/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/reducercommutativity/avg40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:25:07,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:25:07,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:25:07,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:25:07,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:25:07,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:25:07,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:25:07,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:25:07,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:25:07,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:25:07,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:25:07,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:25:07,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:25:07,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:25:07,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:25:07,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:25:07,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:25:07,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:25:07,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:25:07,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:25:07,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:25:07,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:25:07,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:25:07,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:25:07,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:25:07,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:25:07,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:25:07,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:25:07,218 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 22:25:07,239 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:25:07,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:25:07,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:25:07,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:25:07,242 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:25:07,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:25:07,243 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:25:07,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:25:07,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:25:07,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:25:07,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:25:07,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:25:07,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:25:07,244 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:25:07,244 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:25:07,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:25:07,245 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:25:07,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:25:07,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:25:07,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:25:07,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:25:07,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:25:07,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:25:07,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:25:07,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:25:07,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:25:07,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:25:07,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:25:07,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:25:07,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:25:07,535 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:25:07,547 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:25:07,551 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:25:07,552 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:25:07,553 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:25:07,553 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg40-2.i [2019-11-23 22:25:07,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77e4f8d48/84449c24206247acb6c839f588d0e065/FLAGb73d34376 [2019-11-23 22:25:08,056 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:25:08,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg40-2.i [2019-11-23 22:25:08,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77e4f8d48/84449c24206247acb6c839f588d0e065/FLAGb73d34376 [2019-11-23 22:25:08,444 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77e4f8d48/84449c24206247acb6c839f588d0e065 [2019-11-23 22:25:08,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:25:08,456 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:25:08,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:25:08,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:25:08,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:25:08,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e90e1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08, skipping insertion in model container [2019-11-23 22:25:08,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:25:08,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:25:08,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:25:08,669 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:25:08,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:25:08,704 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:25:08,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08 WrapperNode [2019-11-23 22:25:08,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:25:08,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:25:08,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:25:08,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:25:08,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:25:08,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:25:08,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:25:08,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:25:08,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (1/1) ... [2019-11-23 22:25:08,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:25:08,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:25:08,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:25:08,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:25:08,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (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 22:25:08,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:25:08,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:25:08,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:25:08,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:25:08,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:25:08,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:25:09,240 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:25:09,241 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:25:09,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:25:09 BoogieIcfgContainer [2019-11-23 22:25:09,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:25:09,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:25:09,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:25:09,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:25:09,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:25:08" (1/3) ... [2019-11-23 22:25:09,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a771b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:25:09, skipping insertion in model container [2019-11-23 22:25:09,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:25:08" (2/3) ... [2019-11-23 22:25:09,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a771b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:25:09, skipping insertion in model container [2019-11-23 22:25:09,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:25:09" (3/3) ... [2019-11-23 22:25:09,251 INFO L109 eAbstractionObserver]: Analyzing ICFG avg40-2.i [2019-11-23 22:25:09,261 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:25:09,267 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:25:09,279 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:25:09,307 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:25:09,307 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:25:09,307 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:25:09,307 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:25:09,308 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:25:09,308 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:25:09,308 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:25:09,308 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:25:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 22:25:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:25:09,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:09,327 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:09,327 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 22:25:09,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:09,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139715969] [2019-11-23 22:25:09,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:09,494 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 22:25:09,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139715969] [2019-11-23 22:25:09,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:25:09,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:25:09,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486724182] [2019-11-23 22:25:09,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:25:09,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:09,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:25:09,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:25:09,520 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 22:25:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:09,572 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 22:25:09,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:25:09,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:25:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:09,590 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:25:09,590 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:25:09,594 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 22:25:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:25:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 22:25:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:25:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 22:25:09,625 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 22:25:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:09,626 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 22:25:09,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:25:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 22:25:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:25:09,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:09,628 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:09,628 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 22:25:09,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:09,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380856664] [2019-11-23 22:25:09,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:09,706 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 22:25:09,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380856664] [2019-11-23 22:25:09,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:25:09,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:25:09,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042439866] [2019-11-23 22:25:09,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:25:09,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:09,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:25:09,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:25:09,712 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 22:25:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:09,773 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:25:09,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:25:09,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:25:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:09,775 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:25:09,775 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:25:09,776 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 22:25:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:25:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 22:25:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:25:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:25:09,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 22:25:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:09,784 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:25:09,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:25:09,784 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:25:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:25:09,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:09,785 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:09,785 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:09,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:09,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 22:25:09,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:09,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837608181] [2019-11-23 22:25:09,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:25:09,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837608181] [2019-11-23 22:25:09,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:25:09,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:25:09,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632382429] [2019-11-23 22:25:09,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:25:09,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:09,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:25:09,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:25:09,917 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 22:25:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:09,941 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 22:25:09,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:25:09,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 22:25:09,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:09,943 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:25:09,943 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:25:09,944 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 22:25:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:25:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:25:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:25:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 22:25:09,952 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 22:25:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:09,953 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 22:25:09,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:25:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 22:25:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:25:09,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:09,954 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:09,955 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:09,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:09,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 22:25:09,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:09,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259629833] [2019-11-23 22:25:09,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:25:10,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259629833] [2019-11-23 22:25:10,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891341427] [2019-11-23 22:25:10,051 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 22:25:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:10,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:25:10,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:25:10,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:10,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:25:10,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068443746] [2019-11-23 22:25:10,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:25:10,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:25:10,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:25:10,201 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 22:25:10,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:10,230 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 22:25:10,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:25:10,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 22:25:10,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:10,232 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:25:10,232 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:25:10,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:25:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:25:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:25:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:25:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 22:25:10,238 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 22:25:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:10,239 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 22:25:10,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:25:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 22:25:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:25:10,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:10,240 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:10,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:10,446 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:10,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 22:25:10,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:10,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869783325] [2019-11-23 22:25:10,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:25:10,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869783325] [2019-11-23 22:25:10,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475054034] [2019-11-23 22:25:10,559 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 22:25:10,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:10,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:10,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:25:10,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:25:10,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:10,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 22:25:10,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713957002] [2019-11-23 22:25:10,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:25:10,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:10,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:25:10,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:25:10,646 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 22:25:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:10,713 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 22:25:10,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:25:10,715 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 22:25:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:10,716 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:25:10,716 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:25:10,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:25:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:25:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 22:25:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:25:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 22:25:10,722 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 22:25:10,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:10,723 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 22:25:10,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:25:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 22:25:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:25:10,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:10,724 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:10,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:10,928 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:10,929 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 22:25:10,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:10,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695909835] [2019-11-23 22:25:10,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:25:11,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695909835] [2019-11-23 22:25:11,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693337032] [2019-11-23 22:25:11,037 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 22:25:11,115 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:25:11,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:11,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:25:11,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:25:11,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:11,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:25:11,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263680076] [2019-11-23 22:25:11,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:25:11,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:11,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:25:11,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:25:11,156 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 22:25:11,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:11,264 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 22:25:11,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:25:11,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 22:25:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:11,265 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:25:11,265 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:25:11,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:25:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:25:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 22:25:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:25:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 22:25:11,280 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 22:25:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:11,280 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 22:25:11,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:25:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 22:25:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:25:11,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:11,282 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:11,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:11,487 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:11,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 22:25:11,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:11,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032014502] [2019-11-23 22:25:11,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:25:11,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032014502] [2019-11-23 22:25:11,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488478259] [2019-11-23 22:25:11,568 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 22:25:11,632 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:11,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:11,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:25:11,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:25:11,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:11,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:25:11,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016369132] [2019-11-23 22:25:11,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:25:11,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:25:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:25:11,676 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 22:25:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:11,785 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 22:25:11,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:25:11,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 22:25:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:11,787 INFO L225 Difference]: With dead ends: 85 [2019-11-23 22:25:11,787 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:25:11,788 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:25:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:25:11,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 22:25:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:25:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 22:25:11,794 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 22:25:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:11,795 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 22:25:11,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:25:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 22:25:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:25:11,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:11,797 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:12,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:12,001 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:12,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:12,002 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 22:25:12,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:12,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961670068] [2019-11-23 22:25:12,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 22:25:12,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961670068] [2019-11-23 22:25:12,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260318736] [2019-11-23 22:25:12,119 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 22:25:12,237 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:25:12,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:12,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:25:12,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:25:12,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:12,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 22:25:12,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654661868] [2019-11-23 22:25:12,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:25:12,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:12,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:25:12,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:12,297 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 22:25:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:12,397 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 22:25:12,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:25:12,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 22:25:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:12,399 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:25:12,399 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:25:12,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:25:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 22:25:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:25:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 22:25:12,412 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 22:25:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:12,413 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 22:25:12,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:25:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 22:25:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:25:12,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:12,415 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:12,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:12,616 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:12,617 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 22:25:12,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:12,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751057951] [2019-11-23 22:25:12,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 22:25:12,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751057951] [2019-11-23 22:25:12,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353116981] [2019-11-23 22:25:12,722 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 22:25:12,796 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 22:25:12,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:12,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:25:12,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 22:25:12,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:12,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 22:25:12,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617341396] [2019-11-23 22:25:12,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:25:12,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:12,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:25:12,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:12,845 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 22:25:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:12,899 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 22:25:12,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:25:12,901 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 22:25:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:12,901 INFO L225 Difference]: With dead ends: 107 [2019-11-23 22:25:12,902 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:25:12,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:12,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:25:12,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 22:25:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:25:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 22:25:12,910 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 22:25:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:12,911 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 22:25:12,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:25:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 22:25:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:25:12,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:12,912 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:13,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:13,123 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:13,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 22:25:13,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:13,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897319922] [2019-11-23 22:25:13,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:13,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897319922] [2019-11-23 22:25:13,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987519739] [2019-11-23 22:25:13,245 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 22:25:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:13,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:25:13,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:13,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:13,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:25:13,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131757412] [2019-11-23 22:25:13,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:25:13,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:13,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:25:13,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:25:13,336 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 22:25:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:13,380 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 22:25:13,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:25:13,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 22:25:13,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:13,381 INFO L225 Difference]: With dead ends: 110 [2019-11-23 22:25:13,381 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:25:13,382 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:25:13,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:25:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 22:25:13,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:25:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 22:25:13,388 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 22:25:13,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:13,388 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 22:25:13,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:25:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 22:25:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:25:13,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:13,389 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:13,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:13,601 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 22:25:13,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:13,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853154096] [2019-11-23 22:25:13,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:13,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853154096] [2019-11-23 22:25:13,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98377087] [2019-11-23 22:25:13,701 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 22:25:13,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:13,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:13,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:25:13,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:13,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:13,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:25:13,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971895514] [2019-11-23 22:25:13,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:25:13,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:13,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:25:13,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:13,794 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 22:25:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:13,854 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 22:25:13,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:25:13,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 22:25:13,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:13,855 INFO L225 Difference]: With dead ends: 112 [2019-11-23 22:25:13,855 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:25:13,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:25:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:25:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 22:25:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:25:13,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 22:25:13,862 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 22:25:13,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:13,862 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 22:25:13,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:25:13,862 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 22:25:13,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:25:13,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:13,863 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:14,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:14,067 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:14,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 22:25:14,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:14,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13251966] [2019-11-23 22:25:14,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:25:14,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13251966] [2019-11-23 22:25:14,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769558484] [2019-11-23 22:25:14,200 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 22:25:14,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:25:14,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:14,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:25:14,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 22:25:14,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:14,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 22:25:14,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936491181] [2019-11-23 22:25:14,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:25:14,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:14,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:25:14,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:25:14,335 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 22:25:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:14,433 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 22:25:14,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:25:14,433 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 22:25:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:14,434 INFO L225 Difference]: With dead ends: 117 [2019-11-23 22:25:14,434 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 22:25:14,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:25:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 22:25:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 22:25:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 22:25:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 22:25:14,441 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 22:25:14,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:14,442 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 22:25:14,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:25:14,442 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 22:25:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 22:25:14,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:14,443 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:14,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:14,647 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:14,647 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 22:25:14,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:14,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648909980] [2019-11-23 22:25:14,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:14,764 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 22:25:14,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648909980] [2019-11-23 22:25:14,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496273179] [2019-11-23 22:25:14,765 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 22:25:14,833 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:14,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:14,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:25:14,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:14,867 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 22:25:14,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:14,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 22:25:14,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910825394] [2019-11-23 22:25:14,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:25:14,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:25:14,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:25:14,870 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 22:25:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:14,925 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 22:25:14,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:25:14,926 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 22:25:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:14,927 INFO L225 Difference]: With dead ends: 120 [2019-11-23 22:25:14,927 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:25:14,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:25:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:25:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 22:25:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:25:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 22:25:14,943 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 22:25:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:14,943 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 22:25:14,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:25:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 22:25:14,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:25:14,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:14,945 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:15,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:15,146 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 22:25:15,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:15,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128753997] [2019-11-23 22:25:15,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:25:15,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128753997] [2019-11-23 22:25:15,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023802909] [2019-11-23 22:25:15,299 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 22:25:15,589 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:25:15,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:15,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:25:15,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 22:25:15,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:15,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 22:25:15,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630019465] [2019-11-23 22:25:15,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:25:15,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:15,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:25:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:25:15,664 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 22:25:15,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:15,794 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 22:25:15,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:25:15,795 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 22:25:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:15,796 INFO L225 Difference]: With dead ends: 131 [2019-11-23 22:25:15,796 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:25:15,796 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:25:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:25:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 22:25:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:25:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 22:25:15,802 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 22:25:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:15,803 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 22:25:15,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:25:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 22:25:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:25:15,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:15,812 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:16,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:16,022 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:16,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:16,023 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 22:25:16,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:16,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487112049] [2019-11-23 22:25:16,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 22:25:16,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487112049] [2019-11-23 22:25:16,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859992276] [2019-11-23 22:25:16,190 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 22:25:16,360 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:25:16,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:16,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:25:16,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 22:25:16,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:16,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 22:25:16,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691891125] [2019-11-23 22:25:16,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:25:16,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:16,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:25:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:25:16,422 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 22:25:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:16,497 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 22:25:16,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:25:16,498 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 22:25:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:16,499 INFO L225 Difference]: With dead ends: 139 [2019-11-23 22:25:16,499 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 22:25:16,499 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:25:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 22:25:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 22:25:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 22:25:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 22:25:16,512 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 22:25:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:16,512 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 22:25:16,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:25:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 22:25:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 22:25:16,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:16,513 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:16,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:16,718 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:16,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 22:25:16,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:16,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429027411] [2019-11-23 22:25:16,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:16,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429027411] [2019-11-23 22:25:16,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556906993] [2019-11-23 22:25:16,879 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 22:25:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:16,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:25:16,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:17,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:17,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:25:17,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622415897] [2019-11-23 22:25:17,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:25:17,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:17,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:25:17,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:25:17,010 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 22:25:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:17,061 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 22:25:17,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:25:17,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 22:25:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:17,062 INFO L225 Difference]: With dead ends: 142 [2019-11-23 22:25:17,062 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 22:25:17,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:25:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 22:25:17,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 22:25:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:25:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 22:25:17,068 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 22:25:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:17,068 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 22:25:17,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:25:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 22:25:17,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:25:17,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:17,070 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:17,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:17,282 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:17,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 22:25:17,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:17,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687006786] [2019-11-23 22:25:17,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:17,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687006786] [2019-11-23 22:25:17,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065502036] [2019-11-23 22:25:17,444 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 22:25:17,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:17,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:17,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:25:17,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:17,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:17,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:25:17,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510389314] [2019-11-23 22:25:17,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:25:17,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:17,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:25:17,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:25:17,547 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 22:25:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:17,611 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 22:25:17,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:25:17,612 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 22:25:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:17,613 INFO L225 Difference]: With dead ends: 144 [2019-11-23 22:25:17,613 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 22:25:17,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:25:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 22:25:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 22:25:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 22:25:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 22:25:17,618 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 22:25:17,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:17,619 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 22:25:17,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:25:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 22:25:17,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 22:25:17,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:17,620 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:17,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:17,825 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 22:25:17,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:17,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798540446] [2019-11-23 22:25:17,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:25:17,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798540446] [2019-11-23 22:25:17,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662888348] [2019-11-23 22:25:17,997 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 22:25:18,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:25:18,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:18,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:25:18,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 22:25:18,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:18,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 22:25:18,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140677260] [2019-11-23 22:25:18,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:25:18,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:18,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:25:18,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:25:18,193 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 22:25:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:18,304 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 22:25:18,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:25:18,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 22:25:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:18,307 INFO L225 Difference]: With dead ends: 149 [2019-11-23 22:25:18,307 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 22:25:18,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:25:18,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 22:25:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 22:25:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 22:25:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 22:25:18,311 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 22:25:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:18,311 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 22:25:18,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:25:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 22:25:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 22:25:18,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:18,313 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:18,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:18,517 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:18,518 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 22:25:18,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:18,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107369955] [2019-11-23 22:25:18,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 22:25:18,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107369955] [2019-11-23 22:25:18,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581047184] [2019-11-23 22:25:18,931 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 22:25:18,993 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:18,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:18,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:25:18,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 22:25:19,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:19,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 22:25:19,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025141493] [2019-11-23 22:25:19,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:25:19,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:19,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:25:19,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:25:19,084 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 22:25:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:19,304 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 22:25:19,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:25:19,305 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 22:25:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:19,306 INFO L225 Difference]: With dead ends: 161 [2019-11-23 22:25:19,306 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:25:19,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:25:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:25:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 22:25:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 22:25:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 22:25:19,311 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 22:25:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:19,311 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 22:25:19,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:25:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 22:25:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 22:25:19,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:19,312 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:19,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:19,516 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:19,516 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 22:25:19,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:19,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783366524] [2019-11-23 22:25:19,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 22:25:19,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783366524] [2019-11-23 22:25:19,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214670419] [2019-11-23 22:25:19,731 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 22:25:21,705 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:25:21,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:21,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:25:21,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 22:25:21,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:21,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 22:25:21,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407519770] [2019-11-23 22:25:21,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:25:21,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:21,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:25:21,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:25:21,827 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 22:25:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:22,057 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 22:25:22,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:25:22,058 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 22:25:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:22,059 INFO L225 Difference]: With dead ends: 175 [2019-11-23 22:25:22,059 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 22:25:22,059 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:25:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 22:25:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 22:25:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 22:25:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 22:25:22,064 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 22:25:22,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:22,065 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 22:25:22,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:25:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 22:25:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 22:25:22,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:22,066 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:22,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:22,276 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:22,276 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 22:25:22,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:22,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722068515] [2019-11-23 22:25:22,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 22:25:22,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722068515] [2019-11-23 22:25:22,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542852373] [2019-11-23 22:25:22,523 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 22:25:23,004 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:25:23,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:23,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:25:23,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 22:25:23,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:23,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 22:25:23,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060558841] [2019-11-23 22:25:23,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:25:23,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:23,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:25:23,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:25:23,118 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 22:25:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:23,208 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 22:25:23,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:25:23,208 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 22:25:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:23,209 INFO L225 Difference]: With dead ends: 183 [2019-11-23 22:25:23,209 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 22:25:23,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:25:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 22:25:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 22:25:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 22:25:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 22:25:23,212 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 22:25:23,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:23,212 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 22:25:23,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:25:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 22:25:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 22:25:23,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:23,213 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:23,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:23,414 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 22:25:23,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:23,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845289633] [2019-11-23 22:25:23,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:25:23,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845289633] [2019-11-23 22:25:23,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89306850] [2019-11-23 22:25:23,666 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 22:25:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:23,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:25:23,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:25:23,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:23,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:25:23,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715728652] [2019-11-23 22:25:23,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:25:23,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:23,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:25:23,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:25:23,819 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 22:25:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:23,880 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 22:25:23,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:25:23,882 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 22:25:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:23,883 INFO L225 Difference]: With dead ends: 186 [2019-11-23 22:25:23,883 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 22:25:23,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:25:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 22:25:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 22:25:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:25:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 22:25:23,889 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 22:25:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:23,890 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 22:25:23,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:25:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 22:25:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 22:25:23,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:23,891 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:24,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:24,095 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:24,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:24,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 22:25:24,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:24,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510177306] [2019-11-23 22:25:24,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:25:24,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510177306] [2019-11-23 22:25:24,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274756255] [2019-11-23 22:25:24,367 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 22:25:24,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:24,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:24,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:25:24,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:25:24,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:24,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 22:25:24,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94882191] [2019-11-23 22:25:24,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:25:24,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:24,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:25:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:25:24,469 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 22:25:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:24,557 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 22:25:24,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:25:24,560 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 22:25:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:24,561 INFO L225 Difference]: With dead ends: 188 [2019-11-23 22:25:24,561 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 22:25:24,561 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:25:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 22:25:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 22:25:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 22:25:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 22:25:24,565 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 22:25:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:24,566 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 22:25:24,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:25:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 22:25:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 22:25:24,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:24,567 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:24,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:24,771 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:24,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 22:25:24,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:24,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001773350] [2019-11-23 22:25:24,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:25:25,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001773350] [2019-11-23 22:25:25,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779362376] [2019-11-23 22:25:25,087 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 22:25:25,212 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:25:25,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:25,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:25:25,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 41 proven. 49 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-23 22:25:25,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:25,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2019-11-23 22:25:25,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837203309] [2019-11-23 22:25:25,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:25:25,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:25:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:25:25,428 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 35 states. [2019-11-23 22:25:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:26,526 INFO L93 Difference]: Finished difference Result 200 states and 212 transitions. [2019-11-23 22:25:26,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:25:26,527 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 115 [2019-11-23 22:25:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:26,528 INFO L225 Difference]: With dead ends: 200 [2019-11-23 22:25:26,528 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 22:25:26,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 22:25:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 22:25:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2019-11-23 22:25:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 22:25:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 22:25:26,537 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 115 [2019-11-23 22:25:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:26,538 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 22:25:26,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:25:26,538 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 22:25:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 22:25:26,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:26,540 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:26,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:26,744 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:26,745 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 22 times [2019-11-23 22:25:26,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:26,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355306217] [2019-11-23 22:25:26,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:25:27,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355306217] [2019-11-23 22:25:27,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728959581] [2019-11-23 22:25:27,157 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 22:25:27,288 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:27,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:27,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:25:27,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:25:27,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:27,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 22:25:27,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824876153] [2019-11-23 22:25:27,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:25:27,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:27,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:25:27,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:25:27,356 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 27 states. [2019-11-23 22:25:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:27,504 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2019-11-23 22:25:27,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:25:27,504 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2019-11-23 22:25:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:27,505 INFO L225 Difference]: With dead ends: 206 [2019-11-23 22:25:27,505 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 22:25:27,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:25:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 22:25:27,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-11-23 22:25:27,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 22:25:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2019-11-23 22:25:27,512 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2019-11-23 22:25:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:27,513 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2019-11-23 22:25:27,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:25:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2019-11-23 22:25:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 22:25:27,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:27,514 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:27,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:27,719 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 23 times [2019-11-23 22:25:27,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:27,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187542375] [2019-11-23 22:25:27,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:25:28,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187542375] [2019-11-23 22:25:28,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72148101] [2019-11-23 22:25:28,165 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 22:25:30,481 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 22:25:30,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:30,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:25:30,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:25:30,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:30,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 22:25:30,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899121813] [2019-11-23 22:25:30,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:25:30,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:30,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:25:30,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:25:30,523 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2019-11-23 22:25:30,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:30,603 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2019-11-23 22:25:30,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:25:30,603 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2019-11-23 22:25:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:30,604 INFO L225 Difference]: With dead ends: 208 [2019-11-23 22:25:30,604 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 22:25:30,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:25:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 22:25:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-11-23 22:25:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-23 22:25:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2019-11-23 22:25:30,611 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2019-11-23 22:25:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:30,612 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2019-11-23 22:25:30,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:25:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2019-11-23 22:25:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 22:25:30,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:30,613 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:30,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:30,819 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:30,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 24 times [2019-11-23 22:25:30,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:30,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109986219] [2019-11-23 22:25:30,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 22:25:31,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109986219] [2019-11-23 22:25:31,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893111515] [2019-11-23 22:25:31,188 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 22:25:32,094 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 22:25:32,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:32,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:25:32,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2019-11-23 22:25:32,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:32,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14] total 40 [2019-11-23 22:25:32,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560427689] [2019-11-23 22:25:32,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:25:32,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:32,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:25:32,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:25:32,370 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 40 states. [2019-11-23 22:25:32,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:32,908 INFO L93 Difference]: Finished difference Result 214 states and 224 transitions. [2019-11-23 22:25:32,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:25:32,909 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 129 [2019-11-23 22:25:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:32,910 INFO L225 Difference]: With dead ends: 214 [2019-11-23 22:25:32,910 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 22:25:32,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=598, Invalid=1852, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:25:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 22:25:32,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-11-23 22:25:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 22:25:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-11-23 22:25:32,919 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 129 [2019-11-23 22:25:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:32,919 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-11-23 22:25:32,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:25:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-11-23 22:25:32,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 22:25:32,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:32,921 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:33,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:33,127 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:33,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:33,129 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 25 times [2019-11-23 22:25:33,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:33,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284126480] [2019-11-23 22:25:33,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:25:33,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284126480] [2019-11-23 22:25:33,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925152000] [2019-11-23 22:25:33,748 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 22:25:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:33,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:25:33,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:25:33,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:33,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 22:25:33,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42346406] [2019-11-23 22:25:33,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:25:33,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:33,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:25:33,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:25:33,892 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2019-11-23 22:25:33,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:33,991 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2019-11-23 22:25:33,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:25:33,991 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2019-11-23 22:25:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:33,992 INFO L225 Difference]: With dead ends: 218 [2019-11-23 22:25:33,992 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 22:25:33,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:25:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 22:25:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-23 22:25:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 22:25:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 22:25:33,998 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2019-11-23 22:25:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:33,998 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 22:25:33,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:25:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 22:25:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 22:25:33,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:33,999 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:34,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:34,203 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 26 times [2019-11-23 22:25:34,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:34,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992847233] [2019-11-23 22:25:34,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:25:34,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992847233] [2019-11-23 22:25:34,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35642402] [2019-11-23 22:25:34,805 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 22:25:34,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:34,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:34,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:25:34,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:25:34,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:34,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 22:25:34,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911893298] [2019-11-23 22:25:34,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:25:34,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:34,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:25:34,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:25:34,948 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 32 states. [2019-11-23 22:25:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:35,048 INFO L93 Difference]: Finished difference Result 220 states and 228 transitions. [2019-11-23 22:25:35,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:25:35,049 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 137 [2019-11-23 22:25:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:35,050 INFO L225 Difference]: With dead ends: 220 [2019-11-23 22:25:35,050 INFO L226 Difference]: Without dead ends: 141 [2019-11-23 22:25:35,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:25:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-23 22:25:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-23 22:25:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 22:25:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2019-11-23 22:25:35,057 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2019-11-23 22:25:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:35,057 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2019-11-23 22:25:35,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:25:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2019-11-23 22:25:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 22:25:35,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:35,058 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:35,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:35,262 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:35,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:35,263 INFO L82 PathProgramCache]: Analyzing trace with hash 146731338, now seen corresponding path program 27 times [2019-11-23 22:25:35,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:35,263 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572810990] [2019-11-23 22:25:35,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:25:35,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572810990] [2019-11-23 22:25:35,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637249548] [2019-11-23 22:25:35,827 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 22:25:36,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:25:36,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:36,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:25:36,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 57 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2019-11-23 22:25:36,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:36,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 14] total 44 [2019-11-23 22:25:36,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568352484] [2019-11-23 22:25:36,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:25:36,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:36,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:25:36,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:25:36,428 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 44 states. [2019-11-23 22:25:38,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:38,304 INFO L93 Difference]: Finished difference Result 232 states and 244 transitions. [2019-11-23 22:25:38,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:25:38,305 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 139 [2019-11-23 22:25:38,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:38,306 INFO L225 Difference]: With dead ends: 232 [2019-11-23 22:25:38,306 INFO L226 Difference]: Without dead ends: 153 [2019-11-23 22:25:38,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1726, Invalid=5080, Unknown=0, NotChecked=0, Total=6806 [2019-11-23 22:25:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-23 22:25:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2019-11-23 22:25:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 22:25:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2019-11-23 22:25:38,315 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 139 [2019-11-23 22:25:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:38,315 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2019-11-23 22:25:38,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:25:38,315 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2019-11-23 22:25:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 22:25:38,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:38,316 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:38,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:38,520 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1220684740, now seen corresponding path program 28 times [2019-11-23 22:25:38,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:38,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613643428] [2019-11-23 22:25:38,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:25:39,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613643428] [2019-11-23 22:25:39,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689646568] [2019-11-23 22:25:39,015 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 22:25:39,114 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:39,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:39,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 22:25:39,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:25:39,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:39,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 22:25:39,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464204173] [2019-11-23 22:25:39,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:25:39,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:39,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:25:39,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:25:39,163 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 35 states. [2019-11-23 22:25:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:39,270 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2019-11-23 22:25:39,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:25:39,271 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 149 [2019-11-23 22:25:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:39,272 INFO L225 Difference]: With dead ends: 238 [2019-11-23 22:25:39,272 INFO L226 Difference]: Without dead ends: 153 [2019-11-23 22:25:39,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:25:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-23 22:25:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2019-11-23 22:25:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-23 22:25:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2019-11-23 22:25:39,278 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2019-11-23 22:25:39,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:39,278 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2019-11-23 22:25:39,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:25:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2019-11-23 22:25:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-23 22:25:39,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:39,280 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:39,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:39,483 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash 164858882, now seen corresponding path program 29 times [2019-11-23 22:25:39,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:39,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510448757] [2019-11-23 22:25:39,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:25:40,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510448757] [2019-11-23 22:25:40,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910736970] [2019-11-23 22:25:40,131 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 22:25:43,068 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-11-23 22:25:43,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:43,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:25:43,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:25:43,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:43,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 22:25:43,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472481342] [2019-11-23 22:25:43,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:25:43,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:43,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:25:43,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:25:43,107 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 36 states. [2019-11-23 22:25:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:43,220 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2019-11-23 22:25:43,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:25:43,220 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 151 [2019-11-23 22:25:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:43,221 INFO L225 Difference]: With dead ends: 240 [2019-11-23 22:25:43,221 INFO L226 Difference]: Without dead ends: 155 [2019-11-23 22:25:43,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:25:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-11-23 22:25:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2019-11-23 22:25:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-11-23 22:25:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2019-11-23 22:25:43,228 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2019-11-23 22:25:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:43,228 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2019-11-23 22:25:43,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:25:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2019-11-23 22:25:43,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-23 22:25:43,229 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:43,229 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:43,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:43,435 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash -871508800, now seen corresponding path program 30 times [2019-11-23 22:25:43,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:43,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421687498] [2019-11-23 22:25:43,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:25:44,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421687498] [2019-11-23 22:25:44,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136851635] [2019-11-23 22:25:44,180 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 22:25:45,386 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 22:25:45,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:45,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:25:45,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2019-11-23 22:25:45,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:45,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 11] total 45 [2019-11-23 22:25:45,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451668258] [2019-11-23 22:25:45,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 22:25:45,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 22:25:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=1296, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:25:45,565 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 45 states. [2019-11-23 22:25:45,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:45,775 INFO L93 Difference]: Finished difference Result 245 states and 254 transitions. [2019-11-23 22:25:45,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 22:25:45,782 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 153 [2019-11-23 22:25:45,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:45,783 INFO L225 Difference]: With dead ends: 245 [2019-11-23 22:25:45,783 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 22:25:45,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=684, Invalid=1296, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:25:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 22:25:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2019-11-23 22:25:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 22:25:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2019-11-23 22:25:45,790 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 153 [2019-11-23 22:25:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:45,791 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2019-11-23 22:25:45,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 22:25:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2019-11-23 22:25:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 22:25:45,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:45,792 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:45,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:45,997 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:45,998 INFO L82 PathProgramCache]: Analyzing trace with hash -926307076, now seen corresponding path program 31 times [2019-11-23 22:25:45,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:45,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655935921] [2019-11-23 22:25:45,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:25:46,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655935921] [2019-11-23 22:25:46,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943457473] [2019-11-23 22:25:46,591 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 22:25:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:46,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:25:46,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:25:46,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:46,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 22:25:46,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008409189] [2019-11-23 22:25:46,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:25:46,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:46,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:25:46,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:25:46,730 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 38 states. [2019-11-23 22:25:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:46,851 INFO L93 Difference]: Finished difference Result 248 states and 256 transitions. [2019-11-23 22:25:46,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:25:46,852 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 157 [2019-11-23 22:25:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:46,852 INFO L225 Difference]: With dead ends: 248 [2019-11-23 22:25:46,852 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 22:25:46,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:25:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 22:25:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-11-23 22:25:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 22:25:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 22:25:46,858 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 157 [2019-11-23 22:25:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:46,858 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 22:25:46,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:25:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 22:25:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 22:25:46,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:46,859 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:47,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:47,063 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2064510778, now seen corresponding path program 32 times [2019-11-23 22:25:47,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:47,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620167155] [2019-11-23 22:25:47,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1549 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:25:47,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620167155] [2019-11-23 22:25:47,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931086991] [2019-11-23 22:25:47,667 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 22:25:47,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:25:47,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:47,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 22:25:47,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1549 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:25:47,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:47,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 22:25:47,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146095978] [2019-11-23 22:25:47,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:25:47,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:47,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:25:47,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:25:47,799 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 39 states. [2019-11-23 22:25:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:47,921 INFO L93 Difference]: Finished difference Result 250 states and 258 transitions. [2019-11-23 22:25:47,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:25:47,922 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 159 [2019-11-23 22:25:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:47,923 INFO L225 Difference]: With dead ends: 250 [2019-11-23 22:25:47,924 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 22:25:47,924 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:25:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 22:25:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 22:25:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 22:25:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 22:25:47,929 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 22:25:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:47,930 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 22:25:47,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:25:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 22:25:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 22:25:47,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:47,931 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:48,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:48,135 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:48,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1387619848, now seen corresponding path program 33 times [2019-11-23 22:25:48,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:48,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406758626] [2019-11-23 22:25:48,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:25:48,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406758626] [2019-11-23 22:25:48,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696592040] [2019-11-23 22:25:48,764 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 22:25:49,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:25:49,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:49,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:25:49,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 17 proven. 81 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2019-11-23 22:25:49,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:49,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 14] total 51 [2019-11-23 22:25:49,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992520425] [2019-11-23 22:25:49,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:25:49,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:49,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:25:49,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=1739, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:25:49,322 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 51 states. [2019-11-23 22:25:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:50,084 INFO L93 Difference]: Finished difference Result 261 states and 272 transitions. [2019-11-23 22:25:50,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-23 22:25:50,084 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 161 [2019-11-23 22:25:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:50,086 INFO L225 Difference]: With dead ends: 261 [2019-11-23 22:25:50,086 INFO L226 Difference]: Without dead ends: 174 [2019-11-23 22:25:50,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 22:25:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-11-23 22:25:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2019-11-23 22:25:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-23 22:25:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2019-11-23 22:25:50,093 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2019-11-23 22:25:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:50,093 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2019-11-23 22:25:50,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:25:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2019-11-23 22:25:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-23 22:25:50,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:50,094 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:50,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:50,299 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:50,299 INFO L82 PathProgramCache]: Analyzing trace with hash 720879284, now seen corresponding path program 34 times [2019-11-23 22:25:50,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:50,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592588610] [2019-11-23 22:25:50,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 22:25:51,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592588610] [2019-11-23 22:25:51,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101352185] [2019-11-23 22:25:51,125 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 22:25:51,241 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:25:51,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:25:51,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:25:51,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:25:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2019-11-23 22:25:51,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:25:51,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13] total 51 [2019-11-23 22:25:51,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622966569] [2019-11-23 22:25:51,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:25:51,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:25:51,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:25:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:25:51,519 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 51 states. [2019-11-23 22:25:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:25:51,900 INFO L93 Difference]: Finished difference Result 275 states and 286 transitions. [2019-11-23 22:25:51,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 22:25:51,901 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 169 [2019-11-23 22:25:51,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:25:51,903 INFO L225 Difference]: With dead ends: 275 [2019-11-23 22:25:51,903 INFO L226 Difference]: Without dead ends: 182 [2019-11-23 22:25:51,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:25:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-23 22:25:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2019-11-23 22:25:51,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-23 22:25:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2019-11-23 22:25:51,910 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2019-11-23 22:25:51,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:25:51,911 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2019-11-23 22:25:51,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:25:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2019-11-23 22:25:51,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-23 22:25:51,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:25:51,912 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:25:52,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:25:52,116 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:25:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:25:52,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1986259056, now seen corresponding path program 35 times [2019-11-23 22:25:52,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:25:52,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468692238] [2019-11-23 22:25:52,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:25:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:25:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1888 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2019-11-23 22:25:52,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468692238] [2019-11-23 22:25:52,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873921705] [2019-11-23 22:25:52,867 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 22:26:13,626 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2019-11-23 22:26:13,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:13,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:26:13,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1888 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1807 trivial. 0 not checked. [2019-11-23 22:26:13,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:13,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 12] total 51 [2019-11-23 22:26:13,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096236178] [2019-11-23 22:26:13,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:26:13,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:13,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:26:13,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=1665, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:26:13,903 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 51 states. [2019-11-23 22:26:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:14,181 INFO L93 Difference]: Finished difference Result 283 states and 292 transitions. [2019-11-23 22:26:14,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 22:26:14,181 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 177 [2019-11-23 22:26:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:14,183 INFO L225 Difference]: With dead ends: 283 [2019-11-23 22:26:14,183 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 22:26:14,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=885, Invalid=1665, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:26:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 22:26:14,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2019-11-23 22:26:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-23 22:26:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2019-11-23 22:26:14,189 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 177 [2019-11-23 22:26:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:14,190 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2019-11-23 22:26:14,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:26:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2019-11-23 22:26:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-23 22:26:14,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:14,191 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:14,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:14,403 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1573545300, now seen corresponding path program 36 times [2019-11-23 22:26:14,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:14,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947159063] [2019-11-23 22:26:14,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 22:26:15,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947159063] [2019-11-23 22:26:15,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062357867] [2019-11-23 22:26:15,109 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:16,799 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 22:26:16,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:16,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:26:16,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1884 trivial. 0 not checked. [2019-11-23 22:26:17,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:17,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 13] total 53 [2019-11-23 22:26:17,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305899557] [2019-11-23 22:26:17,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 22:26:17,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:17,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 22:26:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=938, Invalid=1818, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:26:17,077 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 53 states. [2019-11-23 22:26:17,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:17,350 INFO L93 Difference]: Finished difference Result 288 states and 297 transitions. [2019-11-23 22:26:17,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 22:26:17,350 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2019-11-23 22:26:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:17,351 INFO L225 Difference]: With dead ends: 288 [2019-11-23 22:26:17,351 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 22:26:17,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=938, Invalid=1818, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:26:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 22:26:17,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2019-11-23 22:26:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 22:26:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2019-11-23 22:26:17,356 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 181 [2019-11-23 22:26:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:17,356 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2019-11-23 22:26:17,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 22:26:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2019-11-23 22:26:17,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 22:26:17,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:17,359 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:17,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:17,560 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:17,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:17,560 INFO L82 PathProgramCache]: Analyzing trace with hash -456024344, now seen corresponding path program 37 times [2019-11-23 22:26:17,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:17,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681066893] [2019-11-23 22:26:17,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2019-11-23 22:26:17,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681066893] [2019-11-23 22:26:17,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408979475] [2019-11-23 22:26:17,770 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:17,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:26:17,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2019-11-23 22:26:18,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:18,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-11-23 22:26:18,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66792166] [2019-11-23 22:26:18,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:26:18,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:26:18,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:26:18,078 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 26 states. [2019-11-23 22:26:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:18,296 INFO L93 Difference]: Finished difference Result 277 states and 287 transitions. [2019-11-23 22:26:18,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:26:18,296 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 185 [2019-11-23 22:26:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:18,297 INFO L225 Difference]: With dead ends: 277 [2019-11-23 22:26:18,297 INFO L226 Difference]: Without dead ends: 198 [2019-11-23 22:26:18,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:26:18,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-11-23 22:26:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2019-11-23 22:26:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 22:26:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-11-23 22:26:18,305 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 185 [2019-11-23 22:26:18,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:18,305 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-11-23 22:26:18,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:26:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-11-23 22:26:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 22:26:18,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:18,306 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:18,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:18,510 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:18,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1750482404, now seen corresponding path program 38 times [2019-11-23 22:26:18,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:18,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56603300] [2019-11-23 22:26:18,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2019-11-23 22:26:18,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56603300] [2019-11-23 22:26:18,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406644564] [2019-11-23 22:26:18,763 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:18,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:18,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:18,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:26:18,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2019-11-23 22:26:19,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:19,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2019-11-23 22:26:19,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642623780] [2019-11-23 22:26:19,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:26:19,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:19,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:26:19,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:26:19,103 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 28 states. [2019-11-23 22:26:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:19,350 INFO L93 Difference]: Finished difference Result 291 states and 301 transitions. [2019-11-23 22:26:19,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:26:19,351 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 193 [2019-11-23 22:26:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:19,353 INFO L225 Difference]: With dead ends: 291 [2019-11-23 22:26:19,353 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 22:26:19,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:26:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 22:26:19,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 202. [2019-11-23 22:26:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-11-23 22:26:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2019-11-23 22:26:19,361 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 193 [2019-11-23 22:26:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:19,361 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2019-11-23 22:26:19,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:26:19,362 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2019-11-23 22:26:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-11-23 22:26:19,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:19,363 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:19,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:19,567 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1165012960, now seen corresponding path program 39 times [2019-11-23 22:26:19,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:19,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148280897] [2019-11-23 22:26:19,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2019-11-23 22:26:19,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148280897] [2019-11-23 22:26:19,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356161301] [2019-11-23 22:26:19,798 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:20,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-11-23 22:26:20,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:20,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:26:20,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 79 proven. 169 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2019-11-23 22:26:20,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:20,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 20 [2019-11-23 22:26:20,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041871809] [2019-11-23 22:26:20,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:26:20,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:20,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:26:20,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:26:20,645 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand 20 states. [2019-11-23 22:26:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:21,102 INFO L93 Difference]: Finished difference Result 302 states and 311 transitions. [2019-11-23 22:26:21,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:26:21,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2019-11-23 22:26:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:21,104 INFO L225 Difference]: With dead ends: 302 [2019-11-23 22:26:21,104 INFO L226 Difference]: Without dead ends: 211 [2019-11-23 22:26:21,105 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:26:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-11-23 22:26:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2019-11-23 22:26:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-11-23 22:26:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2019-11-23 22:26:21,112 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 201 [2019-11-23 22:26:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:21,112 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2019-11-23 22:26:21,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:26:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2019-11-23 22:26:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-23 22:26:21,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:21,113 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:21,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:21,319 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1022408158, now seen corresponding path program 40 times [2019-11-23 22:26:21,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:21,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833375399] [2019-11-23 22:26:21,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2188 trivial. 0 not checked. [2019-11-23 22:26:21,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833375399] [2019-11-23 22:26:21,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857392512] [2019-11-23 22:26:21,516 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:21,638 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:21,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:21,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:26:21,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2357 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2161 trivial. 0 not checked. [2019-11-23 22:26:21,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:21,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-11-23 22:26:21,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408833934] [2019-11-23 22:26:21,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:26:21,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:26:21,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:26:21,882 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand 31 states. [2019-11-23 22:26:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:22,227 INFO L93 Difference]: Finished difference Result 315 states and 325 transitions. [2019-11-23 22:26:22,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:26:22,228 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 207 [2019-11-23 22:26:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:22,230 INFO L225 Difference]: With dead ends: 315 [2019-11-23 22:26:22,230 INFO L226 Difference]: Without dead ends: 220 [2019-11-23 22:26:22,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:26:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-11-23 22:26:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2019-11-23 22:26:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-11-23 22:26:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 220 transitions. [2019-11-23 22:26:22,241 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 220 transitions. Word has length 207 [2019-11-23 22:26:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:22,244 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 220 transitions. [2019-11-23 22:26:22,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:26:22,244 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 220 transitions. [2019-11-23 22:26:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-23 22:26:22,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:22,247 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:22,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:22,452 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash 749071578, now seen corresponding path program 41 times [2019-11-23 22:26:22,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:22,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639921725] [2019-11-23 22:26:22,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2471 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2246 trivial. 0 not checked. [2019-11-23 22:26:22,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639921725] [2019-11-23 22:26:22,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742229708] [2019-11-23 22:26:22,735 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true