,313 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:19,313 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:19,313 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:19,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:23:23,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-10-02 11:23:23,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:23,897 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-10-02 11:23:23,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:25,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:25,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:25,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-10-02 11:23:25,915 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-10-02 11:23:25,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-10-02 11:23:25,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-10-02 11:23:25,915 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-10-02 11:23:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:28,501 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-10-02 11:23:28,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-10-02 11:23:28,502 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-10-02 11:23:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:28,503 INFO L225 Difference]: With dead ends: 72 [2019-10-02 11:23:28,503 INFO L226 Difference]: Without dead ends: 69 [2019-10-02 11:23:28,503 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-10-02 11:23:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-02 11:23:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-10-02 11:23:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-02 11:23:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-10-02 11:23:28,511 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-10-02 11:23:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:28,511 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-10-02 11:23:28,511 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-10-02 11:23:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-10-02 11:23:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-02 11:23:28,512 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:28,512 INFO L411 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:28,512 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:28,512 INFO L82 PathProgramCache]: Analyzing trace with hash -503298554, now seen corresponding path program 52 times [2019-10-02 11:23:28,512 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:28,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:28,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:28,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:28,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:28,522 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:28,523 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:28,523 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:28,625 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:23:29,701 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:23:29,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:29,706 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-10-02 11:23:29,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:31,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:31,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:31,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-10-02 11:23:31,578 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-02 11:23:31,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-02 11:23:31,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-10-02 11:23:31,579 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-10-02 11:23:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:34,248 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-10-02 11:23:34,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-10-02 11:23:34,248 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-10-02 11:23:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:34,249 INFO L225 Difference]: With dead ends: 73 [2019-10-02 11:23:34,250 INFO L226 Difference]: Without dead ends: 70 [2019-10-02 11:23:34,250 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2019-10-02 11:23:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-02 11:23:34,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-10-02 11:23:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-02 11:23:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-10-02 11:23:34,258 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-10-02 11:23:34,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:34,258 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-10-02 11:23:34,259 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-02 11:23:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-10-02 11:23:34,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-02 11:23:34,259 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:34,259 INFO L411 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:34,260 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:34,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1577551552, now seen corresponding path program 53 times [2019-10-02 11:23:34,260 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:34,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:34,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:34,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:34,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:34,270 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:34,270 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:34,270 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:34,374 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:23:34,548 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-10-02 11:23:34,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:34,556 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-10-02 11:23:34,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:36,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:36,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:36,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-10-02 11:23:36,400 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-10-02 11:23:36,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-10-02 11:23:36,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-10-02 11:23:36,401 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-10-02 11:23:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:39,161 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-10-02 11:23:39,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-10-02 11:23:39,162 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-10-02 11:23:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:39,163 INFO L225 Difference]: With dead ends: 74 [2019-10-02 11:23:39,163 INFO L226 Difference]: Without dead ends: 71 [2019-10-02 11:23:39,163 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2019-10-02 11:23:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-02 11:23:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-02 11:23:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-02 11:23:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-10-02 11:23:39,169 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-10-02 11:23:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:39,169 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-10-02 11:23:39,170 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-10-02 11:23:39,170 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-10-02 11:23:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-02 11:23:39,170 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:39,170 INFO L411 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:39,170 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:39,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1659395398, now seen corresponding path program 54 times [2019-10-02 11:23:39,171 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:39,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:39,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:39,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:39,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:39,180 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:39,180 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:39,180 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:39,292 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:23:41,499 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-10-02 11:23:41,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:41,507 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-10-02 11:23:41,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:43,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:43,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:43,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-10-02 11:23:43,473 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-10-02 11:23:43,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-10-02 11:23:43,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-10-02 11:23:43,474 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-10-02 11:23:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:46,346 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-10-02 11:23:46,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-10-02 11:23:46,346 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-10-02 11:23:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:46,348 INFO L225 Difference]: With dead ends: 75 [2019-10-02 11:23:46,348 INFO L226 Difference]: Without dead ends: 72 [2019-10-02 11:23:46,348 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2019-10-02 11:23:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-02 11:23:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-10-02 11:23:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-02 11:23:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-10-02 11:23:46,356 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-10-02 11:23:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:46,357 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-10-02 11:23:46,357 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-10-02 11:23:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-10-02 11:23:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-02 11:23:46,357 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:46,358 INFO L411 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:46,358 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:46,358 INFO L82 PathProgramCache]: Analyzing trace with hash -98412672, now seen corresponding path program 55 times [2019-10-02 11:23:46,358 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:46,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:46,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:46,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:46,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:46,368 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:46,368 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:46,368 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:46,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:23:46,626 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-10-02 11:23:46,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:48,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:48,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:48,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-10-02 11:23:48,652 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-10-02 11:23:48,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-10-02 11:23:48,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-10-02 11:23:48,652 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-10-02 11:23:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:51,559 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-10-02 11:23:51,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-10-02 11:23:51,559 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-10-02 11:23:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:51,560 INFO L225 Difference]: With dead ends: 76 [2019-10-02 11:23:51,560 INFO L226 Difference]: Without dead ends: 73 [2019-10-02 11:23:51,561 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2019-10-02 11:23:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-02 11:23:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-10-02 11:23:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-02 11:23:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-10-02 11:23:51,567 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-10-02 11:23:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:51,567 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-10-02 11:23:51,567 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-10-02 11:23:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-10-02 11:23:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-02 11:23:51,568 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:51,568 INFO L411 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:51,568 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:51,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1244112006, now seen corresponding path program 56 times [2019-10-02 11:23:51,568 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:51,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:51,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:51,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:23:51,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:51,577 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:51,577 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:51,577 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:51,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:23:51,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:23:51,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:23:51,836 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-10-02 11:23:51,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:23:53,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:23:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:23:53,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:23:53,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-10-02 11:23:53,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-10-02 11:23:53,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-10-02 11:23:53,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-10-02 11:23:53,931 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-10-02 11:23:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:23:56,924 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-10-02 11:23:56,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-10-02 11:23:56,925 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-10-02 11:23:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:23:56,926 INFO L225 Difference]: With dead ends: 77 [2019-10-02 11:23:56,926 INFO L226 Difference]: Without dead ends: 74 [2019-10-02 11:23:56,926 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2019-10-02 11:23:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-02 11:23:56,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-10-02 11:23:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-02 11:23:56,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-10-02 11:23:56,934 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-10-02 11:23:56,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:23:56,935 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-10-02 11:23:56,935 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-10-02 11:23:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-10-02 11:23:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-02 11:23:56,936 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:23:56,936 INFO L411 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:23:56,936 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:23:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:23:56,936 INFO L82 PathProgramCache]: Analyzing trace with hash -87295936, now seen corresponding path program 57 times [2019-10-02 11:23:56,936 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:23:56,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:23:56,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:56,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:23:56,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:23:56,945 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:23:56,946 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:23:56,946 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:23:57,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:24:02,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-10-02 11:24:02,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:02,023 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-10-02 11:24:02,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:04,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:04,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:04,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-10-02 11:24:04,126 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-10-02 11:24:04,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-10-02 11:24:04,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-10-02 11:24:04,126 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-10-02 11:24:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:07,263 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-10-02 11:24:07,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-10-02 11:24:07,263 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-10-02 11:24:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:07,264 INFO L225 Difference]: With dead ends: 78 [2019-10-02 11:24:07,264 INFO L226 Difference]: Without dead ends: 75 [2019-10-02 11:24:07,265 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-10-02 11:24:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-02 11:24:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-10-02 11:24:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-02 11:24:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-10-02 11:24:07,270 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-10-02 11:24:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:07,271 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-10-02 11:24:07,271 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-10-02 11:24:07,271 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-10-02 11:24:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-02 11:24:07,271 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:07,271 INFO L411 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:07,271 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1588730822, now seen corresponding path program 58 times [2019-10-02 11:24:07,272 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:07,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:07,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:07,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:07,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:07,279 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:07,280 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:07,280 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:07,377 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:24:08,106 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:24:08,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:08,111 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-10-02 11:24:08,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:10,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:10,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:10,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-10-02 11:24:10,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-10-02 11:24:10,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-10-02 11:24:10,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-10-02 11:24:10,276 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-10-02 11:24:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:13,416 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-10-02 11:24:13,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-10-02 11:24:13,417 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-10-02 11:24:13,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:13,418 INFO L225 Difference]: With dead ends: 79 [2019-10-02 11:24:13,418 INFO L226 Difference]: Without dead ends: 76 [2019-10-02 11:24:13,419 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2019-10-02 11:24:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-02 11:24:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-10-02 11:24:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-02 11:24:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-10-02 11:24:13,428 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-10-02 11:24:13,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:13,428 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-10-02 11:24:13,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-10-02 11:24:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-10-02 11:24:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-02 11:24:13,429 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:13,429 INFO L411 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:13,429 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:13,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2005952768, now seen corresponding path program 59 times [2019-10-02 11:24:13,430 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:13,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:13,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:13,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:13,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:13,440 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:13,440 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:13,440 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:13,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:24:13,852 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-10-02 11:24:13,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:13,859 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-10-02 11:24:13,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:15,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:16,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:16,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-10-02 11:24:16,057 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-10-02 11:24:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-10-02 11:24:16,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-10-02 11:24:16,058 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-10-02 11:24:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:19,337 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-10-02 11:24:19,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-10-02 11:24:19,337 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-10-02 11:24:19,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:19,338 INFO L225 Difference]: With dead ends: 80 [2019-10-02 11:24:19,338 INFO L226 Difference]: Without dead ends: 77 [2019-10-02 11:24:19,338 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-10-02 11:24:19,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-02 11:24:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-10-02 11:24:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-02 11:24:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-10-02 11:24:19,345 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-10-02 11:24:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:19,346 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-10-02 11:24:19,346 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-10-02 11:24:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-10-02 11:24:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-02 11:24:19,346 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:19,347 INFO L411 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:19,347 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:19,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2054931206, now seen corresponding path program 60 times [2019-10-02 11:24:19,347 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:19,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:19,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:19,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:19,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:19,357 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:19,358 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:19,358 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:19,479 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:24:22,048 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-10-02 11:24:22,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:22,056 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-10-02 11:24:22,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:24,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:24,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:24,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-10-02 11:24:24,337 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-10-02 11:24:24,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-10-02 11:24:24,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-10-02 11:24:24,337 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-10-02 11:24:27,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:27,699 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-10-02 11:24:27,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-02 11:24:27,699 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-10-02 11:24:27,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:27,701 INFO L225 Difference]: With dead ends: 81 [2019-10-02 11:24:27,701 INFO L226 Difference]: Without dead ends: 78 [2019-10-02 11:24:27,701 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-10-02 11:24:27,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-02 11:24:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-10-02 11:24:27,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-02 11:24:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-10-02 11:24:27,708 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-10-02 11:24:27,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:27,708 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-10-02 11:24:27,708 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-10-02 11:24:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-10-02 11:24:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-02 11:24:27,708 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:27,708 INFO L411 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:27,709 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:27,709 INFO L82 PathProgramCache]: Analyzing trace with hash -721704512, now seen corresponding path program 61 times [2019-10-02 11:24:27,709 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:27,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:27,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:27,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:27,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:27,718 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:27,718 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:27,718 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:27,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:24:28,019 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-10-02 11:24:28,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:30,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:30,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:30,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-10-02 11:24:30,407 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-02 11:24:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-02 11:24:30,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-10-02 11:24:30,408 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-10-02 11:24:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:33,857 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-10-02 11:24:33,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-10-02 11:24:33,857 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-10-02 11:24:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:33,858 INFO L225 Difference]: With dead ends: 82 [2019-10-02 11:24:33,858 INFO L226 Difference]: Without dead ends: 79 [2019-10-02 11:24:33,859 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2019-10-02 11:24:33,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-02 11:24:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-02 11:24:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-02 11:24:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-10-02 11:24:33,866 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-10-02 11:24:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:33,867 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-10-02 11:24:33,867 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-02 11:24:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-10-02 11:24:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-02 11:24:33,867 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:33,867 INFO L411 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:33,868 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash -898065850, now seen corresponding path program 62 times [2019-10-02 11:24:33,868 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:33,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:33,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:33,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:24:33,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:33,877 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:33,878 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:33,878 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:34,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:24:34,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:24:34,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:34,221 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-10-02 11:24:34,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:36,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:36,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:36,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-10-02 11:24:36,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-10-02 11:24:36,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-10-02 11:24:36,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-10-02 11:24:36,654 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-10-02 11:24:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:40,242 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-10-02 11:24:40,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-10-02 11:24:40,242 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-10-02 11:24:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:40,243 INFO L225 Difference]: With dead ends: 83 [2019-10-02 11:24:40,243 INFO L226 Difference]: Without dead ends: 80 [2019-10-02 11:24:40,244 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2019-10-02 11:24:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-02 11:24:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-10-02 11:24:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-02 11:24:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-10-02 11:24:40,251 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-10-02 11:24:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:40,251 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-10-02 11:24:40,251 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-10-02 11:24:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-10-02 11:24:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-02 11:24:40,251 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:40,251 INFO L411 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:40,252 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:40,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2070300032, now seen corresponding path program 63 times [2019-10-02 11:24:40,252 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:40,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:40,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:40,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:40,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:40,262 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:40,262 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:40,262 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:40,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:24:45,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-10-02 11:24:45,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:45,468 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-10-02 11:24:45,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:47,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:47,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:47,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-10-02 11:24:47,971 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-10-02 11:24:47,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-10-02 11:24:47,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-10-02 11:24:47,973 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-10-02 11:24:51,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:51,660 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-10-02 11:24:51,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-10-02 11:24:51,661 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-10-02 11:24:51,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:51,662 INFO L225 Difference]: With dead ends: 84 [2019-10-02 11:24:51,662 INFO L226 Difference]: Without dead ends: 81 [2019-10-02 11:24:51,663 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2019-10-02 11:24:51,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-02 11:24:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-10-02 11:24:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-02 11:24:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-10-02 11:24:51,670 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-10-02 11:24:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:51,670 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-10-02 11:24:51,670 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-10-02 11:24:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-10-02 11:24:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-02 11:24:51,671 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:51,671 INFO L411 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:51,671 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash 245145990, now seen corresponding path program 64 times [2019-10-02 11:24:51,671 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:51,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:51,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:51,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:51,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:51,678 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:51,679 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:51,679 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:51,802 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:24:52,681 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:24:52,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:52,685 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-10-02 11:24:52,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:24:55,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:24:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:24:55,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:24:55,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-10-02 11:24:55,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-10-02 11:24:55,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-10-02 11:24:55,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-10-02 11:24:55,274 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-10-02 11:24:59,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:24:59,036 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-10-02 11:24:59,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-10-02 11:24:59,036 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-10-02 11:24:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:24:59,037 INFO L225 Difference]: With dead ends: 85 [2019-10-02 11:24:59,037 INFO L226 Difference]: Without dead ends: 82 [2019-10-02 11:24:59,037 INFO L640 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 [2019-10-02 11:24:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-02 11:24:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-10-02 11:24:59,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-02 11:24:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-10-02 11:24:59,045 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-10-02 11:24:59,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:24:59,046 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-10-02 11:24:59,046 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-10-02 11:24:59,046 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-10-02 11:24:59,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-02 11:24:59,046 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:24:59,047 INFO L411 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:24:59,047 