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/array-examples/standard_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 23:11:30,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 23:11:30,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 23:11:30,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-01 23:11:30,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-01 23:11:30,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-01 23:11:30,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-01 23:11:30,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-01 23:11:30,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-01 23:11:30,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-01 23:11:30,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-01 23:11:30,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-01 23:11:30,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 23:11:30,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 23:11:30,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 23:11:30,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 23:11:30,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 23:11:30,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 23:11:30,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 23:11:30,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 23:11:30,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 23:11:30,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 23:11:30,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 23:11:30,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 23:11:30,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 23:11:30,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 23:11:30,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 23:11:30,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 23:11:30,787 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 [2019-10-01 23:11:30,801 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 23:11:30,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 23:11:30,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 23:11:30,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 23:11:30,803 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 23:11:30,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 23:11:30,804 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 23:11:30,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 23:11:30,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 23:11:30,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 23:11:30,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 23:11:30,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 23:11:30,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 23:11:30,805 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 23:11:30,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 23:11:30,805 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 23:11:30,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 23:11:30,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 23:11:30,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 23:11:30,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 23:11:30,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 23:11:30,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 23:11:30,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 23:11:30,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 23:11:30,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 23:11:30,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 23:11:30,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 23:11:30,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 23:11:30,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 23:11:30,835 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 23:11:30,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 23:11:30,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 23:11:30,852 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 23:11:30,852 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 23:11:30,853 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-10-01 23:11:30,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/514c5d382/a956da36ea194926bc3ff2794079aee3/FLAGc91ddcf24 [2019-10-01 23:11:31,339 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 23:11:31,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-10-01 23:11:31,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/514c5d382/a956da36ea194926bc3ff2794079aee3/FLAGc91ddcf24 [2019-10-01 23:11:31,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/514c5d382/a956da36ea194926bc3ff2794079aee3 [2019-10-01 23:11:31,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 23:11:31,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 23:11:31,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 23:11:31,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 23:11:31,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 23:11:31,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:11:31" (1/1) ... [2019-10-01 23:11:31,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d534ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:31, skipping insertion in model container [2019-10-01 23:11:31,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:11:31" (1/1) ... [2019-10-01 23:11:31,761 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 23:11:31,779 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 23:11:31,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:11:31,981 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 23:11:32,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:11:32,127 INFO L192 MainTranslator]: Completed translation [2019-10-01 23:11:32,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:32 WrapperNode [2019-10-01 23:11:32,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 23:11:32,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 23:11:32,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 23:11:32,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 23:11:32,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:32" (1/1) ... [2019-10-01 23:11:32,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:32" (1/1) ... [2019-10-01 23:11:32,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:32" (1/1) ... [2019-10-01 23:11:32,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:32" (1/1) ... [2019-10-01 23:11:32,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:32" (1/1) ... [2019-10-01 23:11:32,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:32" (1/1) ... [2019-10-01 23:11:32,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:32" (1/1) ... [2019-10-01 23:11:32,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 23:11:32,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 23:11:32,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 23:11:32,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 23:11:32,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:32" (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 [2019-10-01 23:11:32,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 23:11:32,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 23:11:32,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 23:11:32,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 23:11:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 23:11:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 23:11:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 23:11:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 23:11:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 23:11:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 23:11:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 23:11:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 23:11:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 23:11:32,520 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 23:11:32,520 INFO L283 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-01 23:11:32,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:11:32 BoogieIcfgContainer [2019-10-01 23:11:32,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 23:11:32,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 23:11:32,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 23:11:32,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 23:11:32,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 11:11:31" (1/3) ... [2019-10-01 23:11:32,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7226e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:11:32, skipping insertion in model container [2019-10-01 23:11:32,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:11:32" (2/3) ... [2019-10-01 23:11:32,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7226e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:11:32, skipping insertion in model container [2019-10-01 23:11:32,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:11:32" (3/3) ... [2019-10-01 23:11:32,542 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2019-10-01 23:11:32,556 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 23:11:32,569 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 23:11:32,585 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 23:11:32,611 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 23:11:32,612 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 23:11:32,612 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 23:11:32,612 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 23:11:32,612 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 23:11:32,612 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 23:11:32,612 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 23:11:32,613 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 23:11:32,613 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 23:11:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-01 23:11:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-01 23:11:32,635 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:32,636 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:32,638 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:32,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1721973062, now seen corresponding path program 1 times [2019-10-01 23:11:32,645 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:32,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:32,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:32,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:11:32,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:11:32,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:11:32,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 23:11:32,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 23:11:32,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 23:11:32,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 23:11:32,811 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-10-01 23:11:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:32,837 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-10-01 23:11:32,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 23:11:32,838 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2019-10-01 23:11:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:32,846 INFO L225 Difference]: With dead ends: 55 [2019-10-01 23:11:32,847 INFO L226 Difference]: Without dead ends: 26 [2019-10-01 23:11:32,850 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 23:11:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-01 23:11:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-01 23:11:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-01 23:11:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-01 23:11:32,890 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2019-10-01 23:11:32,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:32,891 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-01 23:11:32,891 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 23:11:32,891 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-01 23:11:32,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-01 23:11:32,892 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:32,892 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:32,892 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash -13266878, now seen corresponding path program 1 times [2019-10-01 23:11:32,893 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:32,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:32,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:32,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:11:32,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:11:32,949 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:11:32,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 23:11:32,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 23:11:32,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 