/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_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:07:08,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:07:08,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:07:08,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:07:08,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:07:08,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:07:08,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:07:08,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:07:08,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:07:08,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:07:08,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:07:08,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:07:08,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:07:08,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:07:08,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:07:08,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:07:08,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:07:08,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:07:08,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:07:08,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:07:08,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:07:08,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:07:08,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:07:08,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:07:08,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:07:08,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:07:08,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:07:08,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:07:08,166 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 22:07:08,199 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:07:08,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:07:08,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:07:08,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:07:08,203 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:07:08,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:07:08,207 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:07:08,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:07:08,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:07:08,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:07:08,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:07:08,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:07:08,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:07:08,208 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:07:08,209 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:07:08,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:07:08,211 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:07:08,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:07:08,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:07:08,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:07:08,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:07:08,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:07:08,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:07:08,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:07:08,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:07:08,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:07:08,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:07:08,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:07:08,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:07:08,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:07:08,516 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:07:08,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:07:08,535 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:07:08,537 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:07:08,537 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:07:08,538 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2019-11-23 22:07:08,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93270a857/575d2bb955db47e6b32c9c8ca82fad70/FLAGd68b7a25b [2019-11-23 22:07:09,055 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:07:09,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2019-11-23 22:07:09,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93270a857/575d2bb955db47e6b32c9c8ca82fad70/FLAGd68b7a25b [2019-11-23 22:07:09,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93270a857/575d2bb955db47e6b32c9c8ca82fad70 [2019-11-23 22:07:09,492 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:07:09,494 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:07:09,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:07:09,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:07:09,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:07:09,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:09,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47c43521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09, skipping insertion in model container [2019-11-23 22:07:09,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:09,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:07:09,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:07:09,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:07:09,771 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:07:09,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:07:09,819 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:07:09,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09 WrapperNode [2019-11-23 22:07:09,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:07:09,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:07:09,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:07:09,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:07:09,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:09,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:09,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:07:09,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:07:09,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:07:09,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:07:09,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:09,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:09,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:09,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:10,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:10,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:10,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (1/1) ... [2019-11-23 22:07:10,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:07:10,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:07:10,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:07:10,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:07:10,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (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 22:07:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:07:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:07:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:07:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:07:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:07:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:07:10,271 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:07:10,272 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 22:07:10,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:07:10 BoogieIcfgContainer [2019-11-23 22:07:10,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:07:10,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:07:10,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:07:10,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:07:10,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:07:09" (1/3) ... [2019-11-23 22:07:10,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22de070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:07:10, skipping insertion in model container [2019-11-23 22:07:10,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:09" (2/3) ... [2019-11-23 22:07:10,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22de070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:07:10, skipping insertion in model container [2019-11-23 22:07:10,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:07:10" (3/3) ... [2019-11-23 22:07:10,281 INFO L109 eAbstractionObserver]: Analyzing ICFG array_4.i [2019-11-23 22:07:10,295 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:07:10,303 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:07:10,321 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:07:10,368 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:07:10,369 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:07:10,369 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:07:10,369 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:07:10,369 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:07:10,370 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:07:10,370 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:07:10,370 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:07:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 22:07:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:07:10,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,401 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:10,401 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:10,407 INFO L82 PathProgramCache]: Analyzing trace with hash 212257263, now seen corresponding path program 1 times [2019-11-23 22:07:10,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:10,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113626706] [2019-11-23 22:07:10,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,552 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 22:07:10,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113626706] [2019-11-23 22:07:10,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:07:10,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:07:10,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276149635] [2019-11-23 22:07:10,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:07:10,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:10,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:07:10,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:07:10,575 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2019-11-23 22:07:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:10,588 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2019-11-23 22:07:10,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:07:10,590 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 22:07:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:10,598 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:07:10,598 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:07:10,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:07:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:07:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 22:07:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:07:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 22:07:10,629 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2019-11-23 22:07:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:10,630 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 22:07:10,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:07:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 22:07:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:07:10,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,631 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:10,632 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:10,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2018512365, now seen corresponding path program 1 times [2019-11-23 22:07:10,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:10,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609143959] [2019-11-23 22:07:10,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,681 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 22:07:10,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609143959] [2019-11-23 22:07:10,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:07:10,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:07:10,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344227565] [2019-11-23 22:07:10,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:07:10,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:10,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:07:10,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:07:10,686 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2019-11-23 22:07:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:10,745 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-23 22:07:10,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:07:10,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 22:07:10,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:10,747 INFO L225 Difference]: With dead ends: 29 [2019-11-23 22:07:10,747 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:07:10,748 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 22:07:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:07:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2019-11-23 22:07:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 22:07:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-23 22:07:10,752 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2019-11-23 22:07:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:10,753 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-23 22:07:10,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:07:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-23 22:07:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:07:10,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,754 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:10,754 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:10,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1562582865, now seen corresponding path program 1 times [2019-11-23 22:07:10,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:10,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969618926] [2019-11-23 