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:24:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:24:59,047 INFO L82 PathProgramCache]: Analyzing trace with hash -990471360, now seen corresponding path program 65 times [2019-10-02 11:24:59,047 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:24:59,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:24:59,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:59,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:24:59,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:24:59,057 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:24:59,057 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:24:59,057 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:24:59,192 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:24:59,487 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-10-02 11:24:59,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:24:59,496 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-10-02 11:24:59,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:02,088 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:02,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:02,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-10-02 11:25:02,165 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-10-02 11:25:02,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-10-02 11:25:02,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-10-02 11:25:02,166 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-10-02 11:25:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:06,056 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-10-02 11:25:06,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-10-02 11:25:06,057 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-10-02 11:25:06,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:06,058 INFO L225 Difference]: With dead ends: 86 [2019-10-02 11:25:06,058 INFO L226 Difference]: Without dead ends: 83 [2019-10-02 11:25:06,059 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2019-10-02 11:25:06,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-02 11:25:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-02 11:25:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-02 11:25:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-10-02 11:25:06,068 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-10-02 11:25:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:06,068 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-10-02 11:25:06,068 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-10-02 11:25:06,069 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-10-02 11:25:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-02 11:25:06,069 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:06,069 INFO L411 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:06,069 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash -639903546, now seen corresponding path program 66 times [2019-10-02 11:25:06,070 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:06,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:06,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:06,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:06,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:06,079 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:06,079 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:06,079 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:06,221 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:25:09,943 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-10-02 11:25:09,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:09,949 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-10-02 11:25:09,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:12,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:12,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:12,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-10-02 11:25:12,667 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-10-02 11:25:12,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-10-02 11:25:12,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-10-02 11:25:12,668 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-10-02 11:25:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:16,609 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-10-02 11:25:16,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-10-02 11:25:16,609 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-10-02 11:25:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:16,610 INFO L225 Difference]: With dead ends: 87 [2019-10-02 11:25:16,611 INFO L226 Difference]: Without dead ends: 84 [2019-10-02 11:25:16,611 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2019-10-02 11:25:16,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-02 11:25:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-10-02 11:25:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-02 11:25:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-10-02 11:25:16,620 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-10-02 11:25:16,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:16,620 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-10-02 11:25:16,620 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-10-02 11:25:16,620 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-10-02 11:25:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-02 11:25:16,620 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:16,621 INFO L411 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:16,621 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1637764096, now seen corresponding path program 67 times [2019-10-02 11:25:16,621 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:16,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:16,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:16,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:16,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:16,629 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:16,629 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:16,629 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:16,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:25:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:25:17,007 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-10-02 11:25:17,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:19,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:20,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:20,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-10-02 11:25:20,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-10-02 11:25:20,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-10-02 11:25:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-10-02 11:25:20,068 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-10-02 11:25:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:24,092 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-10-02 11:25:24,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-10-02 11:25:24,093 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-10-02 11:25:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:24,093 INFO L225 Difference]: With dead ends: 88 [2019-10-02 11:25:24,094 INFO L226 Difference]: Without dead ends: 85 [2019-10-02 11:25:24,094 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-10-02 11:25:24,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-02 11:25:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-10-02 11:25:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-02 11:25:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-10-02 11:25:24,102 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-10-02 11:25:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:24,103 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-10-02 11:25:24,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-10-02 11:25:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-10-02 11:25:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-02 11:25:24,103 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:24,103 INFO L411 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:24,103 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:24,104 INFO L82 PathProgramCache]: Analyzing trace with hash -768983034, now seen corresponding path program 68 times [2019-10-02 11:25:24,104 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:24,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:24,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:24,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:25:24,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:24,114 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:24,114 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:24,114 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:24,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:25:24,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:25:24,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:24,486 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-10-02 11:25:24,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:27,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:27,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:27,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-10-02 11:25:27,328 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-10-02 11:25:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-10-02 11:25:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-10-02 11:25:27,329 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-10-02 11:25:31,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:31,491 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-10-02 11:25:31,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-10-02 11:25:31,491 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-10-02 11:25:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:31,492 INFO L225 Difference]: With dead ends: 89 [2019-10-02 11:25:31,492 INFO L226 Difference]: Without dead ends: 86 [2019-10-02 11:25:31,493 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2019-10-02 11:25:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-02 11:25:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-10-02 11:25:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-02 11:25:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-10-02 11:25:31,500 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-10-02 11:25:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:31,500 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-10-02 11:25:31,500 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-10-02 11:25:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-10-02 11:25:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-02 11:25:31,500 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:31,501 INFO L411 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:31,501 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:31,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:31,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1931267264, now seen corresponding path program 69 times [2019-10-02 11:25:31,501 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:31,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:31,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:31,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:31,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:31,526 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:31,526 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:31,526 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:31,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:25:37,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-10-02 11:25:37,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:37,659 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-10-02 11:25:37,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:40,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:40,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:40,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-10-02 11:25:40,512 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-10-02 11:25:40,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-10-02 11:25:40,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-10-02 11:25:40,512 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-10-02 11:25:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:44,788 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-10-02 11:25:44,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-10-02 11:25:44,789 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-10-02 11:25:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:44,790 INFO L225 Difference]: With dead ends: 90 [2019-10-02 11:25:44,790 INFO L226 Difference]: Without dead ends: 87 [2019-10-02 11:25:44,791 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2019-10-02 11:25:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-02 11:25:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-10-02 11:25:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-02 11:25:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-10-02 11:25:44,798 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-10-02 11:25:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:44,798 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-10-02 11:25:44,798 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-10-02 11:25:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-10-02 11:25:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-02 11:25:44,799 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:44,799 INFO L411 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:44,799 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash -260319418, now seen corresponding path program 70 times [2019-10-02 11:25:44,800 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:44,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:44,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:44,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:44,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:44,807 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:44,807 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:44,807 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:44,946 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:25:45,953 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:25:45,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:45,958 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-10-02 11:25:45,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:48,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:48,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:48,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-10-02 11:25:48,897 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-10-02 11:25:48,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-10-02 11:25:48,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-10-02 11:25:48,898 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-10-02 11:25:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:25:53,312 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-10-02 11:25:53,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-10-02 11:25:53,312 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-10-02 11:25:53,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:25:53,312 INFO L225 Difference]: With dead ends: 91 [2019-10-02 11:25:53,313 INFO L226 Difference]: Without dead ends: 88 [2019-10-02 11:25:53,313 INFO L640 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 [2019-10-02 11:25:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-02 11:25:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-10-02 11:25:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-02 11:25:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-10-02 11:25:53,322 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-10-02 11:25:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:25:53,322 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-10-02 11:25:53,322 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-10-02 11:25:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-10-02 11:25:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-02 11:25:53,323 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:25:53,323 INFO L411 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:25:53,324 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:25:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:25:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash 519970176, now seen corresponding path program 71 times [2019-10-02 11:25:53,324 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:25:53,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:25:53,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:53,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:25:53,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:25:53,334 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:25:53,334 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:25:53,334 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:25:53,478 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:25:53,836 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-10-02 11:25:53,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:25:53,842 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-10-02 11:25:53,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:25:57,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:25:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:25:57,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:25:57,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-10-02 11:25:57,357 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-10-02 11:25:57,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-10-02 11:25:57,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-10-02 11:25:57,358 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-10-02 11:26:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:01,919 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-10-02 11:26:01,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-10-02 11:26:01,919 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-10-02 11:26:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:01,920 INFO L225 Difference]: With dead ends: 92 [2019-10-02 11:26:01,920 INFO L226 Difference]: Without dead ends: 89 [2019-10-02 11:26:01,921 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2019-10-02 11:26:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-02 11:26:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-10-02 11:26:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-02 11:26:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-10-02 11:26:01,928 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-10-02 11:26:01,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:01,928 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-10-02 11:26:01,928 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-10-02 11:26:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-10-02 11:26:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-02 11:26:01,929 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:01,929 INFO L411 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:01,929 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:01,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:01,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1060856186, now seen corresponding path program 72 times [2019-10-02 11:26:01,930 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:01,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:01,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:01,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:01,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:01,938 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:01,938 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:01,938 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:02,092 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:26:07,325 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-10-02 11:26:07,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:07,336 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-10-02 11:26:07,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:10,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:10,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:10,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-10-02 11:26:10,421 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-10-02 11:26:10,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-10-02 11:26:10,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-10-02 11:26:10,422 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-10-02 11:26:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:15,050 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-10-02 11:26:15,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-10-02 11:26:15,051 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-10-02 11:26:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:15,052 INFO L225 Difference]: With dead ends: 93 [2019-10-02 11:26:15,052 INFO L226 Difference]: Without dead ends: 90 [2019-10-02 11:26:15,053 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-10-02 11:26:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-02 11:26:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-10-02 11:26:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-02 11:26:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-10-02 11:26:15,060 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-10-02 11:26:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:15,060 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-10-02 11:26:15,060 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-10-02 11:26:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-10-02 11:26:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-02 11:26:15,061 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:15,061 INFO L411 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:15,061 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:15,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1473134144, now seen corresponding path program 73 times [2019-10-02 11:26:15,062 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:15,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:15,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:15,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:15,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:15,069 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:15,070 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:15,070 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:15,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:26:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:26:15,492 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-10-02 11:26:15,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:18,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:18,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:18,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-10-02 11:26:18,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-10-02 11:26:18,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-10-02 11:26:18,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-10-02 11:26:18,758 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-10-02 11:26:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:23,608 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-10-02 11:26:23,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-10-02 11:26:23,608 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-10-02 11:26:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:23,609 INFO L225 Difference]: With dead ends: 94 [2019-10-02 11:26:23,609 INFO L226 Difference]: Without dead ends: 91 [2019-10-02 11:26:23,609 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2019-10-02 11:26:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-02 11:26:23,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-10-02 11:26:23,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-02 11:26:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-10-02 11:26:23,615 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-10-02 11:26:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:23,616 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-10-02 11:26:23,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-10-02 11:26:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-10-02 11:26:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-02 11:26:23,616 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:23,616 INFO L411 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:23,617 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:23,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1577544250, now seen corresponding path program 74 times [2019-10-02 11:26:23,617 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:23,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:23,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:23,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:26:23,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:23,625 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:23,626 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:23,626 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:23,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:26:24,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:26:24,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:24,075 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-10-02 11:26:24,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:27,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:27,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:27,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-10-02 11:26:27,473 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-10-02 11:26:27,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-10-02 11:26:27,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-10-02 11:26:27,474 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-10-02 11:26:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:32,190 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-10-02 11:26:32,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-10-02 11:26:32,191 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-10-02 11:26:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:32,192 INFO L225 Difference]: With dead ends: 95 [2019-10-02 11:26:32,192 INFO L226 Difference]: Without dead ends: 92 [2019-10-02 11:26:32,193 INFO L640 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 [2019-10-02 11:26:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-02 11:26:32,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-10-02 11:26:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-02 11:26:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-10-02 11:26:32,200 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-10-02 11:26:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:32,200 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-10-02 11:26:32,200 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-10-02 11:26:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-10-02 11:26:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-02 11:26:32,201 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:32,201 INFO L411 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:32,201 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1659293952, now seen corresponding path program 75 times [2019-10-02 11:26:32,201 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:32,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:32,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:32,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:32,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:32,211 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:32,211 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:32,211 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:32,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:26:38,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-10-02 11:26:38,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:39,000 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-10-02 11:26:39,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:42,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:42,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:42,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-10-02 11:26:42,304 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-10-02 11:26:42,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-10-02 11:26:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-10-02 11:26:42,305 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-10-02 11:26:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:47,242 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-10-02 11:26:47,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-10-02 11:26:47,242 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-10-02 11:26:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:47,243 INFO L225 Difference]: With dead ends: 96 [2019-10-02 11:26:47,243 INFO L226 Difference]: Without dead ends: 93 [2019-10-02 11:26:47,244 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2019-10-02 11:26:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-02 11:26:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-10-02 11:26:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-02 11:26:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-10-02 11:26:47,251 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-10-02 11:26:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:47,251 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-10-02 11:26:47,251 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-10-02 11:26:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-10-02 11:26:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-02 11:26:47,252 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:47,252 INFO L411 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:47,252 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:47,252 INFO L82 PathProgramCache]: Analyzing trace with hash 101432582, now seen corresponding path program 76 times [2019-10-02 11:26:47,252 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:47,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:47,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:47,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:47,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:47,276 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:47,276 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:47,276 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:47,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:26:48,594 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:26:48,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:48,600 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-10-02 11:26:48,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:26:52,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:26:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:26:52,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:26:52,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-10-02 11:26:52,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-10-02 11:26:52,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-10-02 11:26:52,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-10-02 11:26:52,124 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-10-02 11:26:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:26:57,212 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-10-02 11:26:57,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-10-02 11:26:57,213 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-10-02 11:26:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:26:57,214 INFO L225 Difference]: With dead ends: 97 [2019-10-02 11:26:57,214 INFO L226 Difference]: Without dead ends: 94 [2019-10-02 11:26:57,215 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2019-10-02 11:26:57,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-02 11:26:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-10-02 11:26:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-02 11:26:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-10-02 11:26:57,222 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-10-02 11:26:57,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:26:57,222 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-10-02 11:26:57,222 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-10-02 11:26:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-10-02 11:26:57,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-02 11:26:57,223 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:26:57,223 INFO L411 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:26:57,223 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:26:57,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:26:57,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1150619712, now seen corresponding path program 77 times [2019-10-02 11:26:57,223 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:26:57,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:26:57,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:57,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:26:57,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:26:57,233 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:26:57,233 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:26:57,233 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:26:57,393 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:26:57,825 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-10-02 11:26:57,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:26:57,836 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-10-02 11:26:57,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:01,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:01,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:01,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-10-02 11:27:01,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-10-02 11:27:01,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-10-02 11:27:01,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-10-02 11:27:01,275 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-10-02 11:27:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:06,520 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-10-02 11:27:06,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-10-02 11:27:06,521 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-10-02 11:27:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:06,521 INFO L225 Difference]: With dead ends: 98 [2019-10-02 11:27:06,522 INFO L226 Difference]: Without dead ends: 95 [2019-10-02 11:27:06,522 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2019-10-02 11:27:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-02 11:27:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-10-02 11:27:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-02 11:27:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-10-02 11:27:06,530 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-10-02 11:27:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:06,530 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-10-02 11:27:06,530 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-10-02 11:27:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-10-02 11:27:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-02 11:27:06,531 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:06,531 INFO L411 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:06,531 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:06,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:06,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1309535162, now seen corresponding path program 78 times [2019-10-02 11:27:06,531 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:06,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:06,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:06,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:06,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:06,540 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:06,541 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:06,541 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:06,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:27:14,547 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-10-02 11:27:14,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:27:14,553 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-10-02 11:27:14,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:18,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:18,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:18,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-10-02 11:27:18,150 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-10-02 11:27:18,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-10-02 11:27:18,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-10-02 11:27:18,151 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-10-02 11:27:23,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:23,498 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-10-02 11:27:23,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-10-02 11:27:23,499 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-10-02 11:27:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:23,500 INFO L225 Difference]: With dead ends: 99 [2019-10-02 11:27:23,500 INFO L226 Difference]: Without dead ends: 96 [2019-10-02 11:27:23,500 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2019-10-02 11:27:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-02 11:27:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-10-02 11:27:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-02 11:27:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-10-02 11:27:23,509 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-10-02 11:27:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:23,509 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-10-02 11:27:23,509 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-10-02 11:27:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-10-02 11:27:23,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-02 11:27:23,510 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:23,510 INFO L411 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:23,510 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:23,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1940946816, now seen corresponding path program 79 times [2019-10-02 11:27:23,510 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:23,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:23,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:23,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:23,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:23,517 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:23,518 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:23,518 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:23,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:27:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:27:24,021 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-10-02 11:27:24,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:27,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:27,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:27,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-10-02 11:27:27,639 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-10-02 11:27:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-10-02 11:27:27,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-10-02 11:27:27,641 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-10-02 11:27:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:33,097 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-10-02 11:27:33,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-10-02 11:27:33,098 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-10-02 11:27:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:33,099 INFO L225 Difference]: With dead ends: 100 [2019-10-02 11:27:33,099 INFO L226 Difference]: Without dead ends: 97 [2019-10-02 11:27:33,100 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-10-02 11:27:33,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-02 11:27:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-10-02 11:27:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-02 11:27:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-10-02 11:27:33,108 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-10-02 11:27:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:33,108 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-10-02 11:27:33,108 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-10-02 11:27:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-10-02 11:27:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-02 11:27:33,109 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:33,109 INFO L411 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:33,109 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash -39871610, now seen corresponding path program 80 times [2019-10-02 11:27:33,109 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:33,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:33,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:33,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:27:33,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:33,116 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:33,117 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:33,117 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:33,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:27:33,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:27:33,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:27:33,632 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-10-02 11:27:33,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:37,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:37,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:37,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-10-02 11:27:37,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-10-02 11:27:37,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-10-02 11:27:37,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-10-02 11:27:37,316 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-10-02 11:27:42,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:27:42,855 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-10-02 11:27:42,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-10-02 11:27:42,855 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-10-02 11:27:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:27:42,856 INFO L225 Difference]: With dead ends: 101 [2019-10-02 11:27:42,856 INFO L226 Difference]: Without dead ends: 98 [2019-10-02 11:27:42,857 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2019-10-02 11:27:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-02 11:27:42,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-10-02 11:27:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-02 11:27:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-10-02 11:27:42,865 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-10-02 11:27:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:27:42,865 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-10-02 11:27:42,866 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-10-02 11:27:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-10-02 11:27:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-02 11:27:42,866 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:27:42,866 INFO L411 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:27:42,866 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:27:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:27:42,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1236082368, now seen corresponding path program 81 times [2019-10-02 11:27:42,867 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:27:42,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:27:42,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:42,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:27:42,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:27:42,876 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:27:42,876 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:27:42,877 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:27:43,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:27:50,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-10-02 11:27:50,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:27:50,729 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-10-02 11:27:50,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:27:54,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:27:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:27:54,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:27:54,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-10-02 11:27:54,562 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-10-02 11:27:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-10-02 11:27:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-10-02 11:27:54,562 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-10-02 11:28:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:00,337 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-10-02 11:28:00,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-10-02 11:28:00,337 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-10-02 11:28:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:00,338 INFO L225 Difference]: With dead ends: 102 [2019-10-02 11:28:00,338 INFO L226 Difference]: Without dead ends: 99 [2019-10-02 11:28:00,339 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2019-10-02 11:28:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-02 11:28:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-10-02 11:28:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-02 11:28:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-10-02 11:28:00,348 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-10-02 11:28:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:00,348 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-10-02 11:28:00,348 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-10-02 11:28:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-10-02 11:28:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-02 11:28:00,349 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:00,349 INFO L411 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:00,349 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:00,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:00,349 INFO L82 PathProgramCache]: Analyzing trace with hash 336089798, now seen corresponding path program 82 times [2019-10-02 11:28:00,350 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:00,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:00,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:00,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:28:00,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:00,359 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:00,359 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:00,359 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:28:00,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:28:01,928 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:28:01,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:28:01,933 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-10-02 11:28:01,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:05,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:05,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:05,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-10-02 11:28:05,811 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-10-02 11:28:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-10-02 11:28:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-10-02 11:28:05,812 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-10-02 11:28:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:11,695 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-10-02 11:28:11,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-10-02 11:28:11,695 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-10-02 11:28:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:11,696 INFO L225 Difference]: With dead ends: 103 [2019-10-02 11:28:11,696 INFO L226 Difference]: Without dead ends: 100 [2019-10-02 11:28:11,696 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2019-10-02 11:28:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-02 11:28:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-10-02 11:28:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-02 11:28:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-10-02 11:28:11,703 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-10-02 11:28:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:11,704 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-10-02 11:28:11,704 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-10-02 11:28:11,704 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-10-02 11:28:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-02 11:28:11,704 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:11,704 INFO L411 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:11,704 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:11,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1828786688, now seen corresponding path program 83 times [2019-10-02 11:28:11,705 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:11,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:11,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:11,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:28:11,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:11,712 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:11,713 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:11,713 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:28:11,900 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:28:12,425 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-10-02 11:28:12,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:28:12,436 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-10-02 11:28:12,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:16,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:16,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:16,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-10-02 11:28:16,361 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-10-02 11:28:16,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-10-02 11:28:16,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-10-02 11:28:16,362 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-10-02 11:28:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:22,385 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-10-02 11:28:22,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-10-02 11:28:22,385 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-10-02 11:28:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:22,386 INFO L225 Difference]: With dead ends: 104 [2019-10-02 11:28:22,386 INFO L226 Difference]: Without dead ends: 101 [2019-10-02 11:28:22,387 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-10-02 11:28:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-02 11:28:22,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-10-02 11:28:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-02 11:28:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-10-02 11:28:22,395 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-10-02 11:28:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:22,395 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-10-02 11:28:22,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-10-02 11:28:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-10-02 11:28:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-02 11:28:22,396 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:22,396 INFO L411 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:22,396 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:22,396 INFO L82 PathProgramCache]: Analyzing trace with hash 857750022, now seen corresponding path program 84 times [2019-10-02 11:28:22,397 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:22,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:22,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:22,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:28:22,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:22,404 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:22,404 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:22,404 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:28:22,596 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:28:31,550 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-10-02 11:28:31,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:28:31,557 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-10-02 11:28:31,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:35,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:35,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:35,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-10-02 11:28:35,583 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-10-02 11:28:35,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-10-02 11:28:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-10-02 11:28:35,584 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-10-02 11:28:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:41,758 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-10-02 11:28:41,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-10-02 11:28:41,759 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-10-02 11:28:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:41,760 INFO L225 Difference]: With dead ends: 105 [2019-10-02 11:28:41,760 INFO L226 Difference]: Without dead ends: 102 [2019-10-02 11:28:41,761 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2019-10-02 11:28:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-02 11:28:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-10-02 11:28:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-02 11:28:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-10-02 11:28:41,770 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-10-02 11:28:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:41,770 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-10-02 11:28:41,770 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-10-02 11:28:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-10-02 11:28:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-02 11:28:41,771 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:41,771 INFO L411 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:41,771 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:41,772 INFO L82 PathProgramCache]: Analyzing trace with hash 820384448, now seen corresponding path program 85 times [2019-10-02 11:28:41,772 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:41,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:41,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:41,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:28:41,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:41,782 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:41,782 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:41,783 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:28:41,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:28:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:28:42,378 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-10-02 11:28:42,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:46,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:46,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:46,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-10-02 11:28:46,680 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-10-02 11:28:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-10-02 11:28:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-10-02 11:28:46,681 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-10-02 11:28:53,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:28:53,094 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-10-02 11:28:53,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-10-02 11:28:53,095 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-10-02 11:28:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:28:53,096 INFO L225 Difference]: With dead ends: 106 [2019-10-02 11:28:53,096 INFO L226 Difference]: Without dead ends: 103 [2019-10-02 11:28:53,097 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=189, Invalid=8741, Unknown=0, NotChecked=0, Total=8930 [2019-10-02 11:28:53,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-02 11:28:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-10-02 11:28:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-02 11:28:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-10-02 11:28:53,106 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-10-02 11:28:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:28:53,107 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-10-02 11:28:53,107 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-10-02 11:28:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-10-02 11:28:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-02 11:28:53,108 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:28:53,108 INFO L411 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:28:53,108 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:28:53,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:28:53,108 INFO L82 PathProgramCache]: Analyzing trace with hash -337948346, now seen corresponding path program 86 times [2019-10-02 11:28:53,108 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:28:53,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:28:53,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:53,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:28:53,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:28:53,115 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:28:53,115 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:28:53,116 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:28:53,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:28:53,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:28:53,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:28:53,749 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-10-02 11:28:53,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:28:57,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:28:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:28:58,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:28:58,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-10-02 11:28:58,017 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-10-02 11:28:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-10-02 11:28:58,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-10-02 11:28:58,018 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-10-02 11:29:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:04,434 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-10-02 11:29:04,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-10-02 11:29:04,434 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-10-02 11:29:04,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:04,435 INFO L225 Difference]: With dead ends: 107 [2019-10-02 11:29:04,435 INFO L226 Difference]: Without dead ends: 104 [2019-10-02 11:29:04,435 INFO L640 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 [2019-10-02 11:29:04,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-02 11:29:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-10-02 11:29:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-02 11:29:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-10-02 11:29:04,444 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-10-02 11:29:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:04,444 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-10-02 11:29:04,444 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-10-02 11:29:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-10-02 11:29:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-02 11:29:04,444 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:04,444 INFO L411 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:04,445 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1886526592, now seen corresponding path program 87 times [2019-10-02 11:29:04,445 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:04,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:04,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:04,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:04,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:04,458 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:04,459 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:04,459 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:29:04,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:29:13,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-10-02 11:29:13,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:13,542 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-10-02 11:29:13,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:17,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:29:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:17,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:29:17,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-10-02 11:29:17,804 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-10-02 11:29:17,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-10-02 11:29:17,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-10-02 11:29:17,804 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-10-02 11:29:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:24,324 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-10-02 11:29:24,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-10-02 11:29:24,324 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-10-02 11:29:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:24,326 INFO L225 Difference]: With dead ends: 108 [2019-10-02 11:29:24,326 INFO L226 Difference]: Without dead ends: 105 [2019-10-02 11:29:24,326 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-10-02 11:29:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-02 11:29:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-10-02 11:29:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-02 11:29:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-10-02 11:29:24,338 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-10-02 11:29:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:24,338 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-10-02 11:29:24,338 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-10-02 11:29:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-10-02 11:29:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-02 11:29:24,339 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:24,339 INFO L411 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:24,339 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:24,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:24,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1647155334, now seen corresponding path program 88 times [2019-10-02 11:29:24,340 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:24,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:24,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:24,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:24,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:24,351 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:24,351 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:24,351 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:29:24,575 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:29:26,060 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:29:26,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:26,067 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-10-02 11:29:26,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:30,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:29:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:30,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:29:30,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-10-02 11:29:30,389 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-10-02 11:29:30,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-10-02 11:29:30,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-10-02 11:29:30,390 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-10-02 11:29:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:37,053 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-10-02 11:29:37,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-10-02 11:29:37,054 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-10-02 11:29:37,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:37,055 INFO L225 Difference]: With dead ends: 109 [2019-10-02 11:29:37,056 INFO L226 Difference]: Without dead ends: 106 [2019-10-02 11:29:37,056 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-10-02 11:29:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-02 11:29:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-10-02 11:29:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-02 11:29:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-10-02 11:29:37,067 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-10-02 11:29:37,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:37,067 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-10-02 11:29:37,067 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-10-02 11:29:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-10-02 11:29:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-02 11:29:37,068 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:37,068 INFO L411 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:37,069 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash -477854656, now seen corresponding path program 89 times [2019-10-02 11:29:37,069 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:37,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:37,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:37,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:37,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:37,080 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:37,080 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:37,080 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:29:37,298 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:29:37,876 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-10-02 11:29:37,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:29:37,888 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-10-02 11:29:37,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:29:42,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:29:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:29:42,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:29:42,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-10-02 11:29:42,371 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-10-02 11:29:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-10-02 11:29:42,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-10-02 11:29:42,372 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-10-02 11:29:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:29:49,187 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-10-02 11:29:49,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-10-02 11:29:49,188 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-10-02 11:29:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:29:49,189 INFO L225 Difference]: With dead ends: 110 [2019-10-02 11:29:49,189 INFO L226 Difference]: Without dead ends: 107 [2019-10-02 11:29:49,189 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-10-02 11:29:49,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-02 11:29:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-10-02 11:29:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-02 11:29:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-10-02 11:29:49,200 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-10-02 11:29:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:29:49,200 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-10-02 11:29:49,200 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-10-02 11:29:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-10-02 11:29:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-02 11:29:49,201 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:29:49,201 INFO L411 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:29:49,201 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:29:49,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:29:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1928654906, now seen corresponding path program 90 times [2019-10-02 11:29:49,202 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:29:49,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:29:49,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:49,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:29:49,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:29:49,213 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:29:49,213 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:29:49,213 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:29:49,434 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:30:01,267 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-10-02 11:30:01,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:30:01,279 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-10-02 11:30:01,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:30:05,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:30:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:30:05,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:30:05,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-10-02 11:30:05,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-10-02 11:30:05,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-10-02 11:30:05,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-10-02 11:30:05,843 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-10-02 11:30:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:30:12,770 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-10-02 11:30:12,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-10-02 11:30:12,770 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-10-02 11:30:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:30:12,771 INFO L225 Difference]: With dead ends: 111 [2019-10-02 11:30:12,771 INFO L226 Difference]: Without dead ends: 108 [2019-10-02 11:30:12,772 INFO L640 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 [2019-10-02 11:30:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-02 11:30:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-10-02 11:30:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-02 11:30:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-10-02 11:30:12,783 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-10-02 11:30:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:30:12,783 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-10-02 11:30:12,783 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-10-02 11:30:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-10-02 11:30:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-02 11:30:12,784 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:30:12,784 INFO L411 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:30:12,784 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:30:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:30:12,785 INFO L82 PathProgramCache]: Analyzing trace with hash 341177600, now seen corresponding path program 91 times [2019-10-02 11:30:12,785 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:30:12,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:30:12,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:12,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:30:12,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:12,795 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:30:12,795 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:30:12,795 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:30:13,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:30:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:30:13,477 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-10-02 11:30:13,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:30:18,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:30:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:30:18,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:30:18,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-10-02 11:30:18,131 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-10-02 11:30:18,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-10-02 11:30:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-10-02 11:30:18,132 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-10-02 11:30:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:30:25,246 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-10-02 11:30:25,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-10-02 11:30:25,247 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-10-02 11:30:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:30:25,248 INFO L225 Difference]: With dead ends: 112 [2019-10-02 11:30:25,248 INFO L226 Difference]: Without dead ends: 109 [2019-10-02 11:30:25,248 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=201, Invalid=9899, Unknown=0, NotChecked=0, Total=10100 [2019-10-02 11:30:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-02 11:30:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-10-02 11:30:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-02 11:30:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-10-02 11:30:25,260 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-10-02 11:30:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:30:25,261 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-10-02 11:30:25,261 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-10-02 11:30:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-10-02 11:30:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-02 11:30:25,261 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:30:25,261 INFO L411 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:30:25,262 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:30:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:30:25,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1986508550, now seen corresponding path program 92 times [2019-10-02 11:30:25,262 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:30:25,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:30:25,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:25,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:30:25,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:25,273 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:30:25,273 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:30:25,273 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:30:25,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:30:25,965 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:30:25,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:30:25,971 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-10-02 11:30:25,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:30:30,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:30:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:30:30,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:30:30,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-10-02 11:30:30,823 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-10-02 11:30:30,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-10-02 11:30:30,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-10-02 11:30:30,824 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-10-02 11:30:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:30:38,039 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-10-02 11:30:38,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-10-02 11:30:38,039 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-10-02 11:30:38,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:30:38,040 INFO L225 Difference]: With dead ends: 113 [2019-10-02 11:30:38,040 INFO L226 Difference]: Without dead ends: 110 [2019-10-02 11:30:38,041 INFO L640 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 [2019-10-02 11:30:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-02 11:30:38,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-10-02 11:30:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-02 11:30:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-10-02 11:30:38,049 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-10-02 11:30:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:30:38,050 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-10-02 11:30:38,050 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-10-02 11:30:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-10-02 11:30:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-02 11:30:38,051 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:30:38,051 INFO L411 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:30:38,051 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:30:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:30:38,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1452160448, now seen corresponding path program 93 times [2019-10-02 11:30:38,051 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:30:38,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:30:38,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:38,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:30:38,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:30:38,060 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:30:38,060 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:30:38,061 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:30:38,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:31:07,485 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-10-02 11:31:07,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:31:07,501 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-10-02 11:31:07,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:31:12,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:31:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:31:12,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:31:12,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-10-02 11:31:12,309 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-10-02 11:31:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-10-02 11:31:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-10-02 11:31:12,310 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-10-02 11:31:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:31:19,683 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-10-02 11:31:19,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-10-02 11:31:19,684 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-10-02 11:31:19,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:31:19,685 INFO L225 Difference]: With dead ends: 114 [2019-10-02 11:31:19,685 INFO L226 Difference]: Without dead ends: 111 [2019-10-02 11:31:19,685 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-10-02 11:31:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-02 11:31:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-10-02 11:31:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-02 11:31:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-10-02 11:31:19,694 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-10-02 11:31:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:31:19,694 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-10-02 11:31:19,694 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-10-02 11:31:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-10-02 11:31:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-02 11:31:19,695 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:31:19,695 INFO L411 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:31:19,695 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:31:19,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:31:19,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2067238470, now seen corresponding path program 94 times [2019-10-02 11:31:19,696 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:31:19,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:31:19,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:19,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:31:19,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:19,707 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:31:19,707 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:31:19,707 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:31:19,955 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:31:21,687 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:31:21,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:31:21,693 WARN L254 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 407 conjunts are in the unsatisfiable core [2019-10-02 11:31:21,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:31:26,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:31:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:31:26,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:31:26,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2019-10-02 11:31:26,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-10-02 11:31:26,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-10-02 11:31:26,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2019-10-02 11:31:26,567 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 103 states. [2019-10-02 11:31:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:31:34,104 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2019-10-02 11:31:34,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-10-02 11:31:34,104 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 110 [2019-10-02 11:31:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:31:34,105 INFO L225 Difference]: With dead ends: 115 [2019-10-02 11:31:34,105 INFO L226 Difference]: Without dead ends: 112 [2019-10-02 11:31:34,106 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=207, Invalid=10505, Unknown=0, NotChecked=0, Total=10712 [2019-10-02 11:31:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-02 11:31:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-10-02 11:31:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-02 11:31:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2019-10-02 11:31:34,113 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2019-10-02 11:31:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:31:34,114 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2019-10-02 11:31:34,114 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-10-02 11:31:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2019-10-02 11:31:34,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-02 11:31:34,114 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:31:34,114 INFO L411 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:31:34,115 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:31:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:31:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash -340179328, now seen corresponding path program 95 times [2019-10-02 11:31:34,115 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:31:34,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:31:34,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:34,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:31:34,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:34,124 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:31:34,124 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:31:34,124 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:31:34,362 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:31:35,044 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-10-02 11:31:35,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:31:35,056 WARN L254 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 411 conjunts are in the unsatisfiable core [2019-10-02 11:31:35,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:31:39,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:31:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:31:40,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:31:40,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2019-10-02 11:31:40,003 INFO L454 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-10-02 11:31:40,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-10-02 11:31:40,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=10507, Unknown=0, NotChecked=0, Total=10712 [2019-10-02 11:31:40,004 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 104 states. [2019-10-02 11:31:47,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:31:47,674 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2019-10-02 11:31:47,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-10-02 11:31:47,674 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 111 [2019-10-02 11:31:47,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:31:47,675 INFO L225 Difference]: With dead ends: 116 [2019-10-02 11:31:47,676 INFO L226 Difference]: Without dead ends: 113 [2019-10-02 11:31:47,677 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=209, Invalid=10711, Unknown=0, NotChecked=0, Total=10920 [2019-10-02 11:31:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-02 11:31:47,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-10-02 11:31:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-02 11:31:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2019-10-02 11:31:47,687 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2019-10-02 11:31:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:31:47,688 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2019-10-02 11:31:47,688 INFO L476 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-10-02 11:31:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2019-10-02 11:31:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-02 11:31:47,689 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:31:47,689 INFO L411 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:31:47,689 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:31:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:31:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1955687034, now seen corresponding path program 96 times [2019-10-02 11:31:47,689 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:31:47,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:31:47,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:47,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:31:47,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:31:47,701 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:31:47,701 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:31:47,701 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:31:47,943 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:32:03,966 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-10-02 11:32:03,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:32:03,975 WARN L254 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 415 conjunts are in the unsatisfiable core [2019-10-02 11:32:03,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:32:08,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:32:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:32:09,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:32:09,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2019-10-02 11:32:09,007 INFO L454 AbstractCegarLoop]: Interpolant automaton has 105 states [2019-10-02 11:32:09,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2019-10-02 11:32:09,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=10713, Unknown=0, NotChecked=0, Total=10920 [2019-10-02 11:32:09,008 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 105 states. [2019-10-02 11:32:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:32:16,605 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2019-10-02 11:32:16,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2019-10-02 11:32:16,605 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 112 [2019-10-02 11:32:16,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:32:16,606 INFO L225 Difference]: With dead ends: 117 [2019-10-02 11:32:16,606 INFO L226 Difference]: Without dead ends: 114 [2019-10-02 11:32:16,607 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=211, Invalid=10919, Unknown=0, NotChecked=0, Total=11130 [2019-10-02 11:32:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-02 11:32:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2019-10-02 11:32:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-02 11:32:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2019-10-02 11:32:16,616 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2019-10-02 11:32:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:32:16,616 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2019-10-02 11:32:16,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 105 states. [2019-10-02 11:32:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2019-10-02 11:32:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-02 11:32:16,617 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:32:16,617 INFO L411 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:32:16,617 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:32:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:32:16,617 INFO L82 PathProgramCache]: Analyzing trace with hash -496818368, now seen corresponding path program 97 times [2019-10-02 11:32:16,618 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:32:16,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:32:16,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:16,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:32:16,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:16,627 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:32:16,627 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:32:16,628 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:32:16,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:32:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:32:17,392 WARN L254 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 419 conjunts are in the unsatisfiable core [2019-10-02 11:32:17,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:32:22,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:32:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:32:22,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:32:22,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2019-10-02 11:32:22,519 INFO L454 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-10-02 11:32:22,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-10-02 11:32:22,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=10921, Unknown=0, NotChecked=0, Total=11130 [2019-10-02 11:32:22,520 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 106 states. [2019-10-02 11:32:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:32:30,437 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2019-10-02 11:32:30,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2019-10-02 11:32:30,437 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 113 [2019-10-02 11:32:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:32:30,438 INFO L225 Difference]: With dead ends: 118 [2019-10-02 11:32:30,438 INFO L226 Difference]: Without dead ends: 115 [2019-10-02 11:32:30,439 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=213, Invalid=11129, Unknown=0, NotChecked=0, Total=11342 [2019-10-02 11:32:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-02 11:32:30,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-10-02 11:32:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-02 11:32:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2019-10-02 11:32:30,448 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2019-10-02 11:32:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:32:30,449 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2019-10-02 11:32:30,449 INFO L476 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-10-02 11:32:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2019-10-02 11:32:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-02 11:32:30,449 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:32:30,449 INFO L411 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:32:30,449 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:32:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:32:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1778437318, now seen corresponding path program 98 times [2019-10-02 11:32:30,450 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:32:30,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:32:30,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:30,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:32:30,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:30,460 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:32:30,460 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:32:30,460 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:32:30,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:32:31,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:32:31,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:32:31,261 WARN L254 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 423 conjunts are in the unsatisfiable core [2019-10-02 11:32:31,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:32:36,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:32:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:32:36,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:32:36,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2019-10-02 11:32:36,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 107 states [2019-10-02 11:32:36,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2019-10-02 11:32:36,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=11131, Unknown=0, NotChecked=0, Total=11342 [2019-10-02 11:32:36,493 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 107 states. [2019-10-02 11:32:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:32:44,560 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2019-10-02 11:32:44,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2019-10-02 11:32:44,560 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 114 [2019-10-02 11:32:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:32:44,562 INFO L225 Difference]: With dead ends: 119 [2019-10-02 11:32:44,562 INFO L226 Difference]: Without dead ends: 116 [2019-10-02 11:32:44,563 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=215, Invalid=11341, Unknown=0, NotChecked=0, Total=11556 [2019-10-02 11:32:44,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-02 11:32:44,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-10-02 11:32:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-02 11:32:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2019-10-02 11:32:44,575 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2019-10-02 11:32:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:32:44,575 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2019-10-02 11:32:44,575 INFO L476 AbstractCegarLoop]: Interpolant automaton has 107 states. [2019-10-02 11:32:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2019-10-02 11:32:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-02 11:32:44,576 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:32:44,576 INFO L411 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:32:44,576 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:32:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:32:44,576 INFO L82 PathProgramCache]: Analyzing trace with hash -703080448, now seen corresponding path program 99 times [2019-10-02 11:32:44,577 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:32:44,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:32:44,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:44,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:32:44,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:32:44,588 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:32:44,589 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:32:44,589 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:32:44,857 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-02 11:33:08,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2019-10-02 11:33:08,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:08,898 WARN L254 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 427 conjunts are in the unsatisfiable core [2019-10-02 11:33:08,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:14,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:33:14,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:14,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2019-10-02 11:33:14,257 INFO L454 AbstractCegarLoop]: Interpolant automaton has 108 states [2019-10-02 11:33:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2019-10-02 11:33:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=11343, Unknown=0, NotChecked=0, Total=11556 [2019-10-02 11:33:14,258 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 108 states. [2019-10-02 11:33:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:22,523 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2019-10-02 11:33:22,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2019-10-02 11:33:22,523 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 115 [2019-10-02 11:33:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:22,524 INFO L225 Difference]: With dead ends: 120 [2019-10-02 11:33:22,524 INFO L226 Difference]: Without dead ends: 117 [2019-10-02 11:33:22,525 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=217, Invalid=11555, Unknown=0, NotChecked=0, Total=11772 [2019-10-02 11:33:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-02 11:33:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2019-10-02 11:33:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-02 11:33:22,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2019-10-02 11:33:22,536 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2019-10-02 11:33:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:22,536 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2019-10-02 11:33:22,536 INFO L476 AbstractCegarLoop]: Interpolant automaton has 108 states. [2019-10-02 11:33:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2019-10-02 11:33:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-02 11:33:22,537 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:22,537 INFO L411 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:22,537 INFO L418 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash -320719866, now seen corresponding path program 100 times [2019-10-02 11:33:22,537 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:22,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:22,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:22,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:22,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:22,549 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:22,550 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:22,550 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:33:22,814 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 11:33:24,706 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 11:33:24,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:24,713 WARN L254 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 431 conjunts are in the unsatisfiable core [2019-10-02 11:33:24,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:30,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:33:30,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:30,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2019-10-02 11:33:30,222 INFO L454 AbstractCegarLoop]: Interpolant automaton has 109 states [2019-10-02 11:33:30,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2019-10-02 11:33:30,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=11557, Unknown=0, NotChecked=0, Total=11772 [2019-10-02 11:33:30,223 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 109 states. [2019-10-02 11:33:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:38,405 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2019-10-02 11:33:38,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2019-10-02 11:33:38,405 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 116 [2019-10-02 11:33:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:38,406 INFO L225 Difference]: With dead ends: 121 [2019-10-02 11:33:38,406 INFO L226 Difference]: Without dead ends: 118 [2019-10-02 11:33:38,406 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=219, Invalid=11771, Unknown=0, NotChecked=0, Total=11990 [2019-10-02 11:33:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-02 11:33:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-10-02 11:33:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-02 11:33:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2019-10-02 11:33:38,416 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2019-10-02 11:33:38,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:38,416 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2019-10-02 11:33:38,416 INFO L476 AbstractCegarLoop]: Interpolant automaton has 109 states. [2019-10-02 11:33:38,416 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2019-10-02 11:33:38,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-02 11:33:38,417 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:38,417 INFO L411 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:38,417 INFO L418 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:38,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1352443712, now seen corresponding path program 101 times [2019-10-02 11:33:38,417 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:38,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:38,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:38,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:38,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:38,426 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:38,426 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:38,426 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:33:38,710 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-02 11:33:39,492 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2019-10-02 11:33:39,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:33:39,500 WARN L254 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 435 conjunts are in the unsatisfiable core [2019-10-02 11:33:39,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:33:44,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:33:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:33:45,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:33:45,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2019-10-02 11:33:45,116 INFO L454 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-10-02 11:33:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-10-02 11:33:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=11773, Unknown=0, NotChecked=0, Total=11990 [2019-10-02 11:33:45,117 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 110 states. [2019-10-02 11:33:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:33:53,775 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2019-10-02 11:33:53,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2019-10-02 11:33:53,776 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 117 [2019-10-02 11:33:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:33:53,777 INFO L225 Difference]: With dead ends: 122 [2019-10-02 11:33:53,777 INFO L226 Difference]: Without dead ends: 119 [2019-10-02 11:33:53,777 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=221, Invalid=11989, Unknown=0, NotChecked=0, Total=12210 [2019-10-02 11:33:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-02 11:33:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2019-10-02 11:33:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-02 11:33:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2019-10-02 11:33:53,787 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2019-10-02 11:33:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:33:53,787 INFO L475 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2019-10-02 11:33:53,787 INFO L476 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-10-02 11:33:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2019-10-02 11:33:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-02 11:33:53,788 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:33:53,788 INFO L411 BasicCegarLoop]: trace histogram [102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:33:53,788 INFO L418 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:33:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:33:53,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1023855430, now seen corresponding path program 102 times [2019-10-02 11:33:53,789 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:33:53,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:33:53,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:53,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:33:53,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:33:53,800 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:33:53,801 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:33:53,801 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:33:54,082 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-02 11:34:15,792 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2019-10-02 11:34:15,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:34:15,801 WARN L254 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 439 conjunts are in the unsatisfiable core [2019-10-02 11:34:15,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:34:21,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:34:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:34:21,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:34:21,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2019-10-02 11:34:21,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-10-02 11:34:21,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-10-02 11:34:21,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=11991, Unknown=0, NotChecked=0, Total=12210 [2019-10-02 11:34:21,429 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 111 states. [2019-10-02 11:34:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:34:30,160 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2019-10-02 11:34:30,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-10-02 11:34:30,161 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 118 [2019-10-02 11:34:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:34:30,162 INFO L225 Difference]: With dead ends: 123 [2019-10-02 11:34:30,162 INFO L226 Difference]: Without dead ends: 120 [2019-10-02 11:34:30,163 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=223, Invalid=12209, Unknown=0, NotChecked=0, Total=12432 [2019-10-02 11:34:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-02 11:34:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2019-10-02 11:34:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-10-02 11:34:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2019-10-02 11:34:30,175 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2019-10-02 11:34:30,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:34:30,175 INFO L475 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2019-10-02 11:34:30,175 INFO L476 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-10-02 11:34:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2019-10-02 11:34:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-02 11:34:30,176 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:34:30,176 INFO L411 BasicCegarLoop]: trace histogram [103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:34:30,176 INFO L418 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:34:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:34:30,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1674684800, now seen corresponding path program 103 times [2019-10-02 11:34:30,177 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:34:30,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:34:30,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:34:30,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 11:34:30,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:34:30,188 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:34:30,188 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:34:30,188 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:34:30,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:34:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 11:34:31,066 WARN L254 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 443 conjunts are in the unsatisfiable core [2019-10-02 11:34:31,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 11:34:36,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-02 11:34:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 11:34:36,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 11:34:36,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2019-10-02 11:34:36,831 INFO L454 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-10-02 11:34:36,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-10-02 11:34:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=12211, Unknown=0, NotChecked=0, Total=12432 [2019-10-02 11:34:36,832 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 112 states. [2019-10-02 11:34:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 11:34:45,812 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2019-10-02 11:34:45,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2019-10-02 11:34:45,813 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 119 [2019-10-02 11:34:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 11:34:45,814 INFO L225 Difference]: With dead ends: 124 [2019-10-02 11:34:45,814 INFO L226 Difference]: Without dead ends: 121 [2019-10-02 11:34:45,815 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=225, Invalid=12431, Unknown=0, NotChecked=0, Total=12656 [2019-10-02 11:34:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-02 11:34:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2019-10-02 11:34:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-02 11:34:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2019-10-02 11:34:45,826 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2019-10-02 11:34:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 11:34:45,826 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2019-10-02 11:34:45,826 INFO L476 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-10-02 11:34:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2019-10-02 11:34:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-02 11:34:45,827 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 11:34:45,827 INFO L411 BasicCegarLoop]: trace histogram [104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 11:34:45,827 INFO L418 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 11:34:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 11:34:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash 375558790, now seen corresponding path program 104 times [2019-10-02 11:34:45,828 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 11:34:45,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 11:34:45,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:34:45,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 11:34:45,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 11:34:45,839 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 11:34:45,839 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 11:34:45,839 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-02 11:34:46,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-02 11:34:46,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-02 11:34:46,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 11:34:46,735 WARN L254 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 447 conjunts are in the unsatisfiable core [2019-10-02 11:34:46,736 INFO L279 TraceCheckSpWp]: Computing forward predicates...