23:11:32,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:11:32,951 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 3 states. [2019-10-01 23:11:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:33,010 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2019-10-01 23:11:33,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 23:11:33,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-10-01 23:11:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:33,012 INFO L225 Difference]: With dead ends: 50 [2019-10-01 23:11:33,013 INFO L226 Difference]: Without dead ends: 31 [2019-10-01 23:11:33,014 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:11:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-01 23:11:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-01 23:11:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-01 23:11:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-01 23:11:33,023 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-10-01 23:11:33,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:33,023 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-01 23:11:33,023 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 23:11:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-01 23:11:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-01 23:11:33,025 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:33,025 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:33,025 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:33,026 INFO L82 PathProgramCache]: Analyzing trace with hash -927642988, now seen corresponding path program 1 times [2019-10-01 23:11:33,026 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:33,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:33,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:33,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:11:33,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-01 23:11:33,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:33,133 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 -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 23:11:33,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:33,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:11:33,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-01 23:11:33,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:33,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-01 23:11:33,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:11:33,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:11:33,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:11:33,268 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2019-10-01 23:11:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:33,360 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-10-01 23:11:33,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:11:33,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-10-01 23:11:33,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:33,362 INFO L225 Difference]: With dead ends: 59 [2019-10-01 23:11:33,362 INFO L226 Difference]: Without dead ends: 36 [2019-10-01 23:11:33,363 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:11:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-01 23:11:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-01 23:11:33,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-01 23:11:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-01 23:11:33,371 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2019-10-01 23:11:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:33,371 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-01 23:11:33,371 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:11:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-01 23:11:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-01 23:11:33,372 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:33,373 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:33,373 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:33,373 INFO L82 PathProgramCache]: Analyzing trace with hash -681366654, now seen corresponding path program 2 times [2019-10-01 23:11:33,374 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:33,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:33,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:33,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:11:33,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-01 23:11:33,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:33,458 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:33,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:11:33,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:11:33,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:11:33,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 23:11:33,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-01 23:11:33,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:33,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-01 23:11:33,554 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 23:11:33,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 23:11:33,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:11:33,555 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2019-10-01 23:11:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:33,652 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-10-01 23:11:33,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 23:11:33,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-10-01 23:11:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:33,654 INFO L225 Difference]: With dead ends: 68 [2019-10-01 23:11:33,655 INFO L226 Difference]: Without dead ends: 41 [2019-10-01 23:11:33,656 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:11:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-01 23:11:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-01 23:11:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-01 23:11:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-01 23:11:33,671 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2019-10-01 23:11:33,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:33,672 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-01 23:11:33,672 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 23:11:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-01 23:11:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-01 23:11:33,675 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:33,675 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:33,675 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:33,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1000479276, now seen corresponding path program 3 times [2019-10-01 23:11:33,677 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:33,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:33,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:33,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:11:33,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-01 23:11:33,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:33,844 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:33,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:11:33,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-01 23:11:33,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:11:33,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 23:11:33,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:11:33,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:33,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-01 23:11:33,929 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-01 23:11:33,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-01 23:11:33,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:11:33,930 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 7 states. [2019-10-01 23:11:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:34,023 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2019-10-01 23:11:34,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 23:11:34,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-10-01 23:11:34,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:34,024 INFO L225 Difference]: With dead ends: 77 [2019-10-01 23:11:34,024 INFO L226 Difference]: Without dead ends: 46 [2019-10-01 23:11:34,025 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:11:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-01 23:11:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-01 23:11:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-01 23:11:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-10-01 23:11:34,033 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 36 [2019-10-01 23:11:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:34,034 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-10-01 23:11:34,034 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-01 23:11:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-10-01 23:11:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-01 23:11:34,035 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:34,035 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:34,036 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:34,036 INFO L82 PathProgramCache]: Analyzing trace with hash 631314114, now seen corresponding path program 4 times [2019-10-01 23:11:34,036 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:34,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:34,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:34,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:11:34,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-01 23:11:34,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:34,139 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:34,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:11:34,195 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:11:34,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:11:34,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 23:11:34,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:11:34,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:34,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-01 23:11:34,223 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-01 23:11:34,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-01 23:11:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-01 23:11:34,224 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2019-10-01 23:11:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:34,309 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-10-01 23:11:34,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 23:11:34,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-10-01 23:11:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:34,311 INFO L225 Difference]: With dead ends: 86 [2019-10-01 23:11:34,311 INFO L226 Difference]: Without dead ends: 51 [2019-10-01 23:11:34,312 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-01 23:11:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-01 23:11:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-01 23:11:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-01 23:11:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-10-01 23:11:34,322 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 41 [2019-10-01 23:11:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:34,322 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-10-01 23:11:34,322 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-01 23:11:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-10-01 23:11:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-01 23:11:34,324 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:34,326 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:34,327 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:34,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1809092332, now seen corresponding path program 5 times [2019-10-01 23:11:34,327 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:34,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:34,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:34,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:11:34,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-01 23:11:34,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:34,457 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 -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 23:11:34,476 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:35,645 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-01 23:11:35,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:11:35,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-01 23:11:35,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-01 23:11:35,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:35,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-01 23:11:35,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-01 