22:07:10,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:07:10,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969618926] [2019-11-23 22:07:10,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:07:10,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:07:10,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289374578] [2019-11-23 22:07:10,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:07:10,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:10,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:07:10,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:07:10,831 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2019-11-23 22:07:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:10,890 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-23 22:07:10,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:07:10,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 22:07:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:10,892 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:07:10,892 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:07:10,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:07:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:07:10,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-11-23 22:07:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:07:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-23 22:07:10,897 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2019-11-23 22:07:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:10,898 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-23 22:07:10,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:07:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-23 22:07:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:07:10,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,899 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:10,900 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:10,900 INFO L82 PathProgramCache]: Analyzing trace with hash -597185067, now seen corresponding path program 1 times [2019-11-23 22:07:10,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:10,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86994895] [2019-11-23 22:07:10,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:07:10,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86994895] [2019-11-23 22:07:10,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986143665] [2019-11-23 22:07:10,960 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 22:07:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:11,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:07:11,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:07:11,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:11,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-23 22:07:11,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572369529] [2019-11-23 22:07:11,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:07:11,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:11,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:07:11,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:07:11,052 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2019-11-23 22:07:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:11,117 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-11-23 22:07:11,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:07:11,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-23 22:07:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:11,121 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:07:11,121 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:07:11,122 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:07:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:07:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-11-23 22:07:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:07:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-23 22:07:11,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2019-11-23 22:07:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:11,129 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-23 22:07:11,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:07:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-23 22:07:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:07:11,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:11,130 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:11,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,332 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:11,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash -906661873, now seen corresponding path program 2 times [2019-11-23 22:07:11,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:11,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632129125] [2019-11-23 22:07:11,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:07:11,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632129125] [2019-11-23 22:07:11,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022476907] [2019-11-23 22:07:11,435 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 22:07:11,477 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:11,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:11,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:07:11,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:07:11,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:11,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-23 22:07:11,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978572221] [2019-11-23 22:07:11,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:07:11,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:11,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:07:11,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:07:11,501 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2019-11-23 22:07:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:11,584 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-11-23 22:07:11,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:07:11,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-23 22:07:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:11,587 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:07:11,587 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:07:11,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:07:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:07:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-11-23 22:07:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:07:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-23 22:07:11,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2019-11-23 22:07:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:11,598 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-23 22:07:11,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:07:11,598 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-23 22:07:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:07:11,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:11,599 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:11,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,800 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash 413041625, now seen corresponding path program 3 times [2019-11-23 22:07:11,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:11,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254008161] [2019-11-23 22:07:11,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:07:11,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254008161] [2019-11-23 22:07:11,888 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124239639] [2019-11-23 22:07:11,889 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 22:07:11,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:07:11,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:11,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:07:11,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:07:11,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:11,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-23 22:07:11,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067284300] [2019-11-23 22:07:11,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:07:11,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:07:11,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:07:11,967 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2019-11-23 22:07:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:12,041 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2019-11-23 22:07:12,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:07:12,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-23 22:07:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:12,042 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:07:12,043 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:07:12,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:07:12,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:07:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-23 22:07:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:07:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-23 22:07:12,049 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2019-11-23 22:07:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:12,049 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-23 22:07:12,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:07:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-23 22:07:12,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:07:12,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:12,050 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:12,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,254 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:12,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:12,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1713031669, now seen corresponding path program 4 times [2019-11-23 22:07:12,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:12,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619316137] [2019-11-23 22:07:12,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:07:12,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619316137] [2019-11-23 22:07:12,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778431782] [2019-11-23 22:07:12,376 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 22:07:12,415 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:12,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:12,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:07:12,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 22:07:12,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:12,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-23 22:07:12,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937611235] [2019-11-23 22:07:12,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:07:12,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:12,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:07:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:07:12,433 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2019-11-23 22:07:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:12,512 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2019-11-23 22:07:12,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:07:12,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-11-23 22:07:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:12,514 INFO L225 Difference]: With dead ends: 58 [2019-11-23 22:07:12,514 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:07:12,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:07:12,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:07:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-11-23 22:07:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:07:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-23 22:07:12,521 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2019-11-23 22:07:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:12,521 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-23 22:07:12,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:07:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-23 22:07:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:07:12,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:12,522 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:12,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,734 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:12,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1650799069, now seen corresponding path program 5 times [2019-11-23 22:07:12,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:12,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183707809] [2019-11-23 22:07:12,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 22:07:12,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183707809] [2019-11-23 22:07:12,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615088708] [2019-11-23 22:07:12,848 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 22:07:12,898 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:07:12,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:12,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:07:12,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 22:07:12,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:12,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-23 22:07:12,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534159574] [2019-11-23 22:07:12,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:07:12,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:07:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:07:12,932 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2019-11-23 22:07:13,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:13,018 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2019-11-23 22:07:13,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:07:13,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-23 22:07:13,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:13,022 INFO L225 Difference]: With dead ends: 66 [2019-11-23 22:07:13,023 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:07:13,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:07:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:07:13,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-11-23 