/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:07:01,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:07:01,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:07:01,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:07:01,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:07:01,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:07:01,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:07:01,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:07:01,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:07:01,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:07:01,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:07:01,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:07:01,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:07:01,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:07:01,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:07:01,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:07:01,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:07:01,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:07:01,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:07:01,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:07:01,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:07:01,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:07:01,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:07:01,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:07:01,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:07:02,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:07:02,024 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:07:02,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:07:02,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:07:02,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:07:02,026 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:07:02,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:07:02,027 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:07:02,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:07:02,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:07:02,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:07:02,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:07:02,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:07:02,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:07:02,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:07:02,029 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:07:02,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:07:02,030 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:07:02,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:07:02,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:07:02,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:07:02,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:07:02,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:07:02,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:07:02,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:07:02,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:07:02,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:07:02,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:07:02,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:07:02,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:07:02,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:07:02,302 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:07:02,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:07:02,319 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:07:02,321 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:07:02,321 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:07:02,322 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2019-11-23 22:07:02,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c6d81cd7/c082786013564364b316cacc1f602676/FLAGe6c5b5d13 [2019-11-23 22:07:02,845 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:07:02,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2019-11-23 22:07:02,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c6d81cd7/c082786013564364b316cacc1f602676/FLAGe6c5b5d13 [2019-11-23 22:07:03,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c6d81cd7/c082786013564364b316cacc1f602676 [2019-11-23 22:07:03,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:07:03,233 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:07:03,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:07:03,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:07:03,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:07:03,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f8c8d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03, skipping insertion in model container [2019-11-23 22:07:03,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:07:03,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:07:03,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:07:03,499 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:07:03,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:07:03,535 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:07:03,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03 WrapperNode [2019-11-23 22:07:03,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:07:03,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:07:03,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:07:03,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:07:03,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:07:03,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:07:03,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:07:03,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:07:03,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (1/1) ... [2019-11-23 22:07:03,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:07:03,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:07:03,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:07:03,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:07:03,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:07:03,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:07:03,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:07:03,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:07:03,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:07:03,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:07:03,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:07:03,954 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:07:03,954 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:07:03,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:07:03 BoogieIcfgContainer [2019-11-23 22:07:03,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:07:03,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:07:03,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:07:03,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:07:03,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:07:03" (1/3) ... [2019-11-23 22:07:03,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b62e35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:07:03, skipping insertion in model container [2019-11-23 22:07:03,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:03" (2/3) ... [2019-11-23 22:07:03,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b62e35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:07:03, skipping insertion in model container [2019-11-23 22:07:03,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:07:03" (3/3) ... [2019-11-23 22:07:03,963 INFO L109 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2019-11-23 22:07:03,973 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:07:03,979 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:07:03,990 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:07:04,010 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:07:04,010 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:07:04,010 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:07:04,011 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:07:04,011 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:07:04,011 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:07:04,011 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:07:04,011 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:07:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 22:07:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:07:04,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:04,029 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:07:04,030 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:04,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:04,034 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2019-11-23 22:07:04,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:04,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142262761] [2019-11-23 22:07:04,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142262761] [2019-11-23 22:07:04,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:07:04,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:07:04,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922669793] [2019-11-23 22:07:04,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:07:04,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:07:04,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:07:04,217 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-11-23 22:07:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:04,257 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2019-11-23 22:07:04,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:07:04,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 22:07:04,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:04,270 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:07:04,270 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:07:04,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:07:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:07:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-23 22:07:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:07:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-23 22:07:04,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-23 22:07:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:04,309 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-23 22:07:04,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:07:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-23 22:07:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:07:04,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:04,310 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:04,311 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2019-11-23 22:07:04,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:04,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362072906] [2019-11-23 22:07:04,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362072906] [2019-11-23 22:07:04,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629080852] [2019-11-23 22:07:04,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:04,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:07:04,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:04,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:07:04,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051340991] [2019-11-23 22:07:04,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:07:04,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:07:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:07:04,478 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2019-11-23 22:07:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:04,508 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-23 22:07:04,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:07:04,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-23 22:07:04,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:04,510 INFO L225 Difference]: With dead ends: 16 [2019-11-23 22:07:04,510 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:07:04,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:07:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:07:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-11-23 22:07:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:07:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-23 22:07:04,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-11-23 22:07:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:04,516 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-23 22:07:04,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:07:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-23 22:07:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:07:04,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:04,517 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:04,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:04,722 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2019-11-23 22:07:04,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:04,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265202855] [2019-11-23 22:07:04,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265202855] [2019-11-23 22:07:04,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212819151] [2019-11-23 22:07:04,818 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:04,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:04,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:04,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:07:04,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:04,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:04,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:07:04,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382646450] [2019-11-23 