23:11:35,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-01 23:11:35,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 23:11:35,679 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 9 states. [2019-10-01 23:11:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:35,760 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2019-10-01 23:11:35,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-01 23:11:35,762 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-10-01 23:11:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:35,763 INFO L225 Difference]: With dead ends: 95 [2019-10-01 23:11:35,764 INFO L226 Difference]: Without dead ends: 56 [2019-10-01 23:11:35,764 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 23:11:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-01 23:11:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-01 23:11:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-01 23:11:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-10-01 23:11:35,772 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 46 [2019-10-01 23:11:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:35,772 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-10-01 23:11:35,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-01 23:11:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-10-01 23:11:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-01 23:11:35,774 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:35,774 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:35,774 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2091864578, now seen corresponding path program 6 times [2019-10-01 23:11:35,776 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:35,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:35,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:35,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:11:35,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-01 23:11:35,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:35,959 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 23:11:35,994 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:36,483 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-01 23:11:36,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:11:36,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-01 23:11:36,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-01 23:11:36,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:36,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-10-01 23:11:36,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-01 23:11:36,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-01 23:11:36,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 23:11:36,525 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 10 states. [2019-10-01 23:11:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:36,645 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2019-10-01 23:11:36,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-01 23:11:36,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2019-10-01 23:11:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:36,646 INFO L225 Difference]: With dead ends: 104 [2019-10-01 23:11:36,647 INFO L226 Difference]: Without dead ends: 61 [2019-10-01 23:11:36,648 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 23:11:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-01 23:11:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-01 23:11:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-01 23:11:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2019-10-01 23:11:36,656 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 51 [2019-10-01 23:11:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:36,656 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2019-10-01 23:11:36,656 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-01 23:11:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2019-10-01 23:11:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-01 23:11:36,657 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:36,658 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:36,658 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:36,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:36,658 INFO L82 PathProgramCache]: Analyzing trace with hash -591532972, now seen corresponding path program 7 times [2019-10-01 23:11:36,659 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:36,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:36,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:36,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:11:36,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-01 23:11:36,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:36,754 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:36,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:11:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:36,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-01 23:11:36,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-01 23:11:36,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:36,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-10-01 23:11:36,847 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-01 23:11:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-01 23:11:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 23:11:36,848 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 11 states. [2019-10-01 23:11:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:36,951 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2019-10-01 23:11:36,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-01 23:11:36,952 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-10-01 23:11:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:36,953 INFO L225 Difference]: With dead ends: 113 [2019-10-01 23:11:36,953 INFO L226 Difference]: Without dead ends: 66 [2019-10-01 23:11:36,954 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 23:11:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-01 23:11:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-10-01 23:11:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-01 23:11:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2019-10-01 23:11:36,961 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 56 [2019-10-01 23:11:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:36,961 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2019-10-01 23:11:36,961 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-01 23:11:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2019-10-01 23:11:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-01 23:11:36,963 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:36,963 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:36,963 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:36,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:36,964 INFO L82 PathProgramCache]: Analyzing trace with hash 642637122, now seen corresponding path program 8 times [2019-10-01 23:11:36,964 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:36,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:36,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:36,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:11:36,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-01 23:11:37,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:37,086 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 -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 23:11:37,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:37,165 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:11:37,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:11:37,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-01 23:11:37,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-01 23:11:37,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:37,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-10-01 23:11:37,197 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-01 23:11:37,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-01 23:11:37,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-01 23:11:37,199 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 12 states. [2019-10-01 23:11:37,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:37,291 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-10-01 23:11:37,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-01 23:11:37,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2019-10-01 23:11:37,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:37,292 INFO L225 Difference]: With dead ends: 122 [2019-10-01 23:11:37,293 INFO L226 Difference]: Without dead ends: 71 [2019-10-01 23:11:37,293 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-01 23:11:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-01 23:11:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-01 23:11:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-01 23:11:37,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2019-10-01 23:11:37,301 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 61 [2019-10-01 23:11:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:37,302 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2019-10-01 23:11:37,302 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-01 23:11:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2019-10-01 23:11:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-01 23:11:37,303 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:37,304 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:37,304 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:37,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1682614380, now seen corresponding path program 9 times [2019-10-01 23:11:37,305 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:37,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:37,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:37,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:11:37,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-01 23:11:37,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:37,460 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:37,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:11:43,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-01 23:11:43,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:11:43,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-01 23:11:43,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-01 23:11:43,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:43,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-10-01 23:11:43,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-01 23:11:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-01 23:11:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-01 23:11:43,135 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 13 states. [2019-10-01 23:11:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:43,242 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2019-10-01 23:11:43,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-01 23:11:43,242 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2019-10-01 23:11:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:43,243 INFO L225 Difference]: With dead ends: 131 [2019-10-01 23:11:43,243 INFO L226 Difference]: Without dead ends: 76 [2019-10-01 23:11:43,244 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-01 23:11:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-01 23:11:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-10-01 23:11:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-01 23:11:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2019-10-01 23:11:43,252 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 66 [2019-10-01 23:11:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:43,252 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2019-10-01 23:11:43,252 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-01 23:11:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2019-10-01 23:11:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-01 23:11:43,254 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:43,254 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:43,254 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash 591181954, now seen corresponding path program 10 times [2019-10-01 23:11:43,255 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:43,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:43,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:43,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:11:43,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-01 23:11:43,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:43,383 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:43,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:11:43,460 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:11:43,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:11:43,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-01 