22:07:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 22:07:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-23 22:07:13,038 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2019-11-23 22:07:13,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:13,039 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-23 22:07:13,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:07:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-23 22:07:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 22:07:13,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:13,040 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:13,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,242 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:13,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash -942996473, now seen corresponding path program 6 times [2019-11-23 22:07:13,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:13,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195724307] [2019-11-23 22:07:13,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 22:07:13,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195724307] [2019-11-23 22:07:13,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916531219] [2019-11-23 22:07:13,356 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 22:07:13,422 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:07:13,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:13,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:07:13,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:07:13,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:13,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-23 22:07:13,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566957588] [2019-11-23 22:07:13,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:07:13,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:13,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:07:13,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:07:13,453 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 11 states. [2019-11-23 22:07:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:13,539 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2019-11-23 22:07:13,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:07:13,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-11-23 22:07:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:13,543 INFO L225 Difference]: With dead ends: 74 [2019-11-23 22:07:13,543 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 22:07:13,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:07:13,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 22:07:13,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-23 22:07:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:07:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-11-23 22:07:13,549 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2019-11-23 22:07:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:13,550 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-11-23 22:07:13,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:07:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-11-23 22:07:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 22:07:13,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:13,551 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:13,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,756 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:13,757 INFO L82 PathProgramCache]: Analyzing trace with hash -865077279, now seen corresponding path program 7 times [2019-11-23 22:07:13,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:13,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537667500] [2019-11-23 22:07:13,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:07:13,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537667500] [2019-11-23 22:07:13,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087835805] [2019-11-23 22:07:13,883 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 22:07:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:13,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:07:13,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 22:07:13,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:13,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-23 22:07:13,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616941774] [2019-11-23 22:07:13,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:07:13,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:13,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:07:13,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:07:13,974 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 12 states. [2019-11-23 22:07:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:14,073 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2019-11-23 22:07:14,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:07:14,074 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2019-11-23 22:07:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:14,074 INFO L225 Difference]: With dead ends: 82 [2019-11-23 22:07:14,075 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 22:07:14,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:07:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 22:07:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-11-23 22:07:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:07:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-23 22:07:14,082 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2019-11-23 22:07:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:14,082 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-23 22:07:14,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:07:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-23 22:07:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:07:14,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:14,088 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:14,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:14,293 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:14,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:14,293 INFO L82 PathProgramCache]: Analyzing trace with hash -51209725, now seen corresponding path program 8 times [2019-11-23 22:07:14,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:14,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000428785] [2019-11-23 22:07:14,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:07:14,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000428785] [2019-11-23 22:07:14,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148959558] [2019-11-23 22:07:14,454 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 22:07:14,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:14,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:14,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:07:14,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:07:14,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:14,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-23 22:07:14,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427797343] [2019-11-23 22:07:14,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:07:14,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:14,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:07:14,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:07:14,519 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 13 states. [2019-11-23 22:07:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:14,627 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2019-11-23 22:07:14,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:07:14,627 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-11-23 22:07:14,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:14,628 INFO L225 Difference]: With dead ends: 90 [2019-11-23 22:07:14,628 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 22:07:14,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:07:14,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 22:07:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-11-23 22:07:14,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:07:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2019-11-23 22:07:14,642 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2019-11-23 22:07:14,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:14,642 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2019-11-23 22:07:14,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:07:14,642 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2019-11-23 22:07:14,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:07:14,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:14,646 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:14,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:14,857 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:14,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:14,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1383273957, now seen corresponding path program 9 times [2019-11-23 22:07:14,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:14,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197322918] [2019-11-23 22:07:14,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 22:07:15,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197322918] [2019-11-23 22:07:15,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245012173] [2019-11-23 22:07:15,055 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 22:07:15,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:07:15,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:15,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:07:15,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 22:07:15,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:15,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-23 22:07:15,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488242071] [2019-11-23 22:07:15,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:07:15,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:15,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:07:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:07:15,233 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 14 states. [2019-11-23 22:07:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:15,351 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2019-11-23 22:07:15,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:07:15,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-11-23 22:07:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:15,353 INFO L225 Difference]: With dead ends: 98 [2019-11-23 22:07:15,353 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:07:15,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:07:15,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:07:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-11-23 22:07:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 22:07:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2019-11-23 22:07:15,359 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2019-11-23 22:07:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:15,360 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2019-11-23 22:07:15,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:07:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2019-11-23 22:07:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 22:07:15,361 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:15,361 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:15,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:15,562 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:15,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:15,562 INFO L82 PathProgramCache]: Analyzing trace with hash 933738495, now seen corresponding path program 10 times [2019-11-23 22:07:15,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:15,563 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148451394] [2019-11-23 22:07:15,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:07:15,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148451394] [2019-11-23 22:07:15,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394260004] [2019-11-23 22:07:15,744 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 22:07:15,800 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:15,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:15,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:07:15,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-23 22:07:15,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:15,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-23 22:07:15,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345192710] [2019-11-23 22:07:15,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:07:15,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:15,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:07:15,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:07:15,834 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2019-11-23 22:07:15,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:15,925 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2019-11-23 22:07:15,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:07:15,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2019-11-23 22:07:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:15,926 INFO L225 Difference]: With dead ends: 106 [2019-11-23 22:07:15,926 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:07:15,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:07:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:07:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-23 22:07:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 22:07:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-23 22:07:15,932 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2019-11-23 22:07:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:15,933 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-23 22:07:15,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:07:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-23 22:07:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:07:15,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:15,934 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:16,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:16,138 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:16,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1562561513, now seen corresponding path program 11 times [2019-11-23 22:07:16,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:16,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267441963] [2019-11-23 22:07:16,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 22:07:16,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267441963] [2019-11-23 22:07:16,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745910980] [2019-11-23 22:07:16,302 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 22:07:16,399 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:07:16,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:16,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:07:16,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-23 22:07:16,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:16,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-23 22:07:16,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41743232] [2019-11-23 22:07:16,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:07:16,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:16,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:07:16,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:07:16,431 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 16 states. [2019-11-23 22:07:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:16,547 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2019-11-23 22:07:16,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:07:16,547 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2019-11-23 22:07:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:16,548 INFO L225 Difference]: With dead ends: 114 [2019-11-23 22:07:16,548 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 22:07:16,549 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:07:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 22:07:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 22:07:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 22:07:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2019-11-23 22:07:16,555 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2019-11-23 22:07:16,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:16,556 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2019-11-23 22:07:16,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:07:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2019-11-23 22:07:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 22:07:16,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:16,557 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:16,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:16,765 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:16,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1194728955, now seen corresponding path program 12 times [2019-11-23 22:07:16,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:16,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136003630] [2019-11-23 22:07:16,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 22:07:16,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136003630] [2019-11-23 22:07:16,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160720974] [2019-11-23 22:07:16,941 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 22:07:17,189 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:07:17,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:17,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:07:17,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-23 22:07:17,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:17,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-11-23 22:07:17,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517502430] [2019-11-23 22:07:17,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:07:17,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:17,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:07:17,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:07:17,213 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 17 states. [2019-11-23 22:07:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:17,322 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2019-11-23 22:07:17,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:07:17,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2019-11-23 22:07:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:17,323 INFO L225 Difference]: With dead ends: 122 [2019-11-23 22:07:17,323 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 22:07:17,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:07:17,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 22:07:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2019-11-23 22:07:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 22:07:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2019-11-23 22:07:17,329 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2019-11-23 22:07:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:17,330 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2019-11-23 22:07:17,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:07:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2019-11-23 22:07:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 22:07:17,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:17,331 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:17,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:17,535 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:17,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1177770477, now seen corresponding path program 13 times [2019-11-23 22:07:17,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:17,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743476512] [2019-11-23 22:07:17,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 22:07:17,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743476512] [2019-11-23 22:07:17,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212876587] [2019-11-23 22:07:17,740 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 22:07:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:17,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:07:17,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-23 22:07:17,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:17,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-23 22:07:17,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887062519] [2019-11-23 22:07:17,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:07:17,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:17,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:07:17,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:07:17,856 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 18 states. [2019-11-23 22:07:17,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:17,949 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2019-11-23 22:07:17,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:07:17,949 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2019-11-23 22:07:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:17,950 INFO L225 Difference]: With dead ends: 130 [2019-11-23 22:07:17,950 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 22:07:17,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:07:17,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 22:07:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2019-11-23 22:07:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:07:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-11-23 22:07:17,956 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2019-11-23 22:07:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:17,956 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-11-23 22:07:17,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:07:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-11-23 22:07:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:07:17,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:17,957 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:18,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:18,161 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:18,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1206488055, now seen corresponding path program 14 times [2019-11-23 22:07:18,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:18,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673072437] [2019-11-23 22:07:18,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:07:18,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673072437] [2019-11-23 22:07:18,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850750683] [2019-11-23 22:07:18,355 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 22:07:18,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:18,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:18,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:07:18,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-23 22:07:18,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:18,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-23 22:07:18,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173224248] [2019-11-23 22:07:18,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:07:18,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:18,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:07:18,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:07:18,433 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 19 states. [2019-11-23 22:07:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:18,577 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2019-11-23 22:07:18,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:07:18,578 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2019-11-23 22:07:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:18,579 INFO L225 Difference]: With dead ends: 138 [2019-11-23 22:07:18,580 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 22:07:18,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=221, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:07:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 22:07:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2019-11-23 22:07:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 22:07:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2019-11-23 22:07:18,585 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 79 [2019-11-23 22:07:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:18,586 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2019-11-23 22:07:18,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:07:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2019-11-23 22:07:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 22:07:18,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:18,587 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:18,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:18,790 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:18,791 INFO L82 PathProgramCache]: Analyzing trace with hash -598147087, now seen corresponding path program 15 times [2019-11-23 22:07:18,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:18,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872007729] [2019-11-23 22:07:18,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 22:07:18,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872007729] [2019-11-23 22:07:18,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845183706] [2019-11-23 22:07:18,985 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 22:07:19,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 22:07:19,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:19,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:07:19,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-23 22:07:19,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:19,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-11-23 22:07:19,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736325531] [2019-11-23 22:07:19,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:07:19,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:19,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:07:19,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:07:19,379 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 20 states. [2019-11-23 22:07:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:19,516 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2019-11-23 22:07:19,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:07:19,517 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 84 [2019-11-23 22:07:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:19,517 INFO L225 Difference]: With dead ends: 146 [2019-11-23 22:07:19,517 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 22:07:19,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=243, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:07:19,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 22:07:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2019-11-23 22:07:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-23 22:07:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2019-11-23 22:07:19,522 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 84 [2019-11-23 22:07:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:19,523 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2019-11-23 22:07:19,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:07:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2019-11-23 22:07:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 22:07:19,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:19,524 INFO L410 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:19,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:19,728 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:19,729 INFO L82 PathProgramCache]: Analyzing trace with hash 520995315, now seen corresponding path program 16 times [2019-11-23 22:07:19,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:19,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977145285] [2019-11-23 22:07:19,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:07:19,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977145285] [2019-11-23 22:07:19,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664194266] [2019-11-23 22:07:19,985 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 22:07:20,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:20,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:20,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:07:20,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 22:07:20,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:20,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-23 22:07:20,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846325172] [2019-11-23 22:07:20,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:07:20,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:20,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:07:20,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:07:20,064 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 21 states. [2019-11-23 22:07:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:20,200 INFO L93 Difference]: Finished difference Result 154 states and 157 transitions. [2019-11-23 22:07:20,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:07:20,201 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2019-11-23 22:07:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:20,202 INFO L225 Difference]: With dead ends: 154 [2019-11-23 22:07:20,202 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 22:07:20,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=266, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:07:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 22:07:20,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-23 22:07:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 22:07:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2019-11-23 22:07:20,207 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 89 [2019-11-23 22:07:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:20,208 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2019-11-23 22:07:20,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:07:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2019-11-23 22:07:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 22:07:20,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:20,208 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:20,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:20,417 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:20,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:20,418 INFO L82 PathProgramCache]: Analyzing trace with hash -414712331, now seen corresponding path program 17 times [2019-11-23 22:07:20,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:20,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981829359] [2019-11-23 22:07:20,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 22:07:20,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981829359] [2019-11-23 22:07:20,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108451337] [2019-11-23 22:07:20,635 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 22:07:20,809 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:07:20,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:20,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:07:20,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-23 22:07:20,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:20,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-11-23 22:07:20,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74747682] [2019-11-23 22:07:20,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:07:20,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:20,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:07:20,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:07:20,830 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 22 states. [2019-11-23 22:07:20,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:20,989 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2019-11-23 22:07:20,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:07:20,989 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 94 [2019-11-23 22:07:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:20,990 INFO L225 Difference]: With dead ends: 162 [2019-11-23 22:07:20,990 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 22:07:20,990 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=290, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:07:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 22:07:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2019-11-23 22:07:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 22:07:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2019-11-23 22:07:20,993 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 94 [2019-11-23 22:07:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:20,993 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2019-11-23 22:07:20,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:07:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2019-11-23 22:07:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 22:07:20,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:20,994 INFO L410 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:21,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:21,195 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:21,196 INFO L82 PathProgramCache]: Analyzing trace with hash -152141841, now seen corresponding path program 18 times [2019-11-23 22:07:21,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:21,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299777136] [2019-11-23 22:07:21,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:07:21,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299777136] [2019-11-23 22:07:21,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100473058] [2019-11-23 22:07:21,457 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 22:07:22,658 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:07:22,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:22,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:07:22,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-23 22:07:22,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:22,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-11-23 22:07:22,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381829823] [2019-11-23 22:07:22,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:07:22,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:22,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:07:22,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:07:22,694 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 23 states. [2019-11-23 22:07:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:22,835 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2019-11-23 22:07:22,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:07:22,835 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2019-11-23 22:07:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:22,836 INFO L225 Difference]: With dead ends: 170 [2019-11-23 22:07:22,836 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 22:07:22,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=315, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:07:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 22:07:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-11-23 22:07:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 22:07:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2019-11-23 22:07:22,839 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 99 [2019-11-23 22:07:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:22,841 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2019-11-23 22:07:22,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:07:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2019-11-23 22:07:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 22:07:22,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:22,842 INFO L410 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:23,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:23,048 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:23,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:23,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1414228999, now seen corresponding path program 19 times [2019-11-23 22:07:23,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:23,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917583396] [2019-11-23 22:07:23,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-23 22:07:23,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917583396] [2019-11-23 22:07:23,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339753656] [2019-11-23 22:07:23,332 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 22:07:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:23,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:07:23,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-23 22:07:23,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:23,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-23 22:07:23,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270747624] [2019-11-23 22:07:23,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:07:23,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:07:23,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:07:23,417 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 24 states. [2019-11-23 22:07:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:23,601 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2019-11-23 22:07:23,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:07:23,603 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 104 [2019-11-23 22:07:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:23,604 INFO L225 Difference]: With dead ends: 178 [2019-11-23 22:07:23,604 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 22:07:23,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:07:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 22:07:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2019-11-23 22:07:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 22:07:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2019-11-23 22:07:23,608 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 104 [2019-11-23 22:07:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:23,609 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2019-11-23 22:07:23,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:07:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2019-11-23 22:07:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 22:07:23,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:23,610 INFO L410 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:23,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:23,814 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:23,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1160280597, now seen corresponding path program 20 times [2019-11-23 22:07:23,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:23,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47218742] [2019-11-23 22:07:23,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:07:24,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47218742] [2019-11-23 22:07:24,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738220513] [2019-11-23 22:07:24,099 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 22:07:24,181 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:24,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:24,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:07:24,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-23 22:07:24,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:24,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-23 22:07:24,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771610020] [2019-11-23 22:07:24,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:07:24,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:24,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:07:24,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:07:24,209 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 25 states. [2019-11-23 22:07:24,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:24,362 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2019-11-23 22:07:24,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:07:24,362 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 109 [2019-11-23 22:07:24,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:24,364 INFO L225 Difference]: With dead ends: 186 [2019-11-23 22:07:24,364 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 22:07:24,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:07:24,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 22:07:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-11-23 22:07:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-23 22:07:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2019-11-23 22:07:24,370 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 109 [2019-11-23 22:07:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:24,370 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2019-11-23 22:07:24,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:07:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2019-11-23 22:07:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-23 22:07:24,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:24,371 INFO L410 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:24,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:24,575 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:24,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1867710973, now seen corresponding path program 21 times [2019-11-23 22:07:24,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:24,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333167742] [2019-11-23 22:07:24,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 22:07:24,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333167742] [2019-11-23 22:07:24,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364280637] [2019-11-23 22:07:24,842 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 22:07:26,287 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 22:07:26,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:26,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:07:26,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:26,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:07:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 22:07:26,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:26,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2019-11-23 22:07:26,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76407346] [2019-11-23 22:07:26,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:07:26,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:26,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:07:26,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:07:26,369 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 27 states. [2019-11-23 22:07:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:26,599 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2019-11-23 22:07:26,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:07:26,600 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 114 [2019-11-23 22:07:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:26,601 INFO L225 Difference]: With dead ends: 194 [2019-11-23 22:07:26,601 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 22:07:26,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:26,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 22:07:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2019-11-23 22:07:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 22:07:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2019-11-23 22:07:26,606 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 114 [2019-11-23 22:07:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:26,606 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2019-11-23 22:07:26,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:07:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2019-11-23 22:07:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 22:07:26,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:26,608 INFO L410 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:26,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:26,814 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1827367961, now seen corresponding path program 22 times [2019-11-23 22:07:26,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:26,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235388378] [2019-11-23 22:07:26,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 22:07:27,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235388378] [2019-11-23 22:07:27,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602718119] [2019-11-23 22:07:27,180 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 22:07:27,281 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:27,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:27,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:07:27,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-11-23 22:07:27,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:27,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-23 22:07:27,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200370213] [2019-11-23 22:07:27,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:07:27,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:07:27,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:07:27,338 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 27 states. [2019-11-23 22:07:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:27,512 INFO L93 Difference]: Finished difference Result 202 states and 205 transitions. [2019-11-23 22:07:27,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:07:27,523 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 119 [2019-11-23 22:07:27,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:27,524 INFO L225 Difference]: With dead ends: 202 [2019-11-23 22:07:27,524 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 22:07:27,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:27,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 22:07:27,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-11-23 22:07:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 22:07:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2019-11-23 22:07:27,528 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 119 [2019-11-23 22:07:27,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:27,529 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2019-11-23 22:07:27,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:07:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2019-11-23 22:07:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 22:07:27,530 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:27,530 INFO L410 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:27,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:27,733 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:27,734 INFO L82 PathProgramCache]: Analyzing trace with hash -52983807, now seen corresponding path program 23 times [2019-11-23 22:07:27,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:27,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781764976] [2019-11-23 22:07:27,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 22:07:28,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781764976] [2019-11-23 22:07:28,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761977121] [2019-11-23 22:07:28,297 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 22:07:28,765 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 22:07:28,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:28,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:07:28,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-11-23 22:07:28,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:28,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-11-23 22:07:28,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456889464] [2019-11-23 22:07:28,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:07:28,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:28,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:07:28,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:28,807 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 28 states. [2019-11-23 22:07:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:28,984 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2019-11-23 22:07:28,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:07:28,984 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 124 [2019-11-23 22:07:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:28,985 INFO L225 Difference]: With dead ends: 210 [2019-11-23 22:07:28,986 INFO L226 Difference]: Without dead ends: 132 [2019-11-23 22:07:28,986 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=357, Invalid=455, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:07:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-23 22:07:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2019-11-23 22:07:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-23 22:07:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2019-11-23 22:07:28,990 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 124 [2019-11-23 22:07:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:28,991 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2019-11-23 22:07:28,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:07:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2019-11-23 22:07:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 22:07:28,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:28,992 INFO L410 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:29,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:29,197 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:29,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1626434019, now seen corresponding path program 24 times [2019-11-23 22:07:29,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:29,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370032431] [2019-11-23 22:07:29,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-23 22:07:29,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370032431] [2019-11-23 22:07:29,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557231571] [2019-11-23 22:07:29,657 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 22:07:32,991 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 22:07:32,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:32,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:07:33,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-11-23 22:07:33,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:33,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-11-23 22:07:33,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078688416] [2019-11-23 22:07:33,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:07:33,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:07:33,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:07:33,032 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 29 states. [2019-11-23 22:07:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:33,200 INFO L93 Difference]: Finished difference Result 218 states and 221 transitions. [2019-11-23 22:07:33,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:07:33,200 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2019-11-23 22:07:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:33,201 INFO L225 Difference]: With dead ends: 218 [2019-11-23 22:07:33,201 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 22:07:33,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:07:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 22:07:33,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-11-23 22:07:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-23 22:07:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2019-11-23 22:07:33,206 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 129 [2019-11-23 22:07:33,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:33,206 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2019-11-23 22:07:33,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:07:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2019-11-23 22:07:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-23 22:07:33,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:33,207 INFO L410 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:33,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:33,413 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:33,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:33,414 INFO L82 PathProgramCache]: Analyzing trace with hash 670459397, now seen corresponding path program 25 times [2019-11-23 22:07:33,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:33,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412454382] [2019-11-23 22:07:33,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-23 22:07:33,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412454382] [2019-11-23 22:07:33,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117647415] [2019-11-23 22:07:33,877 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 22:07:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:33,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 22:07:33,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-11-23 22:07:33,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:33,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-23 22:07:33,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206937742] [2019-11-23 22:07:33,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:07:33,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:33,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:07:33,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:07:33,975 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 30 states. [2019-11-23 22:07:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:34,157 INFO L93 Difference]: Finished difference Result 226 states and 229 transitions. [2019-11-23 22:07:34,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:07:34,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 134 [2019-11-23 22:07:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:34,159 INFO L225 Difference]: With dead ends: 226 [2019-11-23 22:07:34,159 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 22:07:34,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=412, Invalid=518, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:07:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 22:07:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2019-11-23 22:07:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 22:07:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2019-11-23 22:07:34,165 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 134 [2019-11-23 22:07:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:34,166 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2019-11-23 22:07:34,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:07:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2019-11-23 22:07:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 22:07:34,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:34,167 INFO L410 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:34,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:34,370 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:34,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:34,371 INFO L82 PathProgramCache]: Analyzing trace with hash 985253855, now seen corresponding path program 26 times [2019-11-23 22:07:34,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:34,372 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710121355] [2019-11-23 22:07:34,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-23 22:07:34,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710121355] [2019-11-23 22:07:34,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071595046] [2019-11-23 22:07:34,839 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 22:07:34,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:34,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:34,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:07:34,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-11-23 