22:07:04,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:07:04,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:04,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:07:04,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:07:04,895 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2019-11-23 22:07:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:04,929 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-23 22:07:04,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:07:04,929 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-23 22:07:04,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:04,930 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:07:04,930 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:07:04,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:07:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:07:04,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-23 22:07:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 22:07:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-23 22:07:04,935 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-11-23 22:07:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:04,935 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-23 22:07:04,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:07:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-23 22:07:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:07:04,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:04,936 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:05,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,138 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:05,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:05,139 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2019-11-23 22:07:05,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:05,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123142738] [2019-11-23 22:07:05,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123142738] [2019-11-23 22:07:05,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457225480] [2019-11-23 22:07:05,210 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,260 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:07:05,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:05,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:07:05,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:05,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 22:07:05,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286301026] [2019-11-23 22:07:05,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:07:05,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:05,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:07:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:07:05,281 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2019-11-23 22:07:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:05,328 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-23 22:07:05,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:07:05,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-23 22:07:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:05,331 INFO L225 Difference]: With dead ends: 20 [2019-11-23 22:07:05,331 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:07:05,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:07:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:07:05,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 22:07:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:07:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-23 22:07:05,338 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-11-23 22:07:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:05,338 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-23 22:07:05,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:07:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-23 22:07:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:07:05,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:05,339 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:05,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,542 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:05,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2019-11-23 22:07:05,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:05,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631422139] [2019-11-23 22:07:05,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631422139] [2019-11-23 22:07:05,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706874417] [2019-11-23 22:07:05,638 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,689 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:05,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:05,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:07:05,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:05,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:05,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 22:07:05,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264643504] [2019-11-23 22:07:05,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:07:05,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:05,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:07:05,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:07:05,716 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2019-11-23 22:07:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:05,765 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-23 22:07:05,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:07:05,767 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-23 22:07:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:05,768 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:07:05,768 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:07:05,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:07:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:07:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 22:07:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:07:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:07:05,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-11-23 22:07:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:05,775 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:07:05,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:07:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:07:05,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:07:05,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:05,778 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:05,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:05,979 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2019-11-23 22:07:05,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:05,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208055749] [2019-11-23 22:07:05,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:06,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208055749] [2019-11-23 22:07:06,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968823682] [2019-11-23 22:07:06,076 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:06,129 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:07:06,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:06,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:07:06,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:06,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:06,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 22:07:06,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151525806] [2019-11-23 22:07:06,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:07:06,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:06,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:07:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:07:06,150 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-11-23 22:07:06,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:06,188 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-23 22:07:06,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:07:06,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-23 22:07:06,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:06,190 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:07:06,190 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:07:06,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:07:06,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:07:06,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 22:07:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:07:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-23 22:07:06,195 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2019-11-23 22:07:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:06,195 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-23 22:07:06,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:07:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-23 22:07:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:07:06,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:06,196 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:06,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:06,400 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2019-11-23 22:07:06,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:06,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213595095] [2019-11-23 22:07:06,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:06,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213595095] [2019-11-23 22:07:06,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477324260] [2019-11-23 22:07:06,505 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:06,562 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:07:06,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:06,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:07:06,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:06,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:06,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 22:07:06,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879750063] [2019-11-23 22:07:06,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:07:06,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:07:06,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:07:06,586 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2019-11-23 22:07:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:06,640 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-23 22:07:06,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:07:06,643 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-23 22:07:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:06,643 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:07:06,643 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:07:06,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:07:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:07:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 22:07:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:07:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-23 22:07:06,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2019-11-23 22:07:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:06,652 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-23 22:07:06,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:07:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-23 22:07:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:07:06,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:06,654 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:06,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:06,864 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:06,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:06,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2019-11-23 22:07:06,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:06,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162530157] [2019-11-23 22:07:06,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:06,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162530157] [2019-11-23 22:07:06,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155192883] [2019-11-23 22:07:06,987 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:07,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:07:07,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:07,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:07,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:07:07,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965535823] [2019-11-23 22:07:07,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:07:07,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:07:07,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:07:07,041 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2019-11-23 22:07:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:07,084 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-23 22:07:07,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:07:07,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2019-11-23 22:07:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:07,086 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:07:07,086 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:07:07,087 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:07:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:07:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-23 22:07:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:07:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-23 22:07:07,096 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2019-11-23 22:07:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:07,097 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-23 22:07:07,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:07:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-23 22:07:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:07:07,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:07,099 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:07,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:07,302 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:07,302 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2019-11-23 22:07:07,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:07,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026287397] [2019-11-23 22:07:07,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:07,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026287397] [2019-11-23 22:07:07,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351943293] [2019-11-23 22:07:07,418 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:07,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:07,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:07,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:07:07,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:07,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:07,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:07:07,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990674643] [2019-11-23 22:07:07,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:07:07,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:07,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:07:07,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:07:07,489 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2019-11-23 22:07:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:07,539 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-23 22:07:07,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:07:07,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-23 22:07:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:07,541 INFO L225 Difference]: With dead ends: 30 [2019-11-23 22:07:07,541 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:07:07,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:07:07,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:07:07,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-23 22:07:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:07:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-23 22:07:07,549 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2019-11-23 22:07:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:07,550 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-23 22:07:07,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:07:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-23 22:07:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:07:07,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:07,551 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:07,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:07,754 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2019-11-23 22:07:07,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:07,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604440582] [2019-11-23 22:07:07,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:07,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604440582] [2019-11-23 22:07:07,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076498996] [2019-11-23 22:07:07,928 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:08,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:07:08,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:08,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:07:08,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:08,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 22:07:08,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120491148] [2019-11-23 22:07:08,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:07:08,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:08,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:07:08,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:07:08,053 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2019-11-23 22:07:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:08,106 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-23 22:07:08,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:07:08,107 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2019-11-23 22:07:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:08,108 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:07:08,108 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:07:08,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:07:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:07:08,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 22:07:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:07:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-11-23 22:07:08,113 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2019-11-23 22:07:08,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:08,113 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-11-23 22:07:08,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:07:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-11-23 22:07:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:07:08,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:08,114 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:08,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:08,319 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2019-11-23 22:07:08,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:08,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753247509] [2019-11-23 22:07:08,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753247509] [2019-11-23 22:07:08,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493847428] [2019-11-23 22:07:08,437 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:08,488 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:08,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:08,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:07:08,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:08,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:07:08,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029292006] [2019-11-23 22:07:08,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:07:08,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:07:08,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:07:08,523 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2019-11-23 22:07:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:08,580 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-11-23 22:07:08,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:07:08,585 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2019-11-23 22:07:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:08,586 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:07:08,586 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:07:08,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:07:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:07:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-23 22:07:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:07:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-23 22:07:08,594 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2019-11-23 22:07:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:08,594 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-23 22:07:08,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:07:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-23 22:07:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:07:08,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:08,595 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:08,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:08,806 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:08,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:08,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2019-11-23 22:07:08,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:08,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102955197] [2019-11-23 22:07:08,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102955197] [2019-11-23 22:07:08,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064456964] [2019-11-23 22:07:08,956 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,050 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:07:09,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:09,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:07:09,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:09,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:09,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 22:07:09,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275269527] [2019-11-23 22:07:09,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:07:09,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:09,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:07:09,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:07:09,072 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2019-11-23 22:07:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:09,132 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-11-23 22:07:09,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:07:09,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-11-23 22:07:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:09,134 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:07:09,135 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:07:09,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:07:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:07:09,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-23 22:07:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:07:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-23 22:07:09,142 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2019-11-23 22:07:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:09,142 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-23 22:07:09,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:07:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-23 22:07:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:07:09,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:09,143 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:09,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,344 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:09,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2019-11-23 22:07:09,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:09,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628666793] [2019-11-23 22:07:09,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:09,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628666793] [2019-11-23 22:07:09,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455736769] [2019-11-23 22:07:09,517 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,654 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:07:09,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:09,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:07:09,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:09,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:09,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 22:07:09,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442435752] [2019-11-23 22:07:09,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:07:09,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:09,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:07:09,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:07:09,690 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2019-11-23 22:07:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:09,752 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-11-23 22:07:09,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:07:09,753 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2019-11-23 22:07:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:09,754 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:07:09,754 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:07:09,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:07:09,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:07:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 22:07:09,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:07:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-23 22:07:09,759 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2019-11-23 22:07:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:09,760 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-23 22:07:09,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:07:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-23 22:07:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:07:09,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:09,761 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:09,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,966 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2019-11-23 22:07:09,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:09,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376474293] [2019-11-23 22:07:09,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:10,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376474293] [2019-11-23 22:07:10,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058242823] [2019-11-23 22:07:10,153 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:07:10,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:10,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:10,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:07:10,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964769592] [2019-11-23 22:07:10,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:07:10,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:10,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:07:10,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:07:10,241 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2019-11-23 22:07:10,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:10,291 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-11-23 22:07:10,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:07:10,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2019-11-23 22:07:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:10,295 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:07:10,295 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:07:10,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:07:10,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:07:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-23 22:07:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:07:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-11-23 22:07:10,305 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2019-11-23 22:07:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:10,305 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-11-23 22:07:10,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:07:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-11-23 22:07:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:07:10,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,306 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:10,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,511 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:10,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2019-11-23 22:07:10,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:10,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367333392] [2019-11-23 22:07:10,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:10,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367333392] [2019-11-23 22:07:10,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388199357] [2019-11-23 22:07:10,753 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:10,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:10,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:07:10,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:10,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:10,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:07:10,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005445059] [2019-11-23 22:07:10,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:07:10,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:10,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:07:10,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:07:10,837 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2019-11-23 22:07:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:10,910 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-11-23 22:07:10,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:07:10,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2019-11-23 22:07:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:10,911 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:07:10,911 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:07:10,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:07:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:07:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-23 22:07:10,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:07:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-11-23 22:07:10,920 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2019-11-23 22:07:10,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:10,920 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-11-23 22:07:10,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:07:10,920 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-11-23 22:07:10,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 22:07:10,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,921 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:11,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,125 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:11,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2019-11-23 22:07:11,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:11,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585799421] [2019-11-23 22:07:11,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:11,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585799421] [2019-11-23 22:07:11,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727495029] [2019-11-23 22:07:11,299 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 22:07:11,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:11,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:07:11,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:11,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:11,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 22:07:11,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834930784] [2019-11-23 22:07:11,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:07:11,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:11,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:07:11,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:07:11,661 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2019-11-23 22:07:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:11,722 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-11-23 22:07:11,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:07:11,723 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2019-11-23 22:07:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:11,724 INFO L225 Difference]: With dead ends: 44 [2019-11-23 22:07:11,724 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:07:11,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:07:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:07:11,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-23 22:07:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:07:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-11-23 22:07:11,729 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2019-11-23 22:07:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:11,729 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-11-23 22:07:11,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:07:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-11-23 22:07:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:07:11,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:11,730 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:11,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,935 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2019-11-23 22:07:11,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:11,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166438870] [2019-11-23 22:07:11,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:12,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166438870] [2019-11-23 22:07:12,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542263993] [2019-11-23 22:07:12,146 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,202 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:12,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:12,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:07:12,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:12,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:12,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:07:12,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784177701] [2019-11-23 22:07:12,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:07:12,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:12,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:07:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:07:12,233 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2019-11-23 22:07:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:12,309 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-11-23 22:07:12,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:07:12,310 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2019-11-23 22:07:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:12,311 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:07:12,311 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:07:12,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:07:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:07:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-23 22:07:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:07:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-11-23 22:07:12,318 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2019-11-23 22:07:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:12,318 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-11-23 22:07:12,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:07:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-11-23 22:07:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:07:12,322 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:12,322 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:12,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,527 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:12,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:12,528 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2019-11-23 22:07:12,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:12,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152564946] [2019-11-23 22:07:12,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:12,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152564946] [2019-11-23 22:07:12,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985417667] [2019-11-23 22:07:12,758 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,950 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:07:12,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:12,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:07:12,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:12,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:12,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:07:12,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870150852] [2019-11-23 22:07:12,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:07:12,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:12,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:07:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:07:12,977 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2019-11-23 22:07:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:13,049 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-11-23 22:07:13,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:07:13,049 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2019-11-23 22:07:13,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:13,050 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:07:13,050 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 22:07:13,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:07:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 22:07:13,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-11-23 22:07:13,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 22:07:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-11-23 22:07:13,055 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2019-11-23 22:07:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:13,055 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-11-23 22:07:13,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:07:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-11-23 22:07:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:07:13,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:13,056 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:13,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,261 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:13,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2019-11-23 22:07:13,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:13,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926648639] [2019-11-23 22:07:13,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:13,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926648639] [2019-11-23 22:07:13,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495119292] [2019-11-23 22:07:13,473 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,882 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:07:13,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:13,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:07:13,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:13,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:13,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 22:07:13,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453360256] [2019-11-23 22:07:13,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:07:13,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:13,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:07:13,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:07:13,907 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2019-11-23 22:07:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:13,987 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-11-23 22:07:13,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:07:13,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2019-11-23 22:07:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:13,988 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:07:13,989 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:07:13,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:07:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:07:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-11-23 22:07:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:07:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-11-23 22:07:13,994 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2019-11-23 22:07:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:13,994 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-11-23 22:07:13,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:07:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-11-23 22:07:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 22:07:13,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:13,995 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:14,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:14,199 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:14,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:14,200 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2019-11-23 22:07:14,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:14,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951637396] [2019-11-23 22:07:14,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:14,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951637396] [2019-11-23 22:07:14,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314014676] [2019-11-23 22:07:14,436 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:14,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:07:14,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:14,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:14,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:07:14,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449139708] [2019-11-23 22:07:14,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:07:14,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:07:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:07:14,510 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2019-11-23 22:07:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:14,569 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-11-23 22:07:14,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:07:14,569 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2019-11-23 22:07:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:14,570 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:07:14,570 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 22:07:14,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:07:14,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 22:07:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-11-23 22:07:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:07:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-11-23 22:07:14,575 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2019-11-23 22:07:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:14,575 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-11-23 22:07:14,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:07:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-11-23 22:07:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:07:14,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:14,576 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:14,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:14,779 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:14,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2019-11-23 22:07:14,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:14,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114811640] [2019-11-23 22:07:14,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:15,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114811640] [2019-11-23 22:07:15,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619805438] [2019-11-23 22:07:15,047 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:15,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:15,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:15,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:07:15,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:15,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:15,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 22:07:15,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602772765] [2019-11-23 22:07:15,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:07:15,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:15,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:07:15,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:07:15,113 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2019-11-23 22:07:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:15,190 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-11-23 22:07:15,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:07:15,191 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2019-11-23 22:07:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:15,191 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:07:15,191 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 22:07:15,192 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:07:15,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 22:07:15,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-23 22:07:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 22:07:15,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-11-23 22:07:15,196 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2019-11-23 22:07:15,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:15,196 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-11-23 22:07:15,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:07:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-11-23 22:07:15,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 22:07:15,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:15,197 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:15,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:15,405 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:15,405 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2019-11-23 22:07:15,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:15,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208367542] [2019-11-23 22:07:15,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:15,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208367542] [2019-11-23 22:07:15,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315403800] [2019-11-23 22:07:15,704 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:17,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 22:07:17,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:17,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:07:17,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:17,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:17,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 22:07:17,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695329973] [2019-11-23 22:07:17,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:07:17,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:17,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:07:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:07:17,049 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2019-11-23 22:07:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:17,135 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-11-23 22:07:17,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:07:17,138 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2019-11-23 22:07:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:17,138 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:07:17,138 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 22:07:17,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:07:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 22:07:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-23 22:07:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:07:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-11-23 22:07:17,145 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2019-11-23 22:07:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:17,145 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-11-23 22:07:17,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:07:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-11-23 22:07:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:07:17,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:17,146 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:17,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:17,351 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:17,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:17,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2019-11-23 22:07:17,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:17,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611086613] [2019-11-23 22:07:17,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:17,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611086613] [2019-11-23 22:07:17,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019946278] [2019-11-23 22:07:17,610 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:17,659 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:17,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:17,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:07:17,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:17,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:17,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 22:07:17,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338225431] [2019-11-23 22:07:17,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:07:17,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:17,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:07:17,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:07:17,677 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2019-11-23 22:07:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:17,769 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-11-23 22:07:17,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:07:17,770 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2019-11-23 22:07:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:17,770 INFO L225 Difference]: With dead ends: 58 [2019-11-23 22:07:17,771 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:07:17,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:07:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:07:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-23 22:07:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:07:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-11-23 22:07:17,776 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2019-11-23 22:07:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:17,777 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-11-23 22:07:17,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:07:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-11-23 22:07:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:07:17,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:17,778 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:17,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:17,981 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:17,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2019-11-23 22:07:17,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:17,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326091148] [2019-11-23 22:07:17,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:18,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326091148] [2019-11-23 22:07:18,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179515509] [2019-11-23 22:07:18,282 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:18,657 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 22:07:18,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:18,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:07:18,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:18,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:18,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 22:07:18,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811943745] [2019-11-23 22:07:18,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:07:18,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:18,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:07:18,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:07:18,676 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2019-11-23 22:07:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:18,780 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-11-23 22:07:18,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:07:18,780 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2019-11-23 22:07:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:18,781 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:07:18,782 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:07:18,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:07:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:07:18,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-23 22:07:18,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:07:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-11-23 22:07:18,791 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2019-11-23 22:07:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:18,791 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-11-23 22:07:18,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:07:18,791 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-11-23 22:07:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:07:18,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:18,794 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:18,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:18,995 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:18,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2019-11-23 22:07:18,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:18,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75924539] [2019-11-23 22:07:18,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:19,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75924539] [2019-11-23 22:07:19,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857356024] [2019-11-23 22:07:19,318 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:23,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 22:07:23,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:23,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:07:23,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:23,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:23,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 22:07:23,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98247880] [2019-11-23 22:07:23,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:07:23,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:23,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:07:23,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:23,630 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2019-11-23 22:07:23,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:23,762 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-11-23 22:07:23,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:07:23,763 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2019-11-23 22:07:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:23,764 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:07:23,764 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 22:07:23,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:23,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 22:07:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-23 22:07:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 22:07:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-11-23 22:07:23,770 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2019-11-23 22:07:23,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:23,771 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-11-23 22:07:23,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:07:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-11-23 22:07:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:07:23,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:23,771 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:23,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:23,978 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:23,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:23,978 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2019-11-23 22:07:23,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:23,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064323915] [2019-11-23 22:07:23,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:24,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064323915] [2019-11-23 22:07:24,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453159819] [2019-11-23 22:07:24,375 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:24,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 22:07:24,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:24,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:24,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 22:07:24,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567621811] [2019-11-23 22:07:24,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:07:24,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:24,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:07:24,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:07:24,463 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2019-11-23 22:07:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:24,548 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-11-23 22:07:24,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:07:24,548 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2019-11-23 22:07:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:24,549 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:07:24,549 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 22:07:24,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:07:24,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 22:07:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-23 22:07:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:07:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-11-23 22:07:24,553 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2019-11-23 22:07:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:24,553 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-11-23 22:07:24,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:07:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-11-23 22:07:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:07:24,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:24,554 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:24,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:24,757 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:24,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2019-11-23 22:07:24,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:24,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034626648] [2019-11-23 22:07:24,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:25,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034626648] [2019-11-23 22:07:25,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776619975] [2019-11-23 22:07:25,193 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:25,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:25,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:25,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:07:25,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:25,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:25,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 22:07:25,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115860252] [2019-11-23 22:07:25,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:07:25,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:25,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:07:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:07:25,306 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2019-11-23 22:07:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:25,396 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-11-23 22:07:25,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:07:25,396 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2019-11-23 22:07:25,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:25,397 INFO L225 Difference]: With dead ends: 66 [2019-11-23 22:07:25,397 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:07:25,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:07:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:07:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-11-23 22:07:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:07:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-11-23 22:07:25,402 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2019-11-23 22:07:25,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:25,403 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-11-23 22:07:25,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:07:25,403 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-11-23 22:07:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:07:25,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:25,404 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:25,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:25,607 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:25,608 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2019-11-23 22:07:25,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:25,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138704409] [2019-11-23 22:07:25,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:25,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138704409] [2019-11-23 22:07:25,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049559912] [2019-11-23 22:07:25,962 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:31,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-23 22:07:31,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:31,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:07:31,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:31,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:31,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 22:07:31,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511008434] [2019-11-23 22:07:31,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:07:31,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:31,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:07:31,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:07:31,181 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2019-11-23 22:07:31,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:31,295 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-11-23 22:07:31,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:07:31,296 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2019-11-23 22:07:31,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:31,297 INFO L225 Difference]: With dead ends: 68 [2019-11-23 22:07:31,297 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:07:31,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:07:31,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:07:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-11-23 22:07:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 22:07:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-11-23 22:07:31,301 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2019-11-23 22:07:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:31,302 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-11-23 22:07:31,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:07:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-11-23 22:07:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 22:07:31,302 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:31,303 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:31,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:31,509 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2019-11-23 22:07:31,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:31,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265971454] [2019-11-23 22:07:31,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:32,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265971454] [2019-11-23 22:07:32,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954138744] [2019-11-23 22:07:32,019 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:32,092 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:32,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:32,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:07:32,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:32,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:32,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 22:07:32,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153162077] [2019-11-23 22:07:32,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:07:32,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:32,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:07:32,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:07:32,128 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2019-11-23 22:07:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:32,239 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-11-23 22:07:32,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:07:32,239 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2019-11-23 22:07:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:32,240 INFO L225 Difference]: With dead ends: 70 [2019-11-23 22:07:32,240 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 22:07:32,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:07:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 22:07:32,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2019-11-23 22:07:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 22:07:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-11-23 22:07:32,246 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2019-11-23 22:07:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:32,246 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-11-23 22:07:32,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:07:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-11-23 22:07:32,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:07:32,247 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:32,247 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:32,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:32,452 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:32,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:32,452 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2019-11-23 22:07:32,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:32,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435819544] [2019-11-23 22:07:32,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:32,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435819544] [2019-11-23 22:07:32,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796328714] [2019-11-23 22:07:32,877 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:34,418 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 22:07:34,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:34,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:07:34,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:34,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:34,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 22:07:34,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722887559] [2019-11-23 22:07:34,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:07:34,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:34,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:07:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:07:34,441 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2019-11-23 22:07:34,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:34,563 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-11-23 22:07:34,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:07:34,563 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2019-11-23 22:07:34,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:34,564 INFO L225 Difference]: With dead ends: 72 [2019-11-23 22:07:34,564 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 22:07:34,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:07:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 22:07:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-11-23 22:07:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 22:07:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-11-23 22:07:34,566 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2019-11-23 22:07:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:34,567 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-11-23 22:07:34,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:07:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-11-23 22:07:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 22:07:34,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:34,567 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:34,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:34,768 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2019-11-23 22:07:34,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:34,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124684681] [2019-11-23 22:07:34,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:35,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124684681] [2019-11-23 22:07:35,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870835129] [2019-11-23 22:07:35,170 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:50,507 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 22:07:50,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:50,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 22:07:50,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:50,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:50,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 22:07:50,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154020990] [2019-11-23 22:07:50,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:07:50,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:50,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:07:50,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:07:50,538 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2019-11-23 22:07:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:50,657 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-11-23 22:07:50,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:07:50,658 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2019-11-23 22:07:50,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:50,659 INFO L225 Difference]: With dead ends: 74 [2019-11-23 22:07:50,659 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 22:07:50,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:07:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 22:07:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-11-23 22:07:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 22:07:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-11-23 22:07:50,663 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2019-11-23 22:07:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:50,663 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-11-23 22:07:50,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:07:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-11-23 22:07:50,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 22:07:50,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:50,665 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:50,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:50,874 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:50,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2019-11-23 22:07:50,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:50,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536942572] [2019-11-23 22:07:50,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:51,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536942572] [2019-11-23 22:07:51,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284455906] [2019-11-23 22:07:51,338 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:51,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 22:07:51,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:51,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:51,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 22:07:51,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400865308] [2019-11-23 22:07:51,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:07:51,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:51,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:07:51,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:07:51,416 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2019-11-23 22:07:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:51,518 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-11-23 22:07:51,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:07:51,518 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2019-11-23 22:07:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:51,519 INFO L225 Difference]: With dead ends: 76 [2019-11-23 22:07:51,519 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 22:07:51,520 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:07:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 22:07:51,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-23 22:07:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:07:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-11-23 22:07:51,523 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2019-11-23 22:07:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:51,524 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-11-23 22:07:51,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:07:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-11-23 22:07:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 22:07:51,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:51,526 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:51,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:51,729 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:51,729 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2019-11-23 22:07:51,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:51,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98414192] [2019-11-23 22:07:51,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:52,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98414192] [2019-11-23 22:07:52,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530536029] [2019-11-23 22:07:52,258 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:52,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:52,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:52,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:07:52,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:52,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:52,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 22:07:52,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744007151] [2019-11-23 22:07:52,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:07:52,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:52,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:07:52,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:07:52,345 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2019-11-23 22:07:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:52,486 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-11-23 22:07:52,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:07:52,487 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2019-11-23 22:07:52,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:52,487 INFO L225 Difference]: With dead ends: 78 [2019-11-23 22:07:52,487 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:07:52,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:07:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:07:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-23 22:07:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 22:07:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-11-23 22:07:52,490 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2019-11-23 22:07:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:52,491 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-11-23 22:07:52,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:07:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-11-23 22:07:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 22:07:52,491 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:52,491 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:52,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:52,692 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:52,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:52,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2019-11-23 22:07:52,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:52,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300605550] [2019-11-23 22:07:52,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:53,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300605550] [2019-11-23 22:07:53,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806939709] [2019-11-23 22:07:53,393 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 [2019-11-23 22:08:05,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-11-23 22:08:05,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:05,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:08:05,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:05,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:05,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 22:08:05,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328422693] [2019-11-23 22:08:05,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:08:05,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:08:05,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:08:05,598 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2019-11-23 22:08:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:05,728 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-11-23 22:08:05,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:08:05,729 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2019-11-23 22:08:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:05,730 INFO L225 Difference]: With dead ends: 80 [2019-11-23 22:08:05,730 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 22:08:05,731 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:08:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 22:08:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-23 22:08:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 22:08:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-11-23 22:08:05,734 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2019-11-23 22:08:05,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:05,734 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-11-23 22:08:05,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:08:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-11-23 22:08:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 22:08:05,735 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:05,735 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:05,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:05,940 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:05,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2019-11-23 22:08:05,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:05,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030880209] [2019-11-23 22:08:05,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:06,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030880209] [2019-11-23 22:08:06,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767962388] [2019-11-23 22:08:06,480 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 [2019-11-23 22:08:06,546 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:06,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:06,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:08:06,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:06,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:06,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 22:08:06,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455149536] [2019-11-23 22:08:06,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:08:06,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:06,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:08:06,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:08:06,568 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2019-11-23 22:08:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:06,669 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-11-23 22:08:06,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:08:06,669 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2019-11-23 22:08:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:06,670 INFO L225 Difference]: With dead ends: 82 [2019-11-23 22:08:06,670 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 22:08:06,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:08:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 22:08:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-23 22:08:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:08:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-11-23 22:08:06,676 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2019-11-23 22:08:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:06,676 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-11-23 22:08:06,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:08:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-11-23 22:08:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:08:06,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:06,677 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:06,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:06,881 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:06,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:06,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2019-11-23 22:08:06,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:06,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837788661] [2019-11-23 22:08:06,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:07,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837788661] [2019-11-23 22:08:07,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183614230] [2019-11-23 22:08:07,421 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:08,373 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 22:08:08,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:08,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 22:08:08,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:08,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:08,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 22:08:08,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608454956] [2019-11-23 22:08:08,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:08:08,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:08,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:08:08,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:08:08,396 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2019-11-23 22:08:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:08,552 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-11-23 22:08:08,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:08:08,552 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2019-11-23 22:08:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:08,553 INFO L225 Difference]: With dead ends: 84 [2019-11-23 22:08:08,553 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 22:08:08,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:08:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 22:08:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-23 22:08:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 22:08:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-11-23 22:08:08,558 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2019-11-23 22:08:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:08,559 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-11-23 22:08:08,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:08:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-11-23 22:08:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-23 22:08:08,560 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:08,560 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:08,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:08,767 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:08,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:08,767 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2019-11-23 22:08:08,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:08,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360860144] [2019-11-23 22:08:08,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:09,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360860144] [2019-11-23 22:08:09,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351311537] [2019-11-23 22:08:09,560 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:43,386 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-11-23 22:08:43,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:43,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 22:08:43,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:43,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:43,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 22:08:43,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080030492] [2019-11-23 22:08:43,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:08:43,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:43,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:08:43,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:08:43,426 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2019-11-23 22:08:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:43,560 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-11-23 22:08:43,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:08:43,561 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2019-11-23 22:08:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:43,561 INFO L225 Difference]: With dead ends: 86 [2019-11-23 22:08:43,561 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 22:08:43,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:08:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 22:08:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-11-23 22:08:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 22:08:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-11-23 22:08:43,564 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2019-11-23 22:08:43,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:43,565 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-11-23 22:08:43,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:08:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-11-23 22:08:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 22:08:43,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:43,565 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:43,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:43,766 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:43,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2019-11-23 22:08:43,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:43,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704396936] [2019-11-23 22:08:43,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:44,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704396936] [2019-11-23 22:08:44,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131121422] [2019-11-23 22:08:44,548 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:44,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 22:08:44,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:44,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:44,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 22:08:44,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266940645] [2019-11-23 22:08:44,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:08:44,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:44,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:08:44,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:08:44,641 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2019-11-23 22:08:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:44,789 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-11-23 22:08:44,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:08:44,789 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2019-11-23 22:08:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:44,790 INFO L225 Difference]: With dead ends: 88 [2019-11-23 22:08:44,790 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:08:44,790 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:08:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:08:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-11-23 22:08:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 22:08:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-11-23 22:08:44,795 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2019-11-23 22:08:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:44,795 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-11-23 22:08:44,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:08:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-11-23 22:08:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 22:08:44,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:44,796 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:44,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:44,999 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:45,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2019-11-23 22:08:45,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:45,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312936896] [2019-11-23 22:08:45,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:45,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312936896] [2019-11-23 22:08:45,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71384615] [2019-11-23 22:08:45,646 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:45,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:08:45,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:45,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:08:45,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:45,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:45,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 22:08:45,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82755088] [2019-11-23 22:08:45,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:08:45,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:45,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:08:45,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:08:45,747 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2019-11-23 22:08:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:45,903 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-11-23 22:08:45,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:08:45,903 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2019-11-23 22:08:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:45,904 INFO L225 Difference]: With dead ends: 90 [2019-11-23 22:08:45,904 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 22:08:45,906 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:08:45,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 22:08:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-11-23 22:08:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 22:08:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-11-23 22:08:45,909 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2019-11-23 22:08:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:45,910 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-11-23 22:08:45,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:08:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-11-23 22:08:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 22:08:45,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:45,910 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:46,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:46,114 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:46,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2019-11-23 22:08:46,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:46,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046164431] [2019-11-23 22:08:46,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:47,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046164431] [2019-11-23 22:08:47,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436926459] [2019-11-23 22:08:47,099 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true