23:11:43,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-01 23:11:43,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:43,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-10-01 23:11:43,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-01 23:11:43,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-01 23:11:43,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 23:11:43,496 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 14 states. [2019-10-01 23:11:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:43,596 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2019-10-01 23:11:43,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-01 23:11:43,602 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-10-01 23:11:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:43,603 INFO L225 Difference]: With dead ends: 140 [2019-10-01 23:11:43,603 INFO L226 Difference]: Without dead ends: 81 [2019-10-01 23:11:43,604 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 23:11:43,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-01 23:11:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-10-01 23:11:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-01 23:11:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2019-10-01 23:11:43,611 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2019-10-01 23:11:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:43,611 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2019-10-01 23:11:43,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-01 23:11:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2019-10-01 23:11:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-01 23:11:43,612 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:43,613 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:43,613 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:43,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:43,613 INFO L82 PathProgramCache]: Analyzing trace with hash 665957076, now seen corresponding path program 11 times [2019-10-01 23:11:43,613 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:43,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:43,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:43,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:11:43,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-10-01 23:11:43,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:43,854 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:43,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:12:14,361 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-01 23:12:14,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:14,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-01 23:12:14,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-10-01 23:12:14,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:14,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-10-01 23:12:14,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-01 23:12:14,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-01 23:12:14,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-01 23:12:14,424 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 15 states. [2019-10-01 23:12:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:14,568 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2019-10-01 23:12:14,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-01 23:12:14,570 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2019-10-01 23:12:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:14,571 INFO L225 Difference]: With dead ends: 149 [2019-10-01 23:12:14,571 INFO L226 Difference]: Without dead ends: 86 [2019-10-01 23:12:14,572 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-01 23:12:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-01 23:12:14,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-10-01 23:12:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-01 23:12:14,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2019-10-01 23:12:14,582 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 76 [2019-10-01 23:12:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:14,584 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2019-10-01 23:12:14,584 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-01 23:12:14,584 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2019-10-01 23:12:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-01 23:12:14,587 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:14,590 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:12:14,590 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash 725345218, now seen corresponding path program 12 times [2019-10-01 23:12:14,591 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:14,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:14,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:14,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:14,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-10-01 23:12:14,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:14,816 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:12:14,850 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:12:33,223 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-01 23:12:33,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:33,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-01 23:12:33,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 12 proven. 78 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-10-01 23:12:33,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:33,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2019-10-01 23:12:33,300 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-01 23:12:33,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-01 23:12:33,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 23:12:33,301 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 17 states. [2019-10-01 23:12:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:33,474 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2019-10-01 23:12:33,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-01 23:12:33,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2019-10-01 23:12:33,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:33,476 INFO L225 Difference]: With dead ends: 158 [2019-10-01 23:12:33,476 INFO L226 Difference]: Without dead ends: 91 [2019-10-01 23:12:33,477 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 23:12:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-01 23:12:33,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-10-01 23:12:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-01 23:12:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2019-10-01 23:12:33,494 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 81 [2019-10-01 23:12:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:33,494 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2019-10-01 23:12:33,494 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-01 23:12:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2019-10-01 23:12:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-01 23:12:33,495 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:33,495 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:12:33,496 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:33,496 INFO L82 PathProgramCache]: Analyzing trace with hash 810745364, now seen corresponding path program 13 times [2019-10-01 23:12:33,496 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:33,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:33,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:33,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:33,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-10-01 23:12:33,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:33,685 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:12:33,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:12:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:33,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-01 23:12:33,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-10-01 23:12:33,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:33,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-10-01 23:12:33,796 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-01 23:12:33,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-01 23:12:33,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 23:12:33,797 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 17 states. [2019-10-01 23:12:33,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:33,927 INFO L93 Difference]: Finished difference Result 167 states and 181 transitions. [2019-10-01 23:12:33,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-01 23:12:33,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 86 [2019-10-01 23:12:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:33,930 INFO L225 Difference]: With dead ends: 167 [2019-10-01 23:12:33,930 INFO L226 Difference]: Without dead ends: 96 [2019-10-01 23:12:33,930 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 23:12:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-01 23:12:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-10-01 23:12:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-01 23:12:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2019-10-01 23:12:33,936 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 86 [2019-10-01 23:12:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:33,937 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2019-10-01 23:12:33,937 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-01 23:12:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2019-10-01 23:12:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-01 23:12:33,938 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:33,938 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:12:33,938 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:33,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:33,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1391763710, now seen corresponding path program 14 times [2019-10-01 23:12:33,939 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:33,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:33,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:33,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:12:33,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2019-10-01 23:12:34,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:34,128 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 -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 23:12:34,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:12:34,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:12:34,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:34,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-01 23:12:34,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2019-10-01 23:12:34,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:34,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-10-01 23:12:34,266 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-01 23:12:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-01 23:12:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-01 23:12:34,267 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 18 states. [2019-10-01 23:12:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:34,437 INFO L93 Difference]: Finished difference Result 176 states and 190 transitions. [2019-10-01 23:12:34,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-01 23:12:34,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-10-01 23:12:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:34,441 INFO L225 Difference]: With dead ends: 176 [2019-10-01 23:12:34,441 INFO L226 Difference]: Without dead ends: 101 [2019-10-01 23:12:34,442 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-01 23:12:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-01 23:12:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-10-01 23:12:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-01 23:12:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2019-10-01 23:12:34,448 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 91 [2019-10-01 23:12:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:34,448 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2019-10-01 23:12:34,449 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-01 23:12:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2019-10-01 23:12:34,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-01 23:12:34,450 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:34,450 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:12:34,451 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:34,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1103546028, now seen corresponding path program 15 