22:07:34,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:34,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-23 22:07:34,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706719019] [2019-11-23 22:07:34,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:07:34,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:34,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:07:34,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:07:34,945 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 31 states. [2019-11-23 22:07:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:35,151 INFO L93 Difference]: Finished difference Result 234 states and 237 transitions. [2019-11-23 22:07:35,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:07:35,151 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 139 [2019-11-23 22:07:35,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:35,152 INFO L225 Difference]: With dead ends: 234 [2019-11-23 22:07:35,152 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 22:07:35,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=551, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:07:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 22:07:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2019-11-23 22:07:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-23 22:07:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2019-11-23 22:07:35,160 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 139 [2019-11-23 22:07:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:35,160 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2019-11-23 22:07:35,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:07:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2019-11-23 22:07:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-23 22:07:35,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:35,162 INFO L410 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:35,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:35,365 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:35,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1365498889, now seen corresponding path program 27 times [2019-11-23 22:07:35,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:35,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034256962] [2019-11-23 22:07:35,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-11-23 22:07:35,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034256962] [2019-11-23 22:07:35,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574691540] [2019-11-23 22:07:35,755 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 22:07:40,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-23 22:07:40,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:40,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:07:40,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2019-11-23 22:07:41,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:41,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-11-23 22:07:41,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421128558] [2019-11-23 22:07:41,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:07:41,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:07:41,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:07:41,026 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 32 states. [2019-11-23 22:07:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:41,231 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2019-11-23 22:07:41,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:07:41,232 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 144 [2019-11-23 22:07:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:41,233 INFO L225 Difference]: With dead ends: 242 [2019-11-23 22:07:41,233 INFO L226 Difference]: Without dead ends: 152 [2019-11-23 22:07:41,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=471, Invalid=585, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:07:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-23 22:07:41,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2019-11-23 22:07:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 22:07:41,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2019-11-23 22:07:41,244 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 144 [2019-11-23 22:07:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:41,248 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2019-11-23 22:07:41,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:07:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2019-11-23 22:07:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 22:07:41,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:41,249 INFO L410 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:41,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:41,458 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:41,458 INFO L82 PathProgramCache]: Analyzing trace with hash -407278117, now seen corresponding path program 28 times [2019-11-23 22:07:41,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:41,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641134141] [2019-11-23 22:07:41,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-11-23 22:07:41,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641134141] [2019-11-23 22:07:41,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694150371] [2019-11-23 22:07:41,870 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 22:07:41,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:41,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:41,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:07:41,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2019-11-23 22:07:41,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:41,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-11-23 22:07:41,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386585109] [2019-11-23 22:07:41,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:07:41,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:41,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:07:41,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:07:41,972 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 33 states. [2019-11-23 22:07:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:42,178 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2019-11-23 22:07:42,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:07:42,178 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 149 [2019-11-23 22:07:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:42,180 INFO L225 Difference]: With dead ends: 250 [2019-11-23 22:07:42,180 INFO L226 Difference]: Without dead ends: 157 [2019-11-23 22:07:42,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=502, Invalid=620, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:07:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-23 22:07:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2019-11-23 22:07:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-23 22:07:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2019-11-23 22:07:42,186 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 149 [2019-11-23 22:07:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:42,186 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2019-11-23 22:07:42,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:07:42,187 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2019-11-23 22:07:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-23 22:07:42,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:42,188 INFO L410 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:42,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:42,391 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash -355194355, now seen corresponding path program 29 times [2019-11-23 22:07:42,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:42,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966855690] [2019-11-23 22:07:42,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 22:07:43,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966855690] [2019-11-23 22:07:43,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924396808] [2019-11-23 22:07:43,130 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 22:07:43,902 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 22:07:43,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:43,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:07:43,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2019-11-23 22:07:43,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:43,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-11-23 22:07:43,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471717343] [2019-11-23 22:07:43,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:07:43,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:43,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:07:43,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:07:43,931 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 34 states. [2019-11-23 22:07:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:44,142 INFO L93 Difference]: Finished difference Result 258 states and 261 transitions. [2019-11-23 22:07:44,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:07:44,143 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 154 [2019-11-23 22:07:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:44,144 INFO L225 Difference]: With dead ends: 258 [2019-11-23 22:07:44,145 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 22:07:44,146 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=534, Invalid=656, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:07:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 22:07:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 22:07:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 22:07:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2019-11-23 22:07:44,151 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 154 [2019-11-23 22:07:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:44,151 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2019-11-23 22:07:44,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:07:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2019-11-23 22:07:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 22:07:44,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:44,153 INFO L410 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:44,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:44,358 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:44,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1547443159, now seen corresponding path program 30 times [2019-11-23 22:07:44,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:44,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897517336] [2019-11-23 22:07:44,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 22:07:44,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897517336] [2019-11-23 22:07:44,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106194084] [2019-11-23 22:07:44,872 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 22:07:49,658 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 22:07:49,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:49,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 22:07:49,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2019-11-23 22:07:49,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:49,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2019-11-23 22:07:49,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763171093] [2019-11-23 22:07:49,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:07:49,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:49,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:07:49,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:07:49,706 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 35 states. [2019-11-23 22:07:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:49,968 INFO L93 Difference]: Finished difference Result 266 states and 269 transitions. [2019-11-23 22:07:49,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:07:49,968 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 159 [2019-11-23 22:07:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:49,969 INFO L225 Difference]: With dead ends: 266 [2019-11-23 22:07:49,970 INFO L226 Difference]: Without dead ends: 167 [2019-11-23 22:07:49,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=567, Invalid=693, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:07:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-23 22:07:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2019-11-23 22:07:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-23 22:07:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2019-11-23 22:07:49,978 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 159 [2019-11-23 22:07:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:49,978 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2019-11-23 22:07:49,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:07:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2019-11-23 22:07:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-23 22:07:49,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:49,980 INFO L410 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:50,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:50,190 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:50,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:50,191 INFO L82 PathProgramCache]: Analyzing trace with hash -84176879, now seen corresponding path program 31 times [2019-11-23 22:07:50,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:50,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8472] [2019-11-23 22:07:50,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-11-23 22:07:50,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8472] [2019-11-23 22:07:50,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434116240] [2019-11-23 22:07:50,681 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 22:07:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:50,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 22:07:50,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2019-11-23 22:07:50,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:50,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-11-23 22:07:50,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721665796] [2019-11-23 22:07:50,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:07:50,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:50,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:07:50,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:07:50,812 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 36 states. [2019-11-23 22:07:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:51,039 INFO L93 Difference]: Finished difference Result 274 states and 277 transitions. [2019-11-23 22:07:51,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:07:51,040 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 164 [2019-11-23 22:07:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:51,042 INFO L225 Difference]: With dead ends: 274 [2019-11-23 22:07:51,042 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 22:07:51,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=601, Invalid=731, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:07:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 22:07:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2019-11-23 22:07:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-23 22:07:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2019-11-23 22:07:51,048 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 164 [2019-11-23 22:07:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:51,048 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2019-11-23 22:07:51,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:07:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2019-11-23 22:07:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-23 22:07:51,049 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:51,049 INFO L410 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:51,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:51,253 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash 898470355, now seen corresponding path program 32 times [2019-11-23 22:07:51,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:51,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715675380] [2019-11-23 22:07:51,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2019-11-23 22:07:51,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715675380] [2019-11-23 22:07:51,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081250013] [2019-11-23 22:07:51,790 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 22:07:51,876 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:51,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:51,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:07:51,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2019-11-23 22:07:51,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:51,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-11-23 22:07:51,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284954761] [2019-11-23 22:07:51,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:07:51,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:51,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:07:51,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:07:51,920 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand 37 states. [2019-11-23 22:07:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:52,163 INFO L93 Difference]: Finished difference Result 282 states and 285 transitions. [2019-11-23 22:07:52,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:07:52,164 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 169 [2019-11-23 22:07:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:52,165 INFO L225 Difference]: With dead ends: 282 [2019-11-23 22:07:52,166 INFO L226 Difference]: Without dead ends: 177 [2019-11-23 22:07:52,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=636, Invalid=770, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:07:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-11-23 22:07:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2019-11-23 22:07:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-23 22:07:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2019-11-23 22:07:52,171 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 169 [2019-11-23 22:07:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:52,171 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2019-11-23 22:07:52,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:07:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2019-11-23 22:07:52,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-23 22:07:52,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:52,172 INFO L410 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:52,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:52,372 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1584509419, now seen corresponding path program 33 times [2019-11-23 22:07:52,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:52,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79634113] [2019-11-23 22:07:52,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-11-23 22:07:52,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79634113] [2019-11-23 22:07:52,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218833735] [2019-11-23 22:07:52,916 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 22:08:04,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-11-23 22:08:04,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:05,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:08:05,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2019-11-23 22:08:05,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:05,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2019-11-23 22:08:05,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454845585] [2019-11-23 22:08:05,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:08:05,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:05,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:08:05,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:08:05,047 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 38 states. [2019-11-23 22:08:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:05,300 INFO L93 Difference]: Finished difference Result 290 states and 293 transitions. [2019-11-23 22:08:05,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:08:05,301 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 174 [2019-11-23 22:08:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:05,302 INFO L225 Difference]: With dead ends: 290 [2019-11-23 22:08:05,303 INFO L226 Difference]: Without dead ends: 182 [2019-11-23 22:08:05,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=672, Invalid=810, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:08:05,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-23 22:08:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2019-11-23 22:08:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 22:08:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2019-11-23 22:08:05,309 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 174 [2019-11-23 22:08:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:05,310 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2019-11-23 22:08:05,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:08:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2019-11-23 22:08:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 22:08:05,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:05,311 INFO L410 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:05,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:05,521 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:05,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:05,522 INFO L82 PathProgramCache]: Analyzing trace with hash 905547727, now seen corresponding path program 34 times [2019-11-23 22:08:05,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:05,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635767815] [2019-11-23 22:08:05,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2019-11-23 22:08:06,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635767815] [2019-11-23 22:08:06,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147239093] [2019-11-23 22:08:06,137 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 22:08:06,228 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:06,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:06,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:08:06,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2019-11-23 22:08:06,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:06,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-11-23 22:08:06,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435882585] [2019-11-23 22:08:06,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:08:06,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:06,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:08:06,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:08:06,287 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 39 states. [2019-11-23 22:08:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:06,538 INFO L93 Difference]: Finished difference Result 298 states and 301 transitions. [2019-11-23 22:08:06,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:08:06,538 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 179 [2019-11-23 22:08:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:06,540 INFO L225 Difference]: With dead ends: 298 [2019-11-23 22:08:06,540 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 22:08:06,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=709, Invalid=851, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:08:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 22:08:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2019-11-23 22:08:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-11-23 22:08:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2019-11-23 22:08:06,545 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 179 [2019-11-23 22:08:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:06,546 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2019-11-23 22:08:06,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:08:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2019-11-23 22:08:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-23 22:08:06,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:06,547 INFO L410 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:06,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:06,747 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:06,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1690262503, now seen corresponding path program 35 times [2019-11-23 22:08:06,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:06,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860360501] [2019-11-23 22:08:06,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-11-23 22:08:07,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860360501] [2019-11-23 22:08:07,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732701870] [2019-11-23 22:08:07,333 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 22:08:08,541 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 22:08:08,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:08,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 22:08:08,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2019-11-23 22:08:08,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:08,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2019-11-23 22:08:08,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735208641] [2019-11-23 22:08:08,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:08:08,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:08,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:08:08,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:08:08,609 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 40 states. [2019-11-23 22:08:08,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:08,848 INFO L93 Difference]: Finished difference Result 306 states and 309 transitions. [2019-11-23 22:08:08,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:08:08,849 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 184 [2019-11-23 22:08:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:08,850 INFO L225 Difference]: With dead ends: 306 [2019-11-23 22:08:08,850 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 22:08:08,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=747, Invalid=893, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:08:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 22:08:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2019-11-23 22:08:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-23 22:08:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2019-11-23 22:08:08,857 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 184 [2019-11-23 22:08:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:08,858 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2019-11-23 22:08:08,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:08:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2019-11-23 22:08:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-23 22:08:08,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:08,859 INFO L410 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:09,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:09,061 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:09,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1060383285, now seen corresponding path program 36 times [2019-11-23 22:08:09,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:09,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460682413] [2019-11-23 22:08:09,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2019-11-23 22:08:09,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460682413] [2019-11-23 22:08:09,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341974532] [2019-11-23 22:08:09,693 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