java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:26,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:26,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:26,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:26,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:26,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:26,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:26,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:26,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:26,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:26,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:26,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:26,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:26,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:26,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:26,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:26,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:26,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:26,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:26,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:26,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:26,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:26,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:26,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:26,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:26,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:26,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:26,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:26,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:26,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:26,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:26,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:26,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:26,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:26,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:26,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:26,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:45:27,018 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:27,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:27,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:27,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:27,020 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:27,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:27,026 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:27,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:27,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:27,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:27,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:27,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:27,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:27,027 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:27,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:27,028 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:27,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:27,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:27,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:27,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:27,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:27,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:27,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:27,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:27,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:27,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:27,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:27,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:27,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:27,308 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:27,328 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:27,332 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:27,333 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:27,334 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:27,334 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2019-10-14 21:45:27,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5ee5c4a/01366857abd6421783a33619f06cfff5/FLAGc885d4648 [2019-10-14 21:45:27,868 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:27,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2019-10-14 21:45:27,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5ee5c4a/01366857abd6421783a33619f06cfff5/FLAGc885d4648 [2019-10-14 21:45:28,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5ee5c4a/01366857abd6421783a33619f06cfff5 [2019-10-14 21:45:28,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:28,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:28,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:28,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:28,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:28,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:28" (1/1) ... [2019-10-14 21:45:28,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc525ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28, skipping insertion in model container [2019-10-14 21:45:28,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:28" (1/1) ... [2019-10-14 21:45:28,300 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:28,320 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:28,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:28,564 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:28,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:28,603 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:28,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28 WrapperNode [2019-10-14 21:45:28,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:28,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:28,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:28,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:28,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28" (1/1) ... [2019-10-14 21:45:28,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28" (1/1) ... [2019-10-14 21:45:28,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28" (1/1) ... [2019-10-14 21:45:28,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28" (1/1) ... [2019-10-14 21:45:28,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28" (1/1) ... [2019-10-14 21:45:28,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28" (1/1) ... [2019-10-14 21:45:28,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28" (1/1) ... [2019-10-14 21:45:28,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:28,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:28,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:28,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:28,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:28,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:28,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:28,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:28,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:28,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:28,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:28,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:45:28,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:28,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:28,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:28,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:28,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:28,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:28,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:29,077 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:29,077 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:45:29,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:29 BoogieIcfgContainer [2019-10-14 21:45:29,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:29,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:29,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:29,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:29,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:28" (1/3) ... [2019-10-14 21:45:29,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7063fb04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:29, skipping insertion in model container [2019-10-14 21:45:29,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:28" (2/3) ... [2019-10-14 21:45:29,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7063fb04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:29, skipping insertion in model container [2019-10-14 21:45:29,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:29" (3/3) ... [2019-10-14 21:45:29,096 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2019-10-14 21:45:29,106 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:29,115 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:29,128 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:29,159 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:29,159 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:29,160 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:29,160 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:29,160 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:29,160 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:29,160 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:29,160 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-14 21:45:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:45:29,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:29,185 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:29,187 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1241254978, now seen corresponding path program 1 times [2019-10-14 21:45:29,201 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:29,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028257095] [2019-10-14 21:45:29,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:29,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028257095] [2019-10-14 21:45:29,381 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:29,382 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:29,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176722989] [2019-10-14 21:45:29,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:29,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:29,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:29,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:29,408 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-14 21:45:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:29,517 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2019-10-14 21:45:29,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:29,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:45:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:29,527 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:45:29,528 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 21:45:29,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 21:45:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 21:45:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:45:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-10-14 21:45:29,573 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2019-10-14 21:45:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:29,573 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-10-14 21:45:29,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-10-14 21:45:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:45:29,575 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:29,575 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:29,576 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:29,576 INFO L82 PathProgramCache]: Analyzing trace with hash -159068691, now seen corresponding path program 1 times [2019-10-14 21:45:29,577 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:29,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257474876] [2019-10-14 21:45:29,578 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,578 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:29,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257474876] [2019-10-14 21:45:29,691 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:29,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:29,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368764737] [2019-10-14 21:45:29,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:29,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:29,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:29,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:29,695 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-10-14 21:45:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:29,790 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-10-14 21:45:29,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:29,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:45:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:29,792 INFO L225 Difference]: With dead ends: 40 [2019-10-14 21:45:29,792 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:45:29,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:45:29,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-14 21:45:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:45:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-14 21:45:29,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-10-14 21:45:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:29,808 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-14 21:45:29,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-14 21:45:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:45:29,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:29,811 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:29,812 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:29,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1675123339, now seen corresponding path program 1 times [2019-10-14 21:45:29,814 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:29,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481462829] [2019-10-14 21:45:29,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:45:29,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481462829] [2019-10-14 21:45:29,878 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:29,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:29,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524971320] [2019-10-14 21:45:29,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:29,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:29,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:29,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:29,881 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-10-14 21:45:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:29,961 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-10-14 21:45:29,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:29,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 21:45:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:29,962 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:45:29,963 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:45:29,963 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:45:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-10-14 21:45:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:45:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 21:45:29,970 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-10-14 21:45:29,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:29,970 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 21:45:29,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 21:45:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:45:29,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:29,972 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:29,972 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:29,972 INFO L82 PathProgramCache]: Analyzing trace with hash 99818017, now seen corresponding path program 1 times [2019-10-14 21:45:29,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:29,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149629711] [2019-10-14 21:45:29,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:45:30,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149629711] [2019-10-14 21:45:30,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28039867] [2019-10-14 21:45:30,064 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 [2019-10-14 21:45:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:30,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:30,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:45:30,190 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:30,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:30,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992364806] [2019-10-14 21:45:30,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:30,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:30,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:30,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:30,197 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-14 21:45:30,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:30,303 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-14 21:45:30,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:30,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:45:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:30,305 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:45:30,305 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:45:30,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:45:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 21:45:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:45:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 21:45:30,312 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2019-10-14 21:45:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:30,312 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 21:45:30,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 21:45:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:45:30,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:30,314 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:30,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:30,520 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:30,520 INFO L82 PathProgramCache]: Analyzing trace with hash -392904637, now seen corresponding path program 2 times [2019-10-14 21:45:30,521 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:30,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926277736] [2019-10-14 21:45:30,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:30,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:30,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:45:30,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926277736] [2019-10-14 21:45:30,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566444475] [2019-10-14 21:45:30,643 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 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 [2019-10-14 21:45:30,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:30,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:30,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:30,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:45:30,746 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:30,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:30,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389148727] [2019-10-14 21:45:30,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:30,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:30,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:30,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:30,749 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2019-10-14 21:45:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:30,829 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-10-14 21:45:30,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:30,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-10-14 21:45:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:30,830 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:45:30,830 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:45:30,831 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:45:30,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:45:30,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:45:30,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-14 21:45:30,837 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2019-10-14 21:45:30,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:30,837 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-14 21:45:30,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-14 21:45:30,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:45:30,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:30,839 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:31,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:31,044 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:31,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:31,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1452972571, now seen corresponding path program 3 times [2019-10-14 21:45:31,045 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:31,046 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105474803] [2019-10-14 21:45:31,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:31,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:31,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:45:31,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105474803] [2019-10-14 21:45:31,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257664865] [2019-10-14 21:45:31,155 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 [2019-10-14 21:45:31,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:45:31,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:31,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:31,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:45:31,254 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:31,254 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 21:45:31,255 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112154865] [2019-10-14 21:45:31,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:31,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:31,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:31,256 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2019-10-14 21:45:31,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:31,371 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2019-10-14 21:45:31,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:45:31,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-14 21:45:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:31,372 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:45:31,372 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:45:31,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:45:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-10-14 21:45:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:45:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-14 21:45:31,385 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2019-10-14 21:45:31,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:31,385 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-14 21:45:31,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:31,386 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-14 21:45:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:45:31,389 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:31,389 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:31,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:31,594 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:31,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:31,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1548834779, now seen corresponding path program 4 times [2019-10-14 21:45:31,595 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:31,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625196637] [2019-10-14 21:45:31,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:31,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:31,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:45:31,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625196637] [2019-10-14 21:45:31,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626847452] [2019-10-14 21:45:31,705 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 [2019-10-14 21:45:31,757 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:31,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:31,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:31,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:45:31,781 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:31,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:31,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909096181] [2019-10-14 21:45:31,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:31,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:31,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:31,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:31,783 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2019-10-14 21:45:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:31,874 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-10-14 21:45:31,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:31,875 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-10-14 21:45:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:31,876 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:45:31,876 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:45:31,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:45:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-14 21:45:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:45:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-14 21:45:31,887 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2019-10-14 21:45:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:31,887 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-14 21:45:31,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-14 21:45:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:45:31,889 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:31,890 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:32,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:32,094 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:32,095 INFO L82 PathProgramCache]: Analyzing trace with hash 927516739, now seen corresponding path program 5 times [2019-10-14 21:45:32,095 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:32,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525843347] [2019-10-14 21:45:32,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:32,096 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:32,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:45:32,198 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525843347] [2019-10-14 21:45:32,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959319051] [2019-10-14 21:45:32,199 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 [2019-10-14 21:45:32,258 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:45:32,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:32,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:32,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:45:32,305 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:32,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:45:32,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033923175] [2019-10-14 21:45:32,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:45:32,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:45:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:32,310 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2019-10-14 21:45:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:32,427 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2019-10-14 21:45:32,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:45:32,432 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2019-10-14 21:45:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:32,433 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:45:32,433 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:45:32,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:45:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-10-14 21:45:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:45:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-14 21:45:32,439 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2019-10-14 21:45:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:32,440 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-14 21:45:32,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:45:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-14 21:45:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:45:32,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:32,441 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:32,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:32,646 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:32,647 INFO L82 PathProgramCache]: Analyzing trace with hash -649169909, now seen corresponding path program 6 times [2019-10-14 21:45:32,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:32,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895458642] [2019-10-14 21:45:32,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:32,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:32,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:32,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895458642] [2019-10-14 21:45:32,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052674486] [2019-10-14 21:45:32,782 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 [2019-10-14 21:45:32,830 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:45:32,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:32,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:45:32,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:32,970 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-10-14 21:45:32,971 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:45:32,978 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:45:32,978 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:45:32,979 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:45:33,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:45:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-14 21:45:33,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:33,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-10-14 21:45:33,049 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131227775] [2019-10-14 21:45:33,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:45:33,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:45:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:45:33,052 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 18 states. [2019-10-14 21:45:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:33,485 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2019-10-14 21:45:33,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:45:33,486 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2019-10-14 21:45:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:33,497 INFO L225 Difference]: With dead ends: 84 [2019-10-14 21:45:33,497 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:45:33,498 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:45:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:45:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-10-14 21:45:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:45:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2019-10-14 21:45:33,511 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 36 [2019-10-14 21:45:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:33,511 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2019-10-14 21:45:33,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:45:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2019-10-14 21:45:33,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:45:33,513 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:33,513 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:33,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:33,718 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:33,719 INFO L82 PathProgramCache]: Analyzing trace with hash 233486379, now seen corresponding path program 1 times [2019-10-14 21:45:33,719 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:33,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887476243] [2019-10-14 21:45:33,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:33,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:33,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:33,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887476243] [2019-10-14 21:45:33,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214487185] [2019-10-14 21:45:33,844 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 [2019-10-14 21:45:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:33,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:45:33,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:33,917 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:33,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:45:33,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770338580] [2019-10-14 21:45:33,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:45:33,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:33,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:45:33,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:33,919 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 12 states. [2019-10-14 21:45:34,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:34,057 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2019-10-14 21:45:34,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:45:34,058 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2019-10-14 21:45:34,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:34,061 INFO L225 Difference]: With dead ends: 92 [2019-10-14 21:45:34,061 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:45:34,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:45:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 21:45:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:45:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-10-14 21:45:34,069 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 38 [2019-10-14 21:45:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:34,069 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-10-14 21:45:34,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:45:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-10-14 21:45:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:45:34,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:34,071 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:34,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:34,274 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1236280883, now seen corresponding path program 2 times [2019-10-14 21:45:34,275 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:34,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72246935] [2019-10-14 21:45:34,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:34,276 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:34,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:34,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72246935] [2019-10-14 21:45:34,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550654420] [2019-10-14 21:45:34,385 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 [2019-10-14 21:45:34,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:34,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:34,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:45:34,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:34,466 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:34,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:45:34,467 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036941791] [2019-10-14 21:45:34,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:45:34,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:34,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:45:34,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:34,469 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 13 states. [2019-10-14 21:45:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:34,572 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2019-10-14 21:45:34,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:45:34,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2019-10-14 21:45:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:34,574 INFO L225 Difference]: With dead ends: 94 [2019-10-14 21:45:34,574 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:45:34,575 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:34,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:45:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-14 21:45:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 21:45:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2019-10-14 21:45:34,582 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 40 [2019-10-14 21:45:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:34,583 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2019-10-14 21:45:34,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:45:34,583 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2019-10-14 21:45:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:45:34,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:34,584 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:34,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:34,788 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash -638379281, now seen corresponding path program 3 times [2019-10-14 21:45:34,789 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:34,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241002584] [2019-10-14 21:45:34,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:34,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:34,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:34,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241002584] [2019-10-14 21:45:34,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97016439] [2019-10-14 21:45:34,963 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 [2019-10-14 21:45:35,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:35,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:35,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:45:35,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:35,206 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:45:35,206 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-10-14 21:45:35,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:45:35,209 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:45:35,213 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:45:35,214 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:45:35,214 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-14 21:45:35,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:45:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-14 21:45:35,275 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:35,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-10-14 21:45:35,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109183534] [2019-10-14 21:45:35,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:45:35,276 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:35,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:45:35,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:45:35,277 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 23 states. [2019-10-14 21:45:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:36,099 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2019-10-14 21:45:36,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:45:36,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2019-10-14 21:45:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:36,101 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:45:36,101 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:45:36,102 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=1221, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:45:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:45:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2019-10-14 21:45:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:45:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2019-10-14 21:45:36,115 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 42 [2019-10-14 21:45:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:36,115 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2019-10-14 21:45:36,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:45:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2019-10-14 21:45:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:45:36,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:36,121 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:36,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:36,326 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:36,327 INFO L82 PathProgramCache]: Analyzing trace with hash 115460810, now seen corresponding path program 1 times [2019-10-14 21:45:36,327 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:36,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723746421] [2019-10-14 21:45:36,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:36,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:36,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:45:36,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723746421] [2019-10-14 21:45:36,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244662127] [2019-10-14 21:45:36,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:36,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:45:36,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:45:36,547 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:36,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:45:36,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063580899] [2019-10-14 21:45:36,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:36,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:36,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:36,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:36,549 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 15 states. [2019-10-14 21:45:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:36,680 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2019-10-14 21:45:36,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:45:36,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-10-14 21:45:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:36,682 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:45:36,682 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:45:36,683 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:45:36,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 21:45:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:45:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2019-10-14 21:45:36,691 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 52 [2019-10-14 21:45:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:36,691 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2019-10-14 21:45:36,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2019-10-14 21:45:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:45:36,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:36,692 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:36,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:36,897 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:36,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:36,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1072535316, now seen corresponding path program 2 times [2019-10-14 21:45:36,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:36,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66308923] [2019-10-14 21:45:36,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:36,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:36,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:45:37,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66308923] [2019-10-14 21:45:37,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038083841] [2019-10-14 21:45:37,042 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:37,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:37,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:37,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:45:37,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:45:37,154 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:37,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:45:37,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889110177] [2019-10-14 21:45:37,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:45:37,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:37,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:45:37,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:45:37,156 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 16 states. [2019-10-14 21:45:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:37,299 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2019-10-14 21:45:37,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:45:37,300 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2019-10-14 21:45:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:37,301 INFO L225 Difference]: With dead ends: 88 [2019-10-14 21:45:37,301 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:45:37,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:45:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:45:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-14 21:45:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 21:45:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2019-10-14 21:45:37,309 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 54 [2019-10-14 21:45:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:37,309 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2019-10-14 21:45:37,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:45:37,310 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2019-10-14 21:45:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:45:37,310 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:37,311 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:37,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:37,522 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash -275511666, now seen corresponding path program 3 times [2019-10-14 21:45:37,523 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:37,523 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178045555] [2019-10-14 21:45:37,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:37,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:37,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:45:37,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178045555] [2019-10-14 21:45:37,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716049107] [2019-10-14 21:45:37,734 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:37,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:45:37,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:37,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:37,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-14 21:45:37,846 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:37,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 21:45:37,847 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653629381] [2019-10-14 21:45:37,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:45:37,847 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:45:37,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:45:37,848 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 20 states. [2019-10-14 21:45:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:38,023 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2019-10-14 21:45:38,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:45:38,024 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2019-10-14 21:45:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:38,025 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:45:38,025 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:45:38,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:45:38,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:45:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-10-14 21:45:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:45:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2019-10-14 21:45:38,033 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 56 [2019-10-14 21:45:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:38,033 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2019-10-14 21:45:38,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:45:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2019-10-14 21:45:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:45:38,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:38,035 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:38,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:38,239 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:38,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1179500886, now seen corresponding path program 4 times [2019-10-14 21:45:38,240 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:38,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113328239] [2019-10-14 21:45:38,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:38,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:38,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:38,453 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113328239] [2019-10-14 21:45:38,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941764933] [2019-10-14 21:45:38,455 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:38,528 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:38,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:38,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:45:38,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:45:38,576 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:38,576 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:45:38,576 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155498892] [2019-10-14 21:45:38,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:45:38,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:38,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:45:38,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:45:38,578 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 18 states. [2019-10-14 21:45:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:38,656 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2019-10-14 21:45:38,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:45:38,656 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2019-10-14 21:45:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:38,658 INFO L225 Difference]: With dead ends: 98 [2019-10-14 21:45:38,658 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:45:38,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:45:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:45:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-14 21:45:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:45:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2019-10-14 21:45:38,666 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 61 [2019-10-14 21:45:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:38,666 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2019-10-14 21:45:38,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:45:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2019-10-14 21:45:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:45:38,667 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:38,667 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:38,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:38,872 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:38,872 INFO L82 PathProgramCache]: Analyzing trace with hash 471099080, now seen corresponding path program 5 times [2019-10-14 21:45:38,872 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:38,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132392903] [2019-10-14 21:45:38,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:38,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:38,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:39,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132392903] [2019-10-14 21:45:39,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828845039] [2019-10-14 21:45:39,062 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 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 [2019-10-14 21:45:39,181 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-14 21:45:39,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:39,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:45:39,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:45:39,227 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:39,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:45:39,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700991996] [2019-10-14 21:45:39,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:45:39,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:45:39,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:45:39,229 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 19 states. [2019-10-14 21:45:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:39,370 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2019-10-14 21:45:39,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:45:39,371 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2019-10-14 21:45:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:39,372 INFO L225 Difference]: With dead ends: 100 [2019-10-14 21:45:39,372 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 21:45:39,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:45:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 21:45:39,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-10-14 21:45:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 21:45:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-10-14 21:45:39,379 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 63 [2019-10-14 21:45:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:39,380 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-10-14 21:45:39,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:45:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-10-14 21:45:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:45:39,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:39,381 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:39,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:39,586 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:39,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:39,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1854734182, now seen corresponding path program 6 times [2019-10-14 21:45:39,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:39,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141587961] [2019-10-14 21:45:39,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:39,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:39,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:39,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141587961] [2019-10-14 21:45:39,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52002594] [2019-10-14 21:45:39,813 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 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 [2019-10-14 21:45:39,889 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:45:39,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:39,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:39,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-10-14 21:45:39,992 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:39,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 21:45:39,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724418465] [2019-10-14 21:45:39,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:45:39,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:45:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:45:39,993 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 24 states. [2019-10-14 21:45:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:40,107 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2019-10-14 21:45:40,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:45:40,108 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2019-10-14 21:45:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:40,109 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:45:40,109 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:45:40,110 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:45:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:45:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-10-14 21:45:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:45:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2019-10-14 21:45:40,128 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 65 [2019-10-14 21:45:40,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:40,128 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2019-10-14 21:45:40,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:45:40,128 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2019-10-14 21:45:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 21:45:40,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:40,129 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:40,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:40,334 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:40,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:40,334 INFO L82 PathProgramCache]: Analyzing trace with hash 959641942, now seen corresponding path program 7 times [2019-10-14 21:45:40,334 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:40,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415354513] [2019-10-14 21:45:40,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:40,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:40,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:45:40,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415354513] [2019-10-14 21:45:40,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631764697] [2019-10-14 21:45:40,546 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:40,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:45:40,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:45:40,640 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:40,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:45:40,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665637473] [2019-10-14 21:45:40,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:45:40,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:40,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:45:40,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:45:40,642 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 21 states. [2019-10-14 21:45:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:40,751 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2019-10-14 21:45:40,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:45:40,751 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2019-10-14 21:45:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:40,752 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:45:40,752 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:45:40,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:45:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:45:40,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-14 21:45:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 21:45:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2019-10-14 21:45:40,762 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 70 [2019-10-14 21:45:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:40,763 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2019-10-14 21:45:40,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:45:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2019-10-14 21:45:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 21:45:40,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:40,764 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:40,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:40,968 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:40,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:40,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2136543992, now seen corresponding path program 8 times [2019-10-14 21:45:40,968 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:40,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816454345] [2019-10-14 21:45:40,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:40,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:40,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:45:41,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816454345] [2019-10-14 21:45:41,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270374229] [2019-10-14 21:45:41,207 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:41,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:41,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:41,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:45:41,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:45:41,301 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:41,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:45:41,302 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35532410] [2019-10-14 21:45:41,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:45:41,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:45:41,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:45:41,303 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 22 states. [2019-10-14 21:45:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:41,502 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2019-10-14 21:45:41,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:45:41,503 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2019-10-14 21:45:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:41,504 INFO L225 Difference]: With dead ends: 112 [2019-10-14 21:45:41,504 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 21:45:41,504 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:45:41,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 21:45:41,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-14 21:45:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 21:45:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2019-10-14 21:45:41,510 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 72 [2019-10-14 21:45:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:41,511 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2019-10-14 21:45:41,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:45:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2019-10-14 21:45:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:45:41,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:41,512 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:41,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:41,716 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash -731952102, now seen corresponding path program 9 times [2019-10-14 21:45:41,717 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:41,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548281398] [2019-10-14 21:45:41,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:41,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:41,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:45:41,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548281398] [2019-10-14 21:45:41,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056963285] [2019-10-14 21:45:41,964 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:42,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:45:42,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:42,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:45:42,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-14 21:45:42,100 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:42,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-10-14 21:45:42,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653884512] [2019-10-14 21:45:42,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:45:42,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:42,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:45:42,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:45:42,101 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 28 states. [2019-10-14 21:45:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:42,386 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2019-10-14 21:45:42,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:45:42,387 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2019-10-14 21:45:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:42,388 INFO L225 Difference]: With dead ends: 119 [2019-10-14 21:45:42,388 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:45:42,389 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:45:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:45:42,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2019-10-14 21:45:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-14 21:45:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2019-10-14 21:45:42,396 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 74 [2019-10-14 21:45:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:42,396 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2019-10-14 21:45:42,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:45:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2019-10-14 21:45:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 21:45:42,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:42,397 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:42,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:42,598 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:42,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:42,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1019932130, now seen corresponding path program 10 times [2019-10-14 21:45:42,599 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:42,599 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756581570] [2019-10-14 21:45:42,599 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:42,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:42,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:45:42,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756581570] [2019-10-14 21:45:42,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761697371] [2019-10-14 21:45:42,908 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 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 [2019-10-14 21:45:42,981 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:42,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:42,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:45:42,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:45:43,007 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:43,007 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:45:43,007 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124280871] [2019-10-14 21:45:43,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:45:43,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:43,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:45:43,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:45:43,009 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 24 states. [2019-10-14 21:45:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:43,185 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2019-10-14 21:45:43,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:45:43,188 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2019-10-14 21:45:43,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:43,189 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:45:43,189 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:45:43,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:45:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:45:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-10-14 21:45:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 21:45:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2019-10-14 21:45:43,195 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 79 [2019-10-14 21:45:43,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:43,196 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2019-10-14 21:45:43,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:45:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2019-10-14 21:45:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:45:43,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:43,197 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:43,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:43,402 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:43,402 INFO L82 PathProgramCache]: Analyzing trace with hash -900419908, now seen corresponding path program 11 times [2019-10-14 21:45:43,402 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:43,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691227949] [2019-10-14 21:45:43,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:43,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:43,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:45:43,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691227949] [2019-10-14 21:45:43,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422660827] [2019-10-14 21:45:43,658 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:43,963 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-14 21:45:43,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:43,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:45:43,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:45:43,988 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:43,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:45:43,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331708501] [2019-10-14 21:45:43,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:45:43,989 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:43,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:45:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:45:43,990 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 25 states. [2019-10-14 21:45:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:44,139 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2019-10-14 21:45:44,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:45:44,139 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2019-10-14 21:45:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:44,141 INFO L225 Difference]: With dead ends: 124 [2019-10-14 21:45:44,141 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 21:45:44,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:45:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 21:45:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-10-14 21:45:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:45:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2019-10-14 21:45:44,148 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 81 [2019-10-14 21:45:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:44,148 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2019-10-14 21:45:44,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:45:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2019-10-14 21:45:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:45:44,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:44,149 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:44,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:44,352 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:44,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2013291558, now seen corresponding path program 12 times [2019-10-14 21:45:44,353 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:44,353 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517348241] [2019-10-14 21:45:44,353 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:44,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:44,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:45:44,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517348241] [2019-10-14 21:45:44,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352872263] [2019-10-14 21:45:44,645 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:44,748 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 21:45:44,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:44,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:45:44,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:44,941 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-10-14 21:45:44,941 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:45:44,944 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:45:44,944 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:45:44,944 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:45:44,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:45:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2019-10-14 21:45:45,047 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:45,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 37 [2019-10-14 21:45:45,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919209021] [2019-10-14 21:45:45,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:45:45,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:45,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:45:45,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1021, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:45:45,051 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 37 states. [2019-10-14 21:45:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:46,416 INFO L93 Difference]: Finished difference Result 154 states and 177 transitions. [2019-10-14 21:45:46,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 21:45:46,417 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2019-10-14 21:45:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:46,418 INFO L225 Difference]: With dead ends: 154 [2019-10-14 21:45:46,418 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 21:45:46,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=922, Invalid=3770, Unknown=0, NotChecked=0, Total=4692 [2019-10-14 21:45:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 21:45:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2019-10-14 21:45:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-14 21:45:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2019-10-14 21:45:46,436 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 83 [2019-10-14 21:45:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:46,436 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2019-10-14 21:45:46,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:45:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2019-10-14 21:45:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-14 21:45:46,439 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:46,440 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:46,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:46,644 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:46,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash -447742602, now seen corresponding path program 1 times [2019-10-14 21:45:46,645 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:46,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624038025] [2019-10-14 21:45:46,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:46,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:46,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:45:47,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624038025] [2019-10-14 21:45:47,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754736943] [2019-10-14 21:45:47,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:47,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:45:47,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:45:47,223 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:47,223 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:45:47,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020535037] [2019-10-14 21:45:47,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:45:47,224 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:47,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:45:47,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:45:47,225 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 27 states. [2019-10-14 21:45:47,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:47,426 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2019-10-14 21:45:47,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:45:47,427 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 85 [2019-10-14 21:45:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:47,428 INFO L225 Difference]: With dead ends: 172 [2019-10-14 21:45:47,428 INFO L226 Difference]: Without dead ends: 113 [2019-10-14 21:45:47,429 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:45:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-10-14 21:45:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-10-14 21:45:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-14 21:45:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2019-10-14 21:45:47,436 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 85 [2019-10-14 21:45:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:47,436 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2019-10-14 21:45:47,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:45:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2019-10-14 21:45:47,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 21:45:47,438 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:47,438 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:47,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:47,642 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash -882693228, now seen corresponding path program 2 times [2019-10-14 21:45:47,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:47,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254291455] [2019-10-14 21:45:47,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:47,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:47,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:45:47,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254291455] [2019-10-14 21:45:47,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032650140] [2019-10-14 21:45:47,979 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:48,051 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:48,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:48,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:45:48,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:45:48,077 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:48,077 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 21:45:48,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512337360] [2019-10-14 21:45:48,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:45:48,078 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:48,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:45:48,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:45:48,079 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand 28 states. [2019-10-14 21:45:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:48,281 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2019-10-14 21:45:48,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:45:48,281 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2019-10-14 21:45:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:48,283 INFO L225 Difference]: With dead ends: 174 [2019-10-14 21:45:48,283 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 21:45:48,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:45:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 21:45:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-10-14 21:45:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-14 21:45:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2019-10-14 21:45:48,292 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 87 [2019-10-14 21:45:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:48,292 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2019-10-14 21:45:48,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:45:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2019-10-14 21:45:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:45:48,293 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:48,293 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:48,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:48,497 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2036550194, now seen corresponding path program 3 times [2019-10-14 21:45:48,498 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:48,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263134171] [2019-10-14 21:45:48,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:48,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:48,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:45:48,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263134171] [2019-10-14 21:45:48,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602434333] [2019-10-14 21:45:48,855 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:48,934 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:45:48,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:48,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:45:48,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:49,363 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:45:49,364 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-10-14 21:45:49,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:45:49,365 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:45:49,369 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:45:49,369 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:45:49,369 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-14 21:45:49,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:45:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2019-10-14 21:45:49,456 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:49,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 43 [2019-10-14 21:45:49,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619766804] [2019-10-14 21:45:49,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-14 21:45:49,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-14 21:45:49,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1404, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:45:49,458 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 43 states. [2019-10-14 21:45:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:51,444 INFO L93 Difference]: Finished difference Result 200 states and 226 transitions. [2019-10-14 21:45:51,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-14 21:45:51,445 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 89 [2019-10-14 21:45:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:51,446 INFO L225 Difference]: With dead ends: 200 [2019-10-14 21:45:51,446 INFO L226 Difference]: Without dead ends: 141 [2019-10-14 21:45:51,448 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1164, Invalid=4688, Unknown=0, NotChecked=0, Total=5852 [2019-10-14 21:45:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-14 21:45:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 102. [2019-10-14 21:45:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-14 21:45:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2019-10-14 21:45:51,457 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 89 [2019-10-14 21:45:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:51,458 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2019-10-14 21:45:51,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-14 21:45:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2019-10-14 21:45:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 21:45:51,459 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:51,459 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:51,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:51,663 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash -803465335, now seen corresponding path program 13 times [2019-10-14 21:45:51,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:51,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447516733] [2019-10-14 21:45:51,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:51,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:51,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 4 proven. 625 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 21:45:52,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447516733] [2019-10-14 21:45:52,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928096447] [2019-10-14 21:45:52,010 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 [2019-10-14 21:45:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:52,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:45:52,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:45:52,116 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:52,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:45:52,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107685275] [2019-10-14 21:45:52,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:45:52,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:45:52,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:45:52,118 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 30 states. [2019-10-14 21:45:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:52,252 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2019-10-14 21:45:52,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:45:52,252 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 99 [2019-10-14 21:45:52,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:52,254 INFO L225 Difference]: With dead ends: 150 [2019-10-14 21:45:52,254 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 21:45:52,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:45:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 21:45:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-10-14 21:45:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-14 21:45:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2019-10-14 21:45:52,262 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 99 [2019-10-14 21:45:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:52,262 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2019-10-14 21:45:52,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:45:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2019-10-14 21:45:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 21:45:52,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:52,263 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:52,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:52,467 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:52,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:52,468 INFO L82 PathProgramCache]: Analyzing trace with hash 230504743, now seen corresponding path program 14 times [2019-10-14 21:45:52,468 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:52,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591075818] [2019-10-14 21:45:52,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:52,469 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:52,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 4 proven. 676 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 21:45:52,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591075818] [2019-10-14 21:45:52,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460812448] [2019-10-14 21:45:52,872 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 [2019-10-14 21:45:52,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:52,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:52,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:45:52,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:45:53,006 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:53,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:45:53,006 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301278104] [2019-10-14 21:45:53,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:45:53,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:53,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:45:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:45:53,008 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 31 states. [2019-10-14 21:45:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:53,135 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2019-10-14 21:45:53,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:45:53,135 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 101 [2019-10-14 21:45:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:53,137 INFO L225 Difference]: With dead ends: 152 [2019-10-14 21:45:53,137 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:45:53,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:45:53,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:45:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-10-14 21:45:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-14 21:45:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2019-10-14 21:45:53,145 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 101 [2019-10-14 21:45:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:53,145 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2019-10-14 21:45:53,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:45:53,146 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2019-10-14 21:45:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 21:45:53,146 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:53,146 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:53,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:53,351 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:53,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1738304325, now seen corresponding path program 15 times [2019-10-14 21:45:53,352 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:53,352 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518487751] [2019-10-14 21:45:53,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:53,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:53,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 4 proven. 729 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 21:45:53,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518487751] [2019-10-14 21:45:53,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524815400] [2019-10-14 21:45:53,845 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 [2019-10-14 21:45:53,928 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 21:45:53,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:53,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:45:53,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 745 trivial. 0 not checked. [2019-10-14 21:45:54,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:54,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 9] total 38 [2019-10-14 21:45:54,079 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776059596] [2019-10-14 21:45:54,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 21:45:54,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:54,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 21:45:54,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=934, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:45:54,086 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand 38 states. [2019-10-14 21:45:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:54,406 INFO L93 Difference]: Finished difference Result 159 states and 178 transitions. [2019-10-14 21:45:54,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 21:45:54,406 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2019-10-14 21:45:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:54,408 INFO L225 Difference]: With dead ends: 159 [2019-10-14 21:45:54,408 INFO L226 Difference]: Without dead ends: 114 [2019-10-14 21:45:54,409 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=934, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:45:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-14 21:45:54,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2019-10-14 21:45:54,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-14 21:45:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2019-10-14 21:45:54,422 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 103 [2019-10-14 21:45:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:54,423 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2019-10-14 21:45:54,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 21:45:54,423 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2019-10-14 21:45:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-14 21:45:54,424 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:54,424 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:54,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:54,632 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:54,632 INFO L82 PathProgramCache]: Analyzing trace with hash 659558757, now seen corresponding path program 16 times [2019-10-14 21:45:54,632 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:54,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155968104] [2019-10-14 21:45:54,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:54,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:54,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 4 proven. 784 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-14 21:45:55,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155968104] [2019-10-14 21:45:55,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358910650] [2019-10-14 21:45:55,307 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 [2019-10-14 21:45:55,425 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:55,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:55,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:45:55,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-14 21:45:55,458 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:55,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 21:45:55,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528059618] [2019-10-14 21:45:55,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:45:55,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:45:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:45:55,460 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand 33 states. [2019-10-14 21:45:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:55,655 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2019-10-14 21:45:55,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:45:55,656 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 108 [2019-10-14 21:45:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:55,657 INFO L225 Difference]: With dead ends: 162 [2019-10-14 21:45:55,657 INFO L226 Difference]: Without dead ends: 114 [2019-10-14 21:45:55,658 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:45:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-14 21:45:55,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-10-14 21:45:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-14 21:45:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2019-10-14 21:45:55,665 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 108 [2019-10-14 21:45:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:55,665 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2019-10-14 21:45:55,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:45:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2019-10-14 21:45:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:45:55,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:55,666 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:55,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:55,870 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash -340270713, now seen corresponding path program 17 times [2019-10-14 21:45:55,871 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:55,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414378247] [2019-10-14 21:45:55,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:55,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:55,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 4 proven. 841 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-14 21:45:56,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414378247] [2019-10-14 21:45:56,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357715271] [2019-10-14 21:45:56,488 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 [2019-10-14 21:45:57,936 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-10-14 21:45:57,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:57,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:45:57,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2019-10-14 21:45:58,094 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:58,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 10] total 41 [2019-10-14 21:45:58,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089576928] [2019-10-14 21:45:58,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-14 21:45:58,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:58,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-14 21:45:58,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 21:45:58,096 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 41 states. [2019-10-14 21:45:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:58,472 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2019-10-14 21:45:58,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 21:45:58,473 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 110 [2019-10-14 21:45:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:58,474 INFO L225 Difference]: With dead ends: 169 [2019-10-14 21:45:58,474 INFO L226 Difference]: Without dead ends: 121 [2019-10-14 21:45:58,476 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 21:45:58,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-14 21:45:58,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2019-10-14 21:45:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-14 21:45:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2019-10-14 21:45:58,485 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 110 [2019-10-14 21:45:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:58,486 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2019-10-14 21:45:58,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-14 21:45:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2019-10-14 21:45:58,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-14 21:45:58,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:58,487 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:58,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:58,690 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash 773087327, now seen corresponding path program 18 times [2019-10-14 21:45:58,691 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:58,691 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631995254] [2019-10-14 21:45:58,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:58,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:58,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 4 proven. 900 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-10-14 21:45:59,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631995254] [2019-10-14 21:45:59,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714147965] [2019-10-14 21:45:59,155 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 [2019-10-14 21:45:59,435 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 21:45:59,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:59,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:45:59,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2019-10-14 21:45:59,591 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:59,591 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2019-10-14 21:45:59,591 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859804771] [2019-10-14 21:45:59,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-14 21:45:59,592 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:59,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-14 21:45:59,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:45:59,593 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 43 states. [2019-10-14 21:46:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:00,055 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2019-10-14 21:46:00,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-14 21:46:00,056 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 115 [2019-10-14 21:46:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:00,058 INFO L225 Difference]: With dead ends: 177 [2019-10-14 21:46:00,058 INFO L226 Difference]: Without dead ends: 126 [2019-10-14 21:46:00,059 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:46:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-14 21:46:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2019-10-14 21:46:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-10-14 21:46:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 134 transitions. [2019-10-14 21:46:00,071 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 134 transitions. Word has length 115 [2019-10-14 21:46:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:00,072 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 134 transitions. [2019-10-14 21:46:00,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-14 21:46:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 134 transitions. [2019-10-14 21:46:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 21:46:00,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:00,074 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:00,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:00,280 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash -249173237, now seen corresponding path program 19 times [2019-10-14 21:46:00,281 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:00,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807298801] [2019-10-14 21:46:00,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:00,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:00,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 4 proven. 961 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-10-14 21:46:00,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807298801] [2019-10-14 21:46:00,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688535648] [2019-10-14 21:46:00,786 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 [2019-10-14 21:46:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:00,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 21:46:00,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-10-14 21:46:00,931 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:00,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-14 21:46:00,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928886763] [2019-10-14 21:46:00,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:46:00,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:00,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:46:00,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:46:00,932 INFO L87 Difference]: Start difference. First operand 123 states and 134 transitions. Second operand 36 states. [2019-10-14 21:46:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:01,177 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2019-10-14 21:46:01,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:46:01,181 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 120 [2019-10-14 21:46:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:01,182 INFO L225 Difference]: With dead ends: 180 [2019-10-14 21:46:01,182 INFO L226 Difference]: Without dead ends: 126 [2019-10-14 21:46:01,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:46:01,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-14 21:46:01,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-10-14 21:46:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 21:46:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2019-10-14 21:46:01,190 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 120 [2019-10-14 21:46:01,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:01,190 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2019-10-14 21:46:01,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:46:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2019-10-14 21:46:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 21:46:01,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:01,191 INFO L380 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:01,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:01,395 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:01,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1975293997, now seen corresponding path program 20 times [2019-10-14 21:46:01,396 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:01,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266932450] [2019-10-14 21:46:01,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:01,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:01,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 4 proven. 1024 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-10-14 21:46:02,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266932450] [2019-10-14 21:46:02,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046608492] [2019-10-14 21:46:02,057 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 [2019-10-14 21:46:02,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:02,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:02,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 21:46:02,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-10-14 21:46:02,188 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:02,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-14 21:46:02,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474834860] [2019-10-14 21:46:02,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:46:02,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:46:02,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:46:02,192 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 37 states. [2019-10-14 21:46:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:02,344 INFO L93 Difference]: Finished difference Result 182 states and 204 transitions. [2019-10-14 21:46:02,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:46:02,345 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 122 [2019-10-14 21:46:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:02,347 INFO L225 Difference]: With dead ends: 182 [2019-10-14 21:46:02,347 INFO L226 Difference]: Without dead ends: 128 [2019-10-14 21:46:02,348 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:46:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-14 21:46:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-10-14 21:46:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-14 21:46:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2019-10-14 21:46:02,359 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 122 [2019-10-14 21:46:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:02,359 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2019-10-14 21:46:02,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:46:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2019-10-14 21:46:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 21:46:02,361 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:02,361 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:02,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:02,566 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:02,567 INFO L82 PathProgramCache]: Analyzing trace with hash 794592463, now seen corresponding path program 21 times [2019-10-14 21:46:02,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:02,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403672115] [2019-10-14 21:46:02,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:02,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:02,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 4 proven. 1089 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-10-14 21:46:03,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403672115] [2019-10-14 21:46:03,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232009926] [2019-10-14 21:46:03,158 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:03,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:46:03,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:03,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:46:03,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:03,757 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-10-14 21:46:03,758 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:03,760 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:03,760 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:03,760 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:46:03,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 1147 trivial. 0 not checked. [2019-10-14 21:46:03,934 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:03,935 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 16] total 51 [2019-10-14 21:46:03,935 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655890248] [2019-10-14 21:46:03,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-14 21:46:03,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:03,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-14 21:46:03,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1878, Unknown=0, NotChecked=0, Total=2550 [2019-10-14 21:46:03,943 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand 51 states. [2019-10-14 21:46:06,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,444 INFO L93 Difference]: Finished difference Result 222 states and 254 transitions. [2019-10-14 21:46:06,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-14 21:46:06,444 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 124 [2019-10-14 21:46:06,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,446 INFO L225 Difference]: With dead ends: 222 [2019-10-14 21:46:06,447 INFO L226 Difference]: Without dead ends: 168 [2019-10-14 21:46:06,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1999, Invalid=7121, Unknown=0, NotChecked=0, Total=9120 [2019-10-14 21:46:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-10-14 21:46:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2019-10-14 21:46:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-14 21:46:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2019-10-14 21:46:06,460 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 124 [2019-10-14 21:46:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,460 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2019-10-14 21:46:06,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-10-14 21:46:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2019-10-14 21:46:06,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:46:06,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,461 INFO L380 BasicCegarLoop]: trace histogram [34, 34, 9, 9, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:06,665 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,666 INFO L82 PathProgramCache]: Analyzing trace with hash -128764177, now seen corresponding path program 4 times [2019-10-14 21:46:06,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852012924] [2019-10-14 21:46:06,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 4 proven. 1156 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-10-14 21:46:07,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852012924] [2019-10-14 21:46:07,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577776575] [2019-10-14 21:46:07,280 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:07,393 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:07,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:07,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-10-14 21:46:07,424 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-10-14 21:46:07,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176942383] [2019-10-14 21:46:07,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 21:46:07,425 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 21:46:07,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:46:07,426 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand 39 states. [2019-10-14 21:46:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:07,568 INFO L93 Difference]: Finished difference Result 250 states and 288 transitions. [2019-10-14 21:46:07,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 21:46:07,570 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 126 [2019-10-14 21:46:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:07,571 INFO L225 Difference]: With dead ends: 250 [2019-10-14 21:46:07,571 INFO L226 Difference]: Without dead ends: 164 [2019-10-14 21:46:07,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:46:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-14 21:46:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2019-10-14 21:46:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-10-14 21:46:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 182 transitions. [2019-10-14 21:46:07,583 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 182 transitions. Word has length 126 [2019-10-14 21:46:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:07,584 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 182 transitions. [2019-10-14 21:46:07,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 21:46:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 182 transitions. [2019-10-14 21:46:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 21:46:07,585 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:07,585 INFO L380 BasicCegarLoop]: trace histogram [35, 35, 9, 9, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]