times [2019-10-01 23:12:34,451 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:34,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:34,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:34,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:34,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2019-10-01 23:12:34,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:34,711 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 -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 23:12:34,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:13:00,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-01 23:13:00,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:13:00,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-01 23:13:00,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:13:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 30 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-10-01 23:13:00,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:13:00,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2019-10-01 23:13:00,611 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 23:13:00,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 23:13:00,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 23:13:00,613 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 20 states. [2019-10-01 23:13:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:13:00,813 INFO L93 Difference]: Finished difference Result 185 states and 199 transitions. [2019-10-01 23:13:00,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 23:13:00,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 96 [2019-10-01 23:13:00,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:13:00,815 INFO L225 Difference]: With dead ends: 185 [2019-10-01 23:13:00,815 INFO L226 Difference]: Without dead ends: 106 [2019-10-01 23:13:00,816 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 23:13:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-01 23:13:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-10-01 23:13:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-01 23:13:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2019-10-01 23:13:00,822 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 96 [2019-10-01 23:13:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:13:00,822 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2019-10-01 23:13:00,822 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 23:13:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2019-10-01 23:13:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-01 23:13:00,823 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:13:00,823 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:13:00,824 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:13:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:13:00,824 INFO L82 PathProgramCache]: Analyzing trace with hash -831837630, now seen corresponding path program 16 times [2019-10-01 23:13:00,824 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:13:00,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:13:00,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:00,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:13:00,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:13:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-01 23:13:01,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:13:01,047 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:13:01,080 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:13:01,143 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:13:01,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:13:01,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-01 23:13:01,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:13:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-01 23:13:01,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:13:01,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-10-01 23:13:01,171 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 23:13:01,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 23:13:01,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 23:13:01,172 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 20 states. [2019-10-01 23:13:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:13:01,346 INFO L93 Difference]: Finished difference Result 194 states and 208 transitions. [2019-10-01 23:13:01,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 23:13:01,347 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2019-10-01 23:13:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:13:01,348 INFO L225 Difference]: With dead ends: 194 [2019-10-01 23:13:01,348 INFO L226 Difference]: Without dead ends: 111 [2019-10-01 23:13:01,348 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 23:13:01,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-01 23:13:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-10-01 23:13:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-01 23:13:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2019-10-01 23:13:01,354 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 101 [2019-10-01 23:13:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:13:01,354 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2019-10-01 23:13:01,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 23:13:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2019-10-01 23:13:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-01 23:13:01,356 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:13:01,356 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:13:01,356 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:13:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:13:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash 855925908, now seen corresponding path program 17 times [2019-10-01 23:13:01,357 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:13:01,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:13:01,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:01,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:13:01,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:13:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2019-10-01 23:13:01,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:13:01,596 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:13:01,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:14:22,678 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-01 23:14:22,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:14:22,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-01 23:14:22,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:14:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2019-10-01 23:14:22,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:14:22,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-10-01 23:14:22,781 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-01 23:14:22,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-01 23:14:22,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 23:14:22,781 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand 21 states. [2019-10-01 23:14:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:14:22,941 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2019-10-01 23:14:22,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-01 23:14:22,944 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2019-10-01 23:14:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:14:22,945 INFO L225 Difference]: With dead ends: 203 [2019-10-01 23:14:22,945 INFO L226 Difference]: Without dead ends: 116 [2019-10-01 23:14:22,947 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 23:14:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-01 23:14:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-10-01 23:14:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-01 23:14:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2019-10-01 23:14:22,952 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 106 [2019-10-01 23:14:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:14:22,953 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2019-10-01 23:14:22,953 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-01 23:14:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2019-10-01 23:14:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-01 23:14:22,954 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:14:22,954 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:14:22,954 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:14:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:14:22,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1813726594, now seen corresponding path program 18 times [2019-10-01 23:14:22,955 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:14:22,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:14:22,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:14:22,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:14:22,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:14:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:14:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2019-10-01 23:14:23,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:14:23,258 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 -t:12000 (exit command is (exit), workingDir is null) [2019-10-01 23:14:23,282 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:15:12,669 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-01 23:15:12,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:15:12,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-01 23:15:12,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:15:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2019-10-01 23:15:12,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:15:12,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-10-01 23:15:12,752 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-01 23:15:12,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-01 23:15:12,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 23:15:12,753 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand 22 states. [2019-10-01 23:15:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:15:12,931 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2019-10-01 23:15:12,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-01 23:15:12,931 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2019-10-01 23:15:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:15:12,932 INFO L225 Difference]: With dead ends: 212 [2019-10-01 23:15:12,932 INFO L226 Difference]: Without dead ends: 121 [2019-10-01 23:15:12,933 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 23:15:12,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-01 23:15:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2019-10-01 23:15:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-01 23:15:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2019-10-01 23:15:12,938 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 111 [2019-10-01 23:15:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:15:12,938 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2019-10-01 23:15:12,938 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-01 23:15:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2019-10-01 23:15:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-01 23:15:12,939 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:15:12,939 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:15:12,939 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:15:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:15:12,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1230274516, now seen corresponding path program 19 times [2019-10-01 23:15:12,940 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:15:12,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:15:12,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:15:12,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:15:12,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:15:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:15:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-10-01 23:15:13,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:15:13,324 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:15:13,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:15:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:15:13,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-01 23:15:13,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:15:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-10-01 23:15:13,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:15:13,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-10-01 23:15:13,488 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-01 23:15:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-01 23:15:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-01 23:15:13,489 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 23 states. [2019-10-01 23:15:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:15:13,715 INFO L93 Difference]: Finished difference Result 221 states and 235 transitions. [2019-10-01 23:15:13,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-01 23:15:13,716 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2019-10-01 23:15:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:15:13,717 INFO L225 Difference]: With dead ends: 221 [2019-10-01 23:15:13,717 INFO L226 Difference]: Without dead ends: 126 [2019-10-01 23:15:13,718 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-01 23:15:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-01 23:15:13,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2019-10-01 23:15:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-01 23:15:13,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2019-10-01 23:15:13,727 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 116 [2019-10-01 23:15:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:15:13,730 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2019-10-01 23:15:13,730 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-01 23:15:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2019-10-01 23:15:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-01 23:15:13,732 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:15:13,732 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:15:13,732 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:15:13,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:15:13,733 INFO L82 PathProgramCache]: Analyzing trace with hash 433828034, now seen corresponding path program 20 times [2019-10-01 23:15:13,733 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:15:13,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:15:13,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:15:13,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:15:13,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:15:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:15:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-01 23:15:14,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:15:14,074 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:15:14,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:15:14,191 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:15:14,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:15:14,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-01 23:15:14,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:15:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-10-01 23:15:14,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:15:14,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-10-01 23:15:14,217 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-01 23:15:14,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-01 23:15:14,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-01 23:15:14,218 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 24 states. [2019-10-01 23:15:14,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:15:14,436 INFO L93 Difference]: Finished difference Result 230 states and 244 transitions. [2019-10-01 23:15:14,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-01 23:15:14,438 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2019-10-01 23:15:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:15:14,439 INFO L225 Difference]: With dead ends: 230 [2019-10-01 23:15:14,439 INFO L226 Difference]: Without dead ends: 131 [2019-10-01 23:15:14,439 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-01 23:15:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-10-01 23:15:14,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2019-10-01 23:15:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-01 23:15:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2019-10-01 23:15:14,443 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 121 [2019-10-01 23:15:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:15:14,444 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2019-10-01 23:15:14,444 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-01 23:15:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2019-10-01 23:15:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-01 23:15:14,445 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:15:14,445 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:15:14,446 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:15:14,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:15:14,446 INFO L82 PathProgramCache]: Analyzing trace with hash 348752660, now seen corresponding path program 21 times [2019-10-01 23:15:14,446 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:15:14,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:15:14,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:15:14,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:15:14,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:15:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:15:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2019-10-01 23:15:14,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:15:14,752 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:15:14,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:16:08,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-01 23:16:08,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:16:08,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-01 23:16:08,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:16:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2019-10-01 23:16:08,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:16:08,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-10-01 23:16:08,504 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-01 23:16:08,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-01 23:16:08,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-01 23:16:08,505 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand 25 states. [2019-10-01 23:16:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:16:08,702 INFO L93 Difference]: Finished difference Result 239 states and 253 transitions. [2019-10-01 23:16:08,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-01 23:16:08,704 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-01 23:16:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:16:08,705 INFO L225 Difference]: With dead ends: 239 [2019-10-01 23:16:08,705 INFO L226 Difference]: Without dead ends: 136 [2019-10-01 23:16:08,706 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-01 23:16:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-01 23:16:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2019-10-01 23:16:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-01 23:16:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2019-10-01 23:16:08,711 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 126 [2019-10-01 23:16:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:16:08,712 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2019-10-01 23:16:08,712 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-01 23:16:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2019-10-01 23:16:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-01 23:16:08,713 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:16:08,713 INFO L411 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:16:08,714 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:16:08,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:16:08,714 INFO L82 PathProgramCache]: Analyzing trace with hash 577530882, now seen corresponding path program 22 times [2019-10-01 23:16:08,714 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:16:08,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:16:08,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:16:08,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:16:08,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:16:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:16:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-10-01 23:16:09,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:16:09,148 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:16:09,206 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:16:09,308 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:16:09,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:16:09,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-01 23:16:09,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:16:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-10-01 23:16:09,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:16:09,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-10-01 23:16:09,372 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 23:16:09,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 23:16:09,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 23:16:09,383 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand 26 states. [2019-10-01 23:16:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:16:09,581 INFO L93 Difference]: Finished difference Result 248 states and 262 transitions. [2019-10-01 23:16:09,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-01 23:16:09,581 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2019-10-01 23:16:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:16:09,582 INFO L225 Difference]: With dead ends: 248 [2019-10-01 23:16:09,583 INFO L226 Difference]: Without dead ends: 141 [2019-10-01 23:16:09,583 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 23:16:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-01 23:16:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2019-10-01 23:16:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-01 23:16:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2019-10-01 23:16:09,589 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 131 [2019-10-01 23:16:09,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:16:09,590 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2019-10-01 23:16:09,590 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 23:16:09,590 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2019-10-01 23:16:09,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-01 23:16:09,592 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:16:09,592 INFO L411 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:16:09,592 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:16:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:16:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash 33785428, now seen corresponding path program 23 times [2019-10-01 23:16:09,593 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:16:09,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:16:09,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:16:09,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:16:09,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:16:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:16:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2019-10-01 23:16:10,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:16:10,089 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:16:10,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:18:02,799 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-01 23:18:02,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:18:02,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-01 23:18:02,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:18:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2019-10-01 23:18:02,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:18:02,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-10-01 23:18:02,969 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-01 23:18:02,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-01 23:18:02,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-10-01 23:18:02,970 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 27 states. [2019-10-01 23:18:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:18:03,243 INFO L93 Difference]: Finished difference Result 257 states and 271 transitions. [2019-10-01 23:18:03,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-01 23:18:03,245 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2019-10-01 23:18:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:18:03,246 INFO L225 Difference]: With dead ends: 257 [2019-10-01 23:18:03,246 INFO L226 Difference]: Without dead ends: 146 [2019-10-01 23:18:03,248 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-10-01 23:18:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-01 23:18:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2019-10-01 23:18:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-10-01 23:18:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2019-10-01 23:18:03,256 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 136 [2019-10-01 23:18:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:18:03,256 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2019-10-01 23:18:03,256 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-01 23:18:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2019-10-01 23:18:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-01 23:18:03,259 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:18:03,259 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:18:03,260 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:18:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:18:03,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2020772030, now seen corresponding path program 24 times [2019-10-01 23:18:03,261 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:18:03,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:18:03,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:18:03,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:18:03,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:18:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:18:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-10-01 23:18:03,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:18:03,868 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:18:03,917 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:19:43,426 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-01 23:19:43,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:19:43,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-01 23:19:43,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:19:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-10-01 23:19:43,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:19:43,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-10-01 23:19:43,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-01 23:19:43,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-01 23:19:43,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 23:19:43,525 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand 28 states. [2019-10-01 23:19:43,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:19:43,799 INFO L93 Difference]: Finished difference Result 266 states and 280 transitions. [2019-10-01 23:19:43,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-01 23:19:43,800 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 141 [2019-10-01 23:19:43,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:19:43,801 INFO L225 Difference]: With dead ends: 266 [2019-10-01 23:19:43,802 INFO L226 Difference]: Without dead ends: 151 [2019-10-01 23:19:43,802 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 23:19:43,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-01 23:19:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-10-01 23:19:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-01 23:19:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2019-10-01 23:19:43,809 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 141 [2019-10-01 23:19:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:19:43,809 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2019-10-01 23:19:43,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-01 23:19:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2019-10-01 23:19:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-01 23:19:43,810 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:19:43,810 INFO L411 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:19:43,811 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:19:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:19:43,811 INFO L82 PathProgramCache]: Analyzing trace with hash -693997164, now seen corresponding path program 25 times [2019-10-01 23:19:43,811 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:19:43,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:19:43,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:19:43,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:19:43,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:19:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:19:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2019-10-01 23:19:44,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:19:44,307 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:19:44,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:19:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:19:44,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-01 23:19:44,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:19:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2019-10-01 23:19:44,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:19:44,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-10-01 23:19:44,450 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-01 23:19:44,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-01 23:19:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 23:19:44,451 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand 29 states. [2019-10-01 23:19:44,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:19:44,729 INFO L93 Difference]: Finished difference Result 275 states and 289 transitions. [2019-10-01 23:19:44,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-01 23:19:44,730 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 146 [2019-10-01 23:19:44,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:19:44,731 INFO L225 Difference]: With dead ends: 275 [2019-10-01 23:19:44,731 INFO L226 Difference]: Without dead ends: 156 [2019-10-01 23:19:44,732 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 23:19:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-10-01 23:19:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2019-10-01 23:19:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-10-01 23:19:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2019-10-01 23:19:44,738 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 146 [2019-10-01 23:19:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:19:44,739 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2019-10-01 23:19:44,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-01 23:19:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2019-10-01 23:19:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-01 23:19:44,740 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:19:44,740 INFO L411 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:19:44,740 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:19:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:19:44,740 INFO L82 PathProgramCache]: Analyzing trace with hash 33477250, now seen corresponding path program 26 times [2019-10-01 23:19:44,741 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:19:44,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:19:44,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:19:44,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:19:44,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:19:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:19:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2019-10-01 23:19:45,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:19:45,576 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:19:45,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:19:45,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:19:45,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:19:45,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-01 23:19:45,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:19:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (27)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:19:45,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:19:45,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-10-01 23:19:45,760 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-01 23:19:45,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-01 23:19:45,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-10-01 23:19:45,761 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 30 states. [2019-10-01 23:19:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:19:46,015 INFO L93 Difference]: Finished difference Result 284 states and 298 transitions. [2019-10-01 23:19:46,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-01 23:19:46,016 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2019-10-01 23:19:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:19:46,017 INFO L225 Difference]: With dead ends: 284 [2019-10-01 23:19:46,017 INFO L226 Difference]: Without dead ends: 161 [2019-10-01 23:19:46,018 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-10-01 23:19:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-10-01 23:19:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2019-10-01 23:19:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-01 23:19:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 166 transitions. [2019-10-01 23:19:46,024 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 166 transitions. Word has length 151 [2019-10-01 23:19:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:19:46,024 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 166 transitions. [2019-10-01 23:19:46,024 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-01 23:19:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 166 transitions. [2019-10-01 23:19:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-01 23:19:46,025 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:19:46,026 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:19:46,026 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:19:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:19:46,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1320792876, now seen corresponding path program 27 times [2019-10-01 23:19:46,026 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:19:46,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:19:46,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:19:46,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:19:46,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:19:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:19:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2019-10-01 23:19:46,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:19:46,571 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:19:46,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:21:22,115 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-01 23:21:22,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:21:22,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-01 23:21:22,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:21:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 27 proven. 378 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2019-10-01 23:21:22,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:21:22,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 32 [2019-10-01 23:21:22,219 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-01 23:21:22,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-01 23:21:22,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 23:21:22,220 INFO L87 Difference]: Start difference. First operand 161 states and 166 transitions. Second operand 32 states. [2019-10-01 23:21:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:21:22,725 INFO L93 Difference]: Finished difference Result 293 states and 307 transitions. [2019-10-01 23:21:22,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-01 23:21:22,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2019-10-01 23:21:22,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:21:22,727 INFO L225 Difference]: With dead ends: 293 [2019-10-01 23:21:22,727 INFO L226 Difference]: Without dead ends: 166 [2019-10-01 23:21:22,728 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 23:21:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-10-01 23:21:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2019-10-01 23:21:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-10-01 23:21:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 171 transitions. [2019-10-01 23:21:22,740 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 171 transitions. Word has length 156 [2019-10-01 23:21:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:21:22,741 INFO L475 AbstractCegarLoop]: Abstraction has 166 states and 171 transitions. [2019-10-01 23:21:22,741 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-01 23:21:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 171 transitions. [2019-10-01 23:21:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-01 23:21:22,743 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:21:22,743 INFO L411 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:21:22,743 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:21:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:21:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash 25198018, now seen corresponding path program 28 times [2019-10-01 23:21:22,744 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:21:22,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:21:22,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:21:22,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:21:22,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:21:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:21:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2019-10-01 23:21:23,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:21:23,519 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:21:23,619 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:21:23,753 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:21:23,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:21:23,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-01 23:21:23,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:21:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2019-10-01 23:21:23,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:21:23,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-10-01 23:21:23,821 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-01 23:21:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-01 23:21:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 23:21:23,822 INFO L87 Difference]: Start difference. First operand 166 states and 171 transitions. Second operand 32 states. [2019-10-01 23:21:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:21:24,169 INFO L93 Difference]: Finished difference Result 302 states and 316 transitions. [2019-10-01 23:21:24,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-01 23:21:24,170 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2019-10-01 23:21:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:21:24,172 INFO L225 Difference]: With dead ends: 302 [2019-10-01 23:21:24,172 INFO L226 Difference]: Without dead ends: 171 [2019-10-01 23:21:24,174 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 23:21:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-10-01 23:21:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2019-10-01 23:21:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-10-01 23:21:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 176 transitions. [2019-10-01 23:21:24,184 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 176 transitions. Word has length 161 [2019-10-01 23:21:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:21:24,185 INFO L475 AbstractCegarLoop]: Abstraction has 171 states and 176 transitions. [2019-10-01 23:21:24,185 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-01 23:21:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 176 transitions. [2019-10-01 23:21:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-01 23:21:24,187 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:21:24,187 INFO L411 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:21:24,188 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:21:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:21:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash 160372756, now seen corresponding path program 29 times [2019-10-01 23:21:24,189 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:21:24,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:21:24,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:21:24,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:21:24,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:21:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:21:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2019-10-01 23:21:24,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:21:24,679 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:21:24,713 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:23:50,834 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-01 23:23:50,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:23:50,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-01 23:23:50,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:23:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2019-10-01 23:23:51,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:23:51,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-10-01 23:23:51,009 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-01 23:23:51,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-01 23:23:51,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 23:23:51,010 INFO L87 Difference]: Start difference. First operand 171 states and 176 transitions. Second operand 33 states. [2019-10-01 23:23:51,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:23:51,337 INFO L93 Difference]: Finished difference Result 311 states and 325 transitions. [2019-10-01 23:23:51,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-01 23:23:51,338 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 166 [2019-10-01 23:23:51,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:23:51,339 INFO L225 Difference]: With dead ends: 311 [2019-10-01 23:23:51,340 INFO L226 Difference]: Without dead ends: 176 [2019-10-01 23:23:51,341 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 23:23:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-10-01 23:23:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2019-10-01 23:23:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-10-01 23:23:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 181 transitions. [2019-10-01 23:23:51,349 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 181 transitions. Word has length 166 [2019-10-01 23:23:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:23:51,350 INFO L475 AbstractCegarLoop]: Abstraction has 176 states and 181 transitions. [2019-10-01 23:23:51,350 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-01 23:23:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 181 transitions. [2019-10-01 23:23:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-01 23:23:51,351 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:23:51,352 INFO L411 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:23:51,352 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:23:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:23:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1395492606, now seen corresponding path program 30 times [2019-10-01 23:23:51,353 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:23:51,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:23:51,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:23:51,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:23:51,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:23:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:23:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2019-10-01 23:23:52,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:23:52,121 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:23:52,167 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:26:04,255 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-01 23:26:04,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:26:04,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-01 23:26:04,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:26:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2019-10-01 23:26:04,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:26:04,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-10-01 23:26:04,395 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-01 23:26:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-01 23:26:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-10-01 23:26:04,396 INFO L87 Difference]: Start difference. First operand 176 states and 181 transitions. Second operand 34 states. [2019-10-01 23:26:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:26:04,667 INFO L93 Difference]: Finished difference Result 320 states and 334 transitions. [2019-10-01 23:26:04,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-01 23:26:04,667 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 171 [2019-10-01 23:26:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:26:04,669 INFO L225 Difference]: With dead ends: 320 [2019-10-01 23:26:04,669 INFO L226 Difference]: Without dead ends: 181 [2019-10-01 23:26:04,670 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-10-01 23:26:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-01 23:26:04,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2019-10-01 23:26:04,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-10-01 23:26:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 186 transitions. [2019-10-01 23:26:04,677 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 186 transitions. Word has length 171 [2019-10-01 23:26:04,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:26:04,677 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 186 transitions. [2019-10-01 23:26:04,678 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-01 23:26:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 186 transitions. [2019-10-01 23:26:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-01 23:26:04,679 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:26:04,679 INFO L411 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:26:04,679 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:26:04,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:26:04,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1340288172, now seen corresponding path program 31 times [2019-10-01 23:26:04,680 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:26:04,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:26:04,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:26:04,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:26:04,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:26:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:26:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2019-10-01 23:26:05,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:26:05,370 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 -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:26:05,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:26:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:26:05,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-01 23:26:05,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:26:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2019-10-01 23:26:05,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:26:05,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-10-01 23:26:05,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-01 23:26:05,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-01 23:26:05,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-10-01 23:26:05,565 INFO L87 Difference]: Start difference. First operand 181 states and 186 transitions. Second operand 35 states. [2019-10-01 23:26:05,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:26:05,875 INFO L93 Difference]: Finished difference Result 329 states and 343 transitions. [2019-10-01 23:26:05,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-01 23:26:05,876 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 176 [2019-10-01 23:26:05,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:26:05,877 INFO L225 Difference]: With dead ends: 329 [2019-10-01 23:26:05,877 INFO L226 Difference]: Without dead ends: 186 [2019-10-01 23:26:05,878 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-10-01 23:26:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-10-01 23:26:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2019-10-01 23:26:05,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-10-01 23:26:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2019-10-01 23:26:05,885 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 176 [2019-10-01 23:26:05,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:26:05,885 INFO L475 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2019-10-01 23:26:05,885 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-01 23:26:05,885 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2019-10-01 23:26:05,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-01 23:26:05,886 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:26:05,886 INFO L411 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:26:05,887 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:26:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:26:05,887 INFO L82 PathProgramCache]: Analyzing trace with hash -508246974, now seen corresponding path program 32 times [2019-10-01 23:26:05,887 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:26:05,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:26:05,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:26:05,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:26:05,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:26:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat