/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_strcmp_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:34:57,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:34:57,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:34:57,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:34:57,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:34:57,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:34:57,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:34:57,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:34:57,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:34:57,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:34:57,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:34:57,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:34:57,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:34:57,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:34:57,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:34:57,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:34:57,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:34:57,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:34:57,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:34:57,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:34:57,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:34:57,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:34:57,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:34:57,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:34:57,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:34:57,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:34:57,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:34:57,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:34:57,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:34:57,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:34:57,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:34:57,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:34:57,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:34:57,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:34:57,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:34:57,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:34:57,771 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 [2019-11-23 20:34:57,786 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:34:57,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:34:57,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:34:57,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:34:57,791 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:34:57,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:34:57,792 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:34:57,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:34:57,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:34:57,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:34:57,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:34:57,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:34:57,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:34:57,793 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:34:57,793 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:34:57,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:34:57,793 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:34:57,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:34:57,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:34:57,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:34:57,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:34:57,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:34:57,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:34:57,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:34:57,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:34:57,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:34:57,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:34:57,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:34:57,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:34:57,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:34:58,075 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:34:58,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:34:58,091 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:34:58,093 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:34:58,093 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:34:58,094 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2019-11-23 20:34:58,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29df806b8/ff16cc03ff08439591b7095c176f18c7/FLAGc5e581fbc [2019-11-23 20:34:58,546 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:34:58,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2019-11-23 20:34:58,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29df806b8/ff16cc03ff08439591b7095c176f18c7/FLAGc5e581fbc [2019-11-23 20:34:58,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29df806b8/ff16cc03ff08439591b7095c176f18c7 [2019-11-23 20:34:58,972 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:34:58,974 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:34:58,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:34:58,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:34:58,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:34:58,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:58" (1/1) ... [2019-11-23 20:34:58,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a32c64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:58, skipping insertion in model container [2019-11-23 20:34:58,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:58" (1/1) ... [2019-11-23 20:34:58,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:34:59,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:34:59,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:34:59,258 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:34:59,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:34:59,301 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:34:59,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59 WrapperNode [2019-11-23 20:34:59,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:34:59,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:34:59,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:34:59,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:34:59,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:34:59,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:34:59,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:34:59,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:34:59,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:34:59,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:34:59,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:34:59,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:34:59,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (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 [2019-11-23 20:34:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:34:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:34:59,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:34:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:34:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:34:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:34:59,758 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:34:59,758 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:34:59,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:59 BoogieIcfgContainer [2019-11-23 20:34:59,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:34:59,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:34:59,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:34:59,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:34:59,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:34:58" (1/3) ... [2019-11-23 20:34:59,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c4ebae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:59, skipping insertion in model container [2019-11-23 20:34:59,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (2/3) ... [2019-11-23 20:34:59,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c4ebae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:59, skipping insertion in model container [2019-11-23 20:34:59,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:59" (3/3) ... [2019-11-23 20:34:59,788 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2019-11-23 20:34:59,808 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:34:59,818 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:34:59,835 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:34:59,864 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:34:59,864 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:34:59,864 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:34:59,864 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:34:59,865 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:34:59,865 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:34:59,865 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:34:59,865 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:34:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 20:34:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:34:59,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:59,885 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:59,885 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:59,890 INFO L82 PathProgramCache]: Analyzing trace with hash -380323295, now seen corresponding path program 1 times [2019-11-23 20:34:59,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:59,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939800035] [2019-11-23 20:34:59,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:00,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939800035] [2019-11-23 20:35:00,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:00,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:35:00,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684842497] [2019-11-23 20:35:00,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:35:00,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:35:00,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:35:00,035 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-23 20:35:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:00,049 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2019-11-23 20:35:00,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:35:00,050 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 20:35:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:00,058 INFO L225 Difference]: With dead ends: 36 [2019-11-23 20:35:00,058 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:35:00,061 INFO L630 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 [2019-11-23 20:35:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:35:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 20:35:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:35:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-23 20:35:00,093 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2019-11-23 20:35:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:00,093 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-23 20:35:00,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:35:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-23 20:35:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:35:00,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:00,094 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:00,095 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:00,095 INFO L82 PathProgramCache]: Analyzing trace with hash 222078168, now seen corresponding path program 1 times [2019-11-23 20:35:00,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:00,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739990878] [2019-11-23 20:35:00,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:00,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739990878] [2019-11-23 20:35:00,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:00,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:00,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329407927] [2019-11-23 20:35:00,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:00,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:00,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:00,151 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2019-11-23 20:35:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:00,188 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2019-11-23 20:35:00,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:00,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:35:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:00,190 INFO L225 Difference]: With dead ends: 30 [2019-11-23 20:35:00,190 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:35:00,191 INFO L630 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 [2019-11-23 20:35:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:35:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 20:35:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:35:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:35:00,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2019-11-23 20:35:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:00,197 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:35:00,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:35:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:35:00,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:00,198 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:00,199 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:00,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1385790102, now seen corresponding path program 1 times [2019-11-23 20:35:00,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:00,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067287747] [2019-11-23 20:35:00,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:00,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067287747] [2019-11-23 20:35:00,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:00,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:00,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067974472] [2019-11-23 20:35:00,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:00,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:00,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:00,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:00,256 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2019-11-23 20:35:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:00,280 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2019-11-23 20:35:00,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:00,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-23 20:35:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:00,282 INFO L225 Difference]: With dead ends: 36 [2019-11-23 20:35:00,282 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:35:00,283 INFO L630 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 [2019-11-23 20:35:00,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:35:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2019-11-23 20:35:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:35:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-23 20:35:00,288 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2019-11-23 20:35:00,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:00,288 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-23 20:35:00,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-23 20:35:00,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:35:00,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:00,290 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:00,290 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:00,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:00,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1305944738, now seen corresponding path program 1 times [2019-11-23 20:35:00,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:00,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685072233] [2019-11-23 20:35:00,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:00,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685072233] [2019-11-23 20:35:00,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:00,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:35:00,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735577304] [2019-11-23 20:35:00,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:35:00,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:00,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:35:00,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:35:00,372 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2019-11-23 20:35:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:00,421 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-11-23 20:35:00,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:35:00,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 20:35:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:00,424 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:35:00,424 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:35:00,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:35:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:35:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 20:35:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:35:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-23 20:35:00,429 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-11-23 20:35:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:00,430 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-23 20:35:00,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:35:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-23 20:35:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:35:00,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:00,431 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:00,431 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash -498070767, now seen corresponding path program 1 times [2019-11-23 20:35:00,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:00,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188475504] [2019-11-23 20:35:00,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:00,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188475504] [2019-11-23 20:35:00,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606015559] [2019-11-23 20:35:00,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:00,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:35:00,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:00,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:00,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:35:00,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324934013] [2019-11-23 20:35:00,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:35:00,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:00,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:35:00,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:35:00,624 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2019-11-23 20:35:00,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:00,647 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-23 20:35:00,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:35:00,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-23 20:35:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:00,649 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:35:00,649 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:35:00,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:35:00,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:35:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-23 20:35:00,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:35:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:35:00,654 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-11-23 20:35:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:00,655 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:35:00,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:35:00,655 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:35:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:35:00,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:00,656 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:00,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:00,861 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:00,862 INFO L82 PathProgramCache]: Analyzing trace with hash -575680049, now seen corresponding path program 2 times [2019-11-23 20:35:00,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:00,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728406988] [2019-11-23 20:35:00,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:00,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728406988] [2019-11-23 20:35:00,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745645916] [2019-11-23 20:35:00,926 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:00,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:00,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:00,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:35:00,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:01,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:01,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:35:01,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141919921] [2019-11-23 20:35:01,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:35:01,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:01,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:35:01,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:01,007 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2019-11-23 20:35:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:01,047 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-11-23 20:35:01,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:35:01,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-23 20:35:01,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:01,050 INFO L225 Difference]: With dead ends: 36 [2019-11-23 20:35:01,050 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:35:01,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:35:01,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-23 20:35:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:35:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-23 20:35:01,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2019-11-23 20:35:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:01,062 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-23 20:35:01,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:35:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-23 20:35:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:35:01,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:01,063 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:01,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:01,286 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:01,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2143756019, now seen corresponding path program 3 times [2019-11-23 20:35:01,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:01,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396301363] [2019-11-23 20:35:01,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:01,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396301363] [2019-11-23 20:35:01,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307992915] [2019-11-23 20:35:01,387 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:01,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:35:01,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:01,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:35:01,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:35:01,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:01,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:35:01,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533933581] [2019-11-23 20:35:01,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:35:01,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:01,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:35:01,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:35:01,465 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2019-11-23 20:35:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:01,536 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-11-23 20:35:01,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:35:01,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-23 20:35:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:01,540 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:35:01,541 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:35:01,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:35:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:35:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-23 20:35:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:35:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-23 20:35:01,548 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2019-11-23 20:35:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:01,549 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-23 20:35:01,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:35:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-23 20:35:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:35:01,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:01,552 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:01,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:01,753 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:01,753 INFO L82 PathProgramCache]: Analyzing trace with hash 847441926, now seen corresponding path program 4 times [2019-11-23 20:35:01,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:01,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744458359] [2019-11-23 20:35:01,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:35:01,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744458359] [2019-11-23 20:35:01,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542612090] [2019-11-23 20:35:01,861 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:01,915 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:01,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:01,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:35:01,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:35:01,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:01,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:35:01,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712843697] [2019-11-23 20:35:01,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:35:01,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:01,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:35:01,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:35:01,940 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2019-11-23 20:35:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:01,973 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2019-11-23 20:35:01,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:35:01,975 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-23 20:35:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:01,976 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:35:01,976 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:35:01,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:35:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:35:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:35:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:35:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 20:35:01,981 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-11-23 20:35:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:01,981 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 20:35:01,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:35:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 20:35:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:35:01,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:01,982 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:02,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:02,191 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:02,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1468471492, now seen corresponding path program 5 times [2019-11-23 20:35:02,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:02,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740078770] [2019-11-23 20:35:02,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:35:02,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740078770] [2019-11-23 20:35:02,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200643046] [2019-11-23 20:35:02,330 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:02,436 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:35:02,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:02,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:35:02,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:35:02,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:02,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:35:02,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685355300] [2019-11-23 20:35:02,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:35:02,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:02,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:35:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:35:02,474 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2019-11-23 20:35:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:02,527 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2019-11-23 20:35:02,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:35:02,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-23 20:35:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:02,528 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:35:02,528 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:35:02,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:35:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:35:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-11-23 20:35:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:35:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-23 20:35:02,533 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2019-11-23 20:35:02,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:02,534 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-23 20:35:02,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:35:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-23 20:35:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:35:02,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:02,535 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:02,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:02,740 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:02,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1552650371, now seen corresponding path program 6 times [2019-11-23 20:35:02,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:02,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627634109] [2019-11-23 20:35:02,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:35:02,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627634109] [2019-11-23 20:35:02,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111408761] [2019-11-23 20:35:02,865 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:02,921 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:35:02,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:02,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:35:02,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:03,032 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:03,032 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 67 [2019-11-23 20:35:03,033 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:03,067 INFO L567 ElimStorePlain]: treesize reduction 40, result has 45.2 percent of original size [2019-11-23 20:35:03,068 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:03,070 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:7 [2019-11-23 20:35:03,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:35:03,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:03,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-23 20:35:03,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067242730] [2019-11-23 20:35:03,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:35:03,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:03,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:35:03,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:35:03,208 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2019-11-23 20:35:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:03,495 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2019-11-23 20:35:03,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:35:03,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2019-11-23 20:35:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:03,498 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:35:03,498 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:35:03,499 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:35:03,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:35:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-11-23 20:35:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:35:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-23 20:35:03,509 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2019-11-23 20:35:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:03,509 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-23 20:35:03,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:35:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-23 20:35:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:35:03,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:03,511 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:03,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:03,720 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash -484477583, now seen corresponding path program 1 times [2019-11-23 20:35:03,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:03,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767506272] [2019-11-23 20:35:03,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:35:03,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767506272] [2019-11-23 20:35:03,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56201425] [2019-11-23 20:35:03,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:03,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:35:03,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:35:03,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:03,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:35:03,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715729278] [2019-11-23 20:35:03,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:35:03,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:03,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:35:03,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:35:03,918 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 11 states. [2019-11-23 20:35:03,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:03,972 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2019-11-23 20:35:03,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:35:03,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-11-23 20:35:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:03,974 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:35:03,974 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:35:03,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:35:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:35:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-23 20:35:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:35:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-11-23 20:35:03,980 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2019-11-23 20:35:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:03,980 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-11-23 20:35:03,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:35:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-11-23 20:35:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:35:03,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:03,982 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:04,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:04,185 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:04,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:04,186 INFO L82 PathProgramCache]: Analyzing trace with hash 543584559, now seen corresponding path program 2 times [2019-11-23 20:35:04,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:04,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949257835] [2019-11-23 20:35:04,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:35:04,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949257835] [2019-11-23 20:35:04,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203954422] [2019-11-23 20:35:04,305 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:04,366 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:04,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:04,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:35:04,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:35:04,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:04,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:35:04,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76156979] [2019-11-23 20:35:04,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:35:04,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:35:04,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:35:04,399 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 12 states. [2019-11-23 20:35:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:04,442 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2019-11-23 20:35:04,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:35:04,450 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-11-23 20:35:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:04,451 INFO L225 Difference]: With dead ends: 60 [2019-11-23 20:35:04,451 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:35:04,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:35:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:35:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 20:35:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:35:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-11-23 20:35:04,457 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2019-11-23 20:35:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:04,457 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-11-23 20:35:04,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:35:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-11-23 20:35:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:35:04,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:04,459 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:04,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:04,663 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:04,663 INFO L82 PathProgramCache]: Analyzing trace with hash 668824941, now seen corresponding path program 3 times [2019-11-23 20:35:04,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:04,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992052930] [2019-11-23 20:35:04,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:35:04,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992052930] [2019-11-23 20:35:04,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267387742] [2019-11-23 20:35:04,782 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:04,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:35:04,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:04,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:04,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-23 20:35:04,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:04,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:35:04,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507867104] [2019-11-23 20:35:04,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:35:04,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:04,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:35:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:04,899 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2019-11-23 20:35:04,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:04,987 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2019-11-23 20:35:04,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:35:04,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2019-11-23 20:35:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:04,989 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:35:04,989 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:35:04,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:04,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:35:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-11-23 20:35:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:35:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-11-23 20:35:04,995 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2019-11-23 20:35:04,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:04,995 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-11-23 20:35:04,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:35:04,996 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-11-23 20:35:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:35:04,997 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:04,997 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:05,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:05,207 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash -888970906, now seen corresponding path program 4 times [2019-11-23 20:35:05,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:05,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672640817] [2019-11-23 20:35:05,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:35:05,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672640817] [2019-11-23 20:35:05,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758981657] [2019-11-23 20:35:05,317 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:05,376 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:05,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:05,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:35:05,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:35:05,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:05,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:35:05,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389808429] [2019-11-23 20:35:05,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:35:05,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:05,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:35:05,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:35:05,403 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 14 states. [2019-11-23 20:35:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:05,446 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2019-11-23 20:35:05,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:35:05,446 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2019-11-23 20:35:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:05,447 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:35:05,447 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:35:05,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:35:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:35:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-23 20:35:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:35:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-23 20:35:05,453 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2019-11-23 20:35:05,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:05,453 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-23 20:35:05,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:35:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-23 20:35:05,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:35:05,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:05,454 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:05,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:05,658 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:05,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2048278748, now seen corresponding path program 5 times [2019-11-23 20:35:05,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:05,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061764440] [2019-11-23 20:35:05,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:35:05,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061764440] [2019-11-23 20:35:05,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034176578] [2019-11-23 20:35:05,823 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:06,354 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:35:06,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:06,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:35:06,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-23 20:35:06,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:06,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:35:06,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163794107] [2019-11-23 20:35:06,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:35:06,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:35:06,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:35:06,435 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2019-11-23 20:35:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:06,517 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2019-11-23 20:35:06,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:35:06,518 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2019-11-23 20:35:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:06,518 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:35:06,518 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:35:06,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:35:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:35:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-11-23 20:35:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:35:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-11-23 20:35:06,524 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2019-11-23 20:35:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:06,525 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-11-23 20:35:06,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:35:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-11-23 20:35:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:35:06,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:06,526 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:06,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:06,731 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:06,732 INFO L82 PathProgramCache]: Analyzing trace with hash 675984093, now seen corresponding path program 6 times [2019-11-23 20:35:06,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:06,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457767774] [2019-11-23 20:35:06,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:35:06,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457767774] [2019-11-23 20:35:06,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241136059] [2019-11-23 20:35:06,857 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:07,017 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:35:07,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:07,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 54 conjunts are in the unsatisfiable core [2019-11-23 20:35:07,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:07,036 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:07,036 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:07,042 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:07,042 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:07,042 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:35:07,069 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2019-11-23 20:35:07,069 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:07,077 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:07,078 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:07,078 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:11 [2019-11-23 20:35:07,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:35:07,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:07,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2019-11-23 20:35:07,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37570009] [2019-11-23 20:35:07,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:35:07,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:07,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:35:07,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:07,310 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 24 states. [2019-11-23 20:35:07,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:07,983 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2019-11-23 20:35:07,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:35:07,991 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2019-11-23 20:35:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:07,991 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:35:07,992 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:35:07,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:35:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:35:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2019-11-23 20:35:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:35:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-23 20:35:08,000 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2019-11-23 20:35:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:08,000 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-23 20:35:08,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:35:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-23 20:35:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:35:08,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:08,001 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:08,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:08,205 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:08,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1053359569, now seen corresponding path program 7 times [2019-11-23 20:35:08,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:08,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947224744] [2019-11-23 20:35:08,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:35:08,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947224744] [2019-11-23 20:35:08,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053112028] [2019-11-23 20:35:08,354 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:08,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:35:08,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:35:08,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:08,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:35:08,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866410479] [2019-11-23 20:35:08,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:35:08,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:08,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:35:08,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:35:08,438 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 17 states. [2019-11-23 20:35:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:08,506 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2019-11-23 20:35:08,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:35:08,507 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2019-11-23 20:35:08,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:08,507 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:35:08,507 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:35:08,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:35:08,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:35:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-11-23 20:35:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:35:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-11-23 20:35:08,526 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2019-11-23 20:35:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:08,526 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-11-23 20:35:08,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:35:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-11-23 20:35:08,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:35:08,528 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:08,530 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:08,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:08,731 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:08,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:08,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1867165327, now seen corresponding path program 8 times [2019-11-23 20:35:08,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:08,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815125132] [2019-11-23 20:35:08,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:35:08,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815125132] [2019-11-23 20:35:08,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719014817] [2019-11-23 20:35:08,942 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:09,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:09,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:09,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:35:09,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:35:09,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:09,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:35:09,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140983541] [2019-11-23 20:35:09,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:35:09,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:09,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:35:09,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:35:09,021 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 18 states. [2019-11-23 20:35:09,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:09,072 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2019-11-23 20:35:09,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:35:09,072 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2019-11-23 20:35:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:09,073 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:35:09,074 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:35:09,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:35:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:35:09,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-23 20:35:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:35:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-23 20:35:09,078 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2019-11-23 20:35:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:09,079 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-23 20:35:09,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:35:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-23 20:35:09,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:35:09,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:09,080 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:09,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:09,290 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:09,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:09,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2044516403, now seen corresponding path program 9 times [2019-11-23 20:35:09,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:09,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857363194] [2019-11-23 20:35:09,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:35:09,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857363194] [2019-11-23 20:35:09,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557305132] [2019-11-23 20:35:09,493 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:09,564 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:35:09,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:09,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:35:09,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2019-11-23 20:35:09,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:09,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:35:09,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029269719] [2019-11-23 20:35:09,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:35:09,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:35:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:09,640 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2019-11-23 20:35:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:09,741 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2019-11-23 20:35:09,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:35:09,741 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2019-11-23 20:35:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:09,742 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:35:09,742 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:35:09,743 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:35:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-11-23 20:35:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:35:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2019-11-23 20:35:09,754 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2019-11-23 20:35:09,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:09,754 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2019-11-23 20:35:09,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:35:09,754 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2019-11-23 20:35:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:35:09,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:09,755 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:09,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:09,956 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:09,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:09,957 INFO L82 PathProgramCache]: Analyzing trace with hash 956887238, now seen corresponding path program 10 times [2019-11-23 20:35:09,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:09,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989762741] [2019-11-23 20:35:09,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-23 20:35:10,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989762741] [2019-11-23 20:35:10,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369883267] [2019-11-23 20:35:10,161 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:10,238 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:10,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:10,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:35:10,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-23 20:35:10,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:10,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:35:10,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606491868] [2019-11-23 20:35:10,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:35:10,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:10,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:35:10,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:35:10,274 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 20 states. [2019-11-23 20:35:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:10,345 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2019-11-23 20:35:10,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:35:10,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2019-11-23 20:35:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:10,346 INFO L225 Difference]: With dead ends: 96 [2019-11-23 20:35:10,346 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:35:10,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:35:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:35:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:35:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:35:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-11-23 20:35:10,352 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2019-11-23 20:35:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:10,353 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-11-23 20:35:10,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:35:10,353 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-11-23 20:35:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:35:10,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:10,354 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:10,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:10,558 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1873085316, now seen corresponding path program 11 times [2019-11-23 20:35:10,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:10,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662036846] [2019-11-23 20:35:10,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-23 20:35:10,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662036846] [2019-11-23 20:35:10,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428317398] [2019-11-23 20:35:10,784 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:13,040 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:35:13,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:13,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:13,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2019-11-23 20:35:13,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:13,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:35:13,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999223487] [2019-11-23 20:35:13,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:35:13,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:35:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:35:13,172 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 27 states. [2019-11-23 20:35:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:13,288 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2019-11-23 20:35:13,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:35:13,288 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2019-11-23 20:35:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:13,289 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:35:13,290 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:35:13,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:35:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:35:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:35:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:35:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-11-23 20:35:13,295 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2019-11-23 20:35:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:13,295 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-11-23 20:35:13,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:35:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-11-23 20:35:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:35:13,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:13,296 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:13,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:13,501 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1025665987, now seen corresponding path program 12 times [2019-11-23 20:35:13,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:13,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580059476] [2019-11-23 20:35:13,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:35:13,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580059476] [2019-11-23 20:35:13,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414658890] [2019-11-23 20:35:13,729 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,407 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:35:14,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:14,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2019-11-23 20:35:14,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:14,418 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:14,418 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:14,423 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:14,424 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:14,424 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:35:14,459 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2019-11-23 20:35:14,460 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:14,470 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:14,471 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:14,471 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:11 [2019-11-23 20:35:14,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2019-11-23 20:35:14,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:14,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2019-11-23 20:35:14,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726140575] [2019-11-23 20:35:14,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:35:14,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:14,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:35:14,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:35:14,794 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 32 states. [2019-11-23 20:35:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:15,635 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2019-11-23 20:35:15,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:35:15,637 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2019-11-23 20:35:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:15,637 INFO L225 Difference]: With dead ends: 111 [2019-11-23 20:35:15,637 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:35:15,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=696, Invalid=2384, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:35:15,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:35:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2019-11-23 20:35:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:35:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2019-11-23 20:35:15,644 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2019-11-23 20:35:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:15,644 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2019-11-23 20:35:15,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:35:15,645 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2019-11-23 20:35:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:35:15,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:15,645 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:15,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,854 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:15,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2015601713, now seen corresponding path program 13 times [2019-11-23 20:35:15,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:15,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748100174] [2019-11-23 20:35:15,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-23 20:35:16,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748100174] [2019-11-23 20:35:16,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731016909] [2019-11-23 20:35:16,187 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:16,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:35:16,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-23 20:35:16,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:16,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:35:16,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813161106] [2019-11-23 20:35:16,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:35:16,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:16,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:35:16,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:35:16,330 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 23 states. [2019-11-23 20:35:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:16,416 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2019-11-23 20:35:16,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:35:16,417 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 75 [2019-11-23 20:35:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:16,417 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:35:16,418 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 20:35:16,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:35:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 20:35:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-11-23 20:35:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:35:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-11-23 20:35:16,423 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2019-11-23 20:35:16,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:16,423 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-11-23 20:35:16,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:35:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-11-23 20:35:16,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:35:16,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:16,424 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:16,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,634 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash -529298961, now seen corresponding path program 14 times [2019-11-23 20:35:16,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:16,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685467657] [2019-11-23 20:35:16,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-23 20:35:16,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685467657] [2019-11-23 20:35:16,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356539345] [2019-11-23 20:35:16,910 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:16,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:16,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:16,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:35:16,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-23 20:35:17,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:17,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:35:17,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621331477] [2019-11-23 20:35:17,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:35:17,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:17,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:35:17,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:17,023 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 24 states. [2019-11-23 20:35:17,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:17,106 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2019-11-23 20:35:17,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:35:17,108 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2019-11-23 20:35:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:17,108 INFO L225 Difference]: With dead ends: 116 [2019-11-23 20:35:17,108 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:35:17,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:35:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-11-23 20:35:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:35:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2019-11-23 20:35:17,114 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2019-11-23 20:35:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:17,114 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2019-11-23 20:35:17,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:35:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2019-11-23 20:35:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:35:17,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:17,115 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:17,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:17,319 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:17,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1952512045, now seen corresponding path program 15 times [2019-11-23 20:35:17,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:17,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089834520] [2019-11-23 20:35:17,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-23 20:35:17,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089834520] [2019-11-23 20:35:17,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926397049] [2019-11-23 20:35:17,587 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:17,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:35:17,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:17,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:35:17,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-11-23 20:35:17,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:17,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-11-23 20:35:17,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284957051] [2019-11-23 20:35:17,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:35:17,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:17,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:35:17,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:35:17,802 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2019-11-23 20:35:17,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:17,912 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2019-11-23 20:35:17,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:35:17,913 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 79 [2019-11-23 20:35:17,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:17,913 INFO L225 Difference]: With dead ends: 121 [2019-11-23 20:35:17,913 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:35:17,914 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:35:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:35:17,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:35:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:35:17,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2019-11-23 20:35:17,919 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2019-11-23 20:35:17,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:17,919 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2019-11-23 20:35:17,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:35:17,920 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2019-11-23 20:35:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:35:17,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:17,921 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:18,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,125 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:18,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2137693734, now seen corresponding path program 16 times [2019-11-23 20:35:18,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:18,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581663167] [2019-11-23 20:35:18,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-23 20:35:18,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581663167] [2019-11-23 20:35:18,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502624456] [2019-11-23 20:35:18,433 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,510 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:18,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:18,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:35:18,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-23 20:35:18,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:18,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:35:18,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820557077] [2019-11-23 20:35:18,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:35:18,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:18,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:35:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:35:18,536 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 26 states. [2019-11-23 20:35:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:18,636 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2019-11-23 20:35:18,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:35:18,636 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 83 [2019-11-23 20:35:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:18,637 INFO L225 Difference]: With dead ends: 124 [2019-11-23 20:35:18,637 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:35:18,638 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:35:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:35:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:35:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:35:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-11-23 20:35:18,643 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2019-11-23 20:35:18,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:18,644 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-11-23 20:35:18,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:35:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-11-23 20:35:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:35:18,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:18,645 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:18,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,848 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1792009700, now seen corresponding path program 17 times [2019-11-23 20:35:18,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:18,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574173935] [2019-11-23 20:35:18,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-23 20:35:19,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574173935] [2019-11-23 20:35:19,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271066714] [2019-11-23 20:35:19,158 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:54,288 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:35:54,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:54,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:35:54,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-23 20:35:54,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:54,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2019-11-23 20:35:54,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057904470] [2019-11-23 20:35:54,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:35:54,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:54,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:35:54,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:35:54,465 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 35 states. [2019-11-23 20:35:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:54,652 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2019-11-23 20:35:54,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:35:54,653 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 85 [2019-11-23 20:35:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:54,654 INFO L225 Difference]: With dead ends: 129 [2019-11-23 20:35:54,654 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:35:54,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:35:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:35:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2019-11-23 20:35:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-23 20:35:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2019-11-23 20:35:54,660 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2019-11-23 20:35:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:54,660 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2019-11-23 20:35:54,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:35:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2019-11-23 20:35:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:35:54,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:54,661 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:54,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:54,875 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:54,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1388581789, now seen corresponding path program 18 times [2019-11-23 20:35:54,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:54,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947229185] [2019-11-23 20:35:54,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-23 20:35:55,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947229185] [2019-11-23 20:35:55,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879122174] [2019-11-23 20:35:55,216 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:02,760 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 20:36:02,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:02,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 60 conjunts are in the unsatisfiable core [2019-11-23 20:36:02,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:02,789 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:36:02,789 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:02,794 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:02,795 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:36:02,795 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:36:02,828 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2019-11-23 20:36:02,828 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:02,835 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:02,836 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:36:02,836 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:11 [2019-11-23 20:36:03,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:36:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2019-11-23 20:36:03,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:03,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2019-11-23 20:36:03,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394828118] [2019-11-23 20:36:03,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:36:03,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:36:03,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:36:03,368 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 40 states. [2019-11-23 20:36:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:04,683 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2019-11-23 20:36:04,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:36:04,683 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2019-11-23 20:36:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:04,685 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:36:04,685 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:36:04,687 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1126, Invalid=3704, Unknown=0, NotChecked=0, Total=4830 [2019-11-23 20:36:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:36:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2019-11-23 20:36:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:36:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2019-11-23 20:36:04,692 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2019-11-23 20:36:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:04,692 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2019-11-23 20:36:04,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:36:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2019-11-23 20:36:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:36:04,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:04,694 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 9, 9, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:04,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:04,894 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash 243689617, now seen corresponding path program 19 times [2019-11-23 20:36:04,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:04,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434962729] [2019-11-23 20:36:04,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:36:05,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434962729] [2019-11-23 20:36:05,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428686605] [2019-11-23 20:36:05,289 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:05,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:36:05,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:36:05,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:05,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:36:05,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183855299] [2019-11-23 20:36:05,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:36:05,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:05,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:36:05,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:36:05,424 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 29 states. [2019-11-23 20:36:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:05,513 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2019-11-23 20:36:05,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:36:05,514 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2019-11-23 20:36:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:05,515 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:36:05,515 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:36:05,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:36:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:36:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-11-23 20:36:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:36:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2019-11-23 20:36:05,521 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2019-11-23 20:36:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:05,521 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2019-11-23 20:36:05,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:36:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2019-11-23 20:36:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:36:05,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:05,521 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 9, 9, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:05,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:05,722 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:05,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1719141199, now seen corresponding path program 20 times [2019-11-23 20:36:05,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:05,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693260266] [2019-11-23 20:36:05,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:36:06,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693260266] [2019-11-23 20:36:06,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131923973] [2019-11-23 20:36:06,245 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:06,338 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:06,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:06,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:36:06,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:36:06,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:06,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:36:06,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469093725] [2019-11-23 20:36:06,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:36:06,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:06,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:36:06,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:36:06,365 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 30 states. [2019-11-23 20:36:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:06,473 INFO L93 Difference]: Finished difference Result 144 states and 148 transitions. [2019-11-23 20:36:06,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:36:06,473 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 97 [2019-11-23 20:36:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:06,474 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:36:06,474 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 20:36:06,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:36:06,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 20:36:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-11-23 20:36:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:36:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2019-11-23 20:36:06,482 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2019-11-23 20:36:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:06,483 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2019-11-23 20:36:06,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:36:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2019-11-23 20:36:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:36:06,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:06,484 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:06,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:06,687 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:06,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2006063475, now seen corresponding path program 21 times [2019-11-23 20:36:06,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:06,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579015622] [2019-11-23 20:36:06,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:36:07,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579015622] [2019-11-23 20:36:07,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232681727] [2019-11-23 20:36:07,059 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:07,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:36:07,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:07,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:36:07,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2019-11-23 20:36:07,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:07,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 12] total 40 [2019-11-23 20:36:07,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719035603] [2019-11-23 20:36:07,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:36:07,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:07,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:36:07,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:36:07,373 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 40 states. [2019-11-23 20:36:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:07,575 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2019-11-23 20:36:07,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:36:07,576 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 99 [2019-11-23 20:36:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:07,577 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:36:07,577 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 20:36:07,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:36:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 20:36:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2019-11-23 20:36:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:36:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2019-11-23 20:36:07,583 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 99 [2019-11-23 20:36:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:07,583 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2019-11-23 20:36:07,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:36:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2019-11-23 20:36:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 20:36:07,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:07,584 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 10, 10, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:07,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:07,788 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash 494889350, now seen corresponding path program 22 times [2019-11-23 20:36:07,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:07,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267289915] [2019-11-23 20:36:07,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-23 20:36:08,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267289915] [2019-11-23 20:36:08,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662847014] [2019-11-23 20:36:08,217 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:08,299 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:36:08,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:08,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:36:08,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 916 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-23 20:36:08,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:08,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:36:08,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052310634] [2019-11-23 20:36:08,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:36:08,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:08,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:36:08,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:36:08,322 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 32 states. [2019-11-23 20:36:08,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:08,448 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2019-11-23 20:36:08,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:36:08,448 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 103 [2019-11-23 20:36:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:08,449 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:36:08,449 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 20:36:08,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:36:08,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 20:36:08,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-11-23 20:36:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-23 20:36:08,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2019-11-23 20:36:08,455 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2019-11-23 20:36:08,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:08,455 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2019-11-23 20:36:08,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:36:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2019-11-23 20:36:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 20:36:08,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:08,456 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 10, 10, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:08,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:08,660 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:08,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:08,660 INFO L82 PathProgramCache]: Analyzing trace with hash 704734788, now seen corresponding path program 23 times [2019-11-23 20:36:08,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:08,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438493241] [2019-11-23 20:36:08,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-23 20:36:09,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438493241] [2019-11-23 20:36:09,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96723973] [2019-11-23 20:36:09,304 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:17,251 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:36:17,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:17,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:36:17,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2019-11-23 20:36:17,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:17,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 13] total 43 [2019-11-23 20:36:17,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819243803] [2019-11-23 20:36:17,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:36:17,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:17,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:36:17,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=1233, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:36:17,657 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 43 states. [2019-11-23 20:36:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:17,944 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2019-11-23 20:36:17,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:36:17,947 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 105 [2019-11-23 20:36:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:17,948 INFO L225 Difference]: With dead ends: 157 [2019-11-23 20:36:17,948 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:36:17,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=573, Invalid=1233, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:36:17,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:36:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2019-11-23 20:36:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 20:36:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2019-11-23 20:36:17,961 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 105 [2019-11-23 20:36:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:17,962 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2019-11-23 20:36:17,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:36:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2019-11-23 20:36:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 20:36:17,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:17,963 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 11, 11, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:18,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:18,166 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:18,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:18,167 INFO L82 PathProgramCache]: Analyzing trace with hash -736808707, now seen corresponding path program 24 times [2019-11-23 20:36:18,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:18,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295596194] [2019-11-23 20:36:18,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:36:18,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295596194] [2019-11-23 20:36:18,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274975611] [2019-11-23 20:36:18,839 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:39,517 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:36:39,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:39,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 64 conjunts are in the unsatisfiable core [2019-11-23 20:36:39,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:39,541 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:36:39,541 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:39,549 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:39,550 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:36:39,550 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:36:39,591 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2019-11-23 20:36:39,591 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:39,601 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:39,602 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:36:39,602 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:11 [2019-11-23 20:36:40,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:36:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2019-11-23 20:36:40,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:40,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17] total 48 [2019-11-23 20:36:40,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775479168] [2019-11-23 20:36:40,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:36:40,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:36:40,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:36:40,175 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 48 states. [2019-11-23 20:36:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:41,952 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2019-11-23 20:36:41,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:36:41,952 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 109 [2019-11-23 20:36:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:41,953 INFO L225 Difference]: With dead ends: 167 [2019-11-23 20:36:41,953 INFO L226 Difference]: Without dead ends: 120 [2019-11-23 20:36:41,956 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1664, Invalid=5308, Unknown=0, NotChecked=0, Total=6972 [2019-11-23 20:36:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-23 20:36:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2019-11-23 20:36:41,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:36:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2019-11-23 20:36:41,961 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 109 [2019-11-23 20:36:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:41,962 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2019-11-23 20:36:41,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:36:41,962 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2019-11-23 20:36:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:36:41,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:41,963 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 11, 11, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:42,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:42,164 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:42,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1036536561, now seen corresponding path program 25 times [2019-11-23 20:36:42,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:42,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643008725] [2019-11-23 20:36:42,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:36:42,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643008725] [2019-11-23 20:36:42,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345110697] [2019-11-23 20:36:42,635 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:42,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:36:42,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:36:42,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:42,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:36:42,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710459232] [2019-11-23 20:36:42,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:36:42,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:42,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:36:42,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:36:42,760 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 35 states. [2019-11-23 20:36:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:42,914 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2019-11-23 20:36:42,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:36:42,915 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 115 [2019-11-23 20:36:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:42,915 INFO L225 Difference]: With dead ends: 170 [2019-11-23 20:36:42,916 INFO L226 Difference]: Without dead ends: 119 [2019-11-23 20:36:42,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:36:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-23 20:36:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2019-11-23 20:36:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-23 20:36:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2019-11-23 20:36:42,923 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 115 [2019-11-23 20:36:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:42,923 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2019-11-23 20:36:42,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:36:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2019-11-23 20:36:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 20:36:42,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:42,924 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 11, 11, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:43,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:43,125 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:43,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1871766865, now seen corresponding path program 26 times [2019-11-23 20:36:43,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:43,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072442345] [2019-11-23 20:36:43,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:36:43,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072442345] [2019-11-23 20:36:43,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108449011] [2019-11-23 20:36:43,643 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:43,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:43,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:43,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:36:43,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:36:43,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:43,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:36:43,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495824827] [2019-11-23 20:36:43,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:36:43,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:43,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:36:43,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:36:43,794 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 36 states. [2019-11-23 20:36:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:43,909 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2019-11-23 20:36:43,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:36:43,910 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 117 [2019-11-23 20:36:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:43,911 INFO L225 Difference]: With dead ends: 172 [2019-11-23 20:36:43,911 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:36:43,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:36:43,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:36:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2019-11-23 20:36:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 20:36:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2019-11-23 20:36:43,918 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2019-11-23 20:36:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:43,919 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2019-11-23 20:36:43,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:36:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2019-11-23 20:36:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 20:36:43,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:43,920 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 11, 11, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:44,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:44,124 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:44,124 INFO L82 PathProgramCache]: Analyzing trace with hash -727649555, now seen corresponding path program 27 times [2019-11-23 20:36:44,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:44,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535295744] [2019-11-23 20:36:44,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat