/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:44:17,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:44:17,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:44:17,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:44:17,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:44:17,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:44:17,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:44:17,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:44:17,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:44:17,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:44:17,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:44:17,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:44:17,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:44:17,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:44:17,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:44:17,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:44:17,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:44:17,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:44:17,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:44:17,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:44:17,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:44:17,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:44:17,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:44:17,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:44:17,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:44:17,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:44:17,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:44:17,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:44:17,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:44:17,258 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:44:17,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:44:17,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:44:17,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:44:17,262 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:44:17,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:44:17,263 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:44:17,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:44:17,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:44:17,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:44:17,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:44:17,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:44:17,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:44:17,264 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:44:17,264 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:44:17,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:44:17,265 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:44:17,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:44:17,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:44:17,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:44:17,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:44:17,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:44:17,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:44:17,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:44:17,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:44:17,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:44:17,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:44:17,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:44:17,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:44:17,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:44:17,502 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:44:17,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:44:17,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:44:17,521 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:44:17,522 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:44:17,523 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2019-11-23 20:44:17,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb2a8574/29acecf983ce4e359da61c41ee4b2d51/FLAGddea0cb23 [2019-11-23 20:44:18,030 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:44:18,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-2.i [2019-11-23 20:44:18,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb2a8574/29acecf983ce4e359da61c41ee4b2d51/FLAGddea0cb23 [2019-11-23 20:44:18,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb2a8574/29acecf983ce4e359da61c41ee4b2d51 [2019-11-23 20:44:18,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:44:18,427 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:44:18,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:44:18,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:44:18,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:44:18,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca6dfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18, skipping insertion in model container [2019-11-23 20:44:18,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:44:18,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:44:18,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:44:18,660 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:44:18,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:44:18,693 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:44:18,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18 WrapperNode [2019-11-23 20:44:18,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:44:18,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:44:18,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:44:18,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:44:18,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:44:18,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:44:18,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:44:18,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:44:18,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (1/1) ... [2019-11-23 20:44:18,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:44:18,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:44:18,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:44:18,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:44:18,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:44:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:44:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:44:18,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:44:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:44:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:44:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:44:19,175 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:44:19,175 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:44:19,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:44:19 BoogieIcfgContainer [2019-11-23 20:44:19,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:44:19,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:44:19,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:44:19,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:44:19,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:44:18" (1/3) ... [2019-11-23 20:44:19,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701db273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:44:19, skipping insertion in model container [2019-11-23 20:44:19,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:18" (2/3) ... [2019-11-23 20:44:19,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701db273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:44:19, skipping insertion in model container [2019-11-23 20:44:19,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:44:19" (3/3) ... [2019-11-23 20:44:19,185 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2019-11-23 20:44:19,195 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:44:19,203 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:44:19,218 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:44:19,271 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:44:19,271 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:44:19,271 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:44:19,272 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:44:19,272 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:44:19,272 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:44:19,272 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:44:19,272 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:44:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 20:44:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:44:19,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:19,291 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:19,292 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:19,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2019-11-23 20:44:19,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:19,304 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40360501] [2019-11-23 20:44:19,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:44:19,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40360501] [2019-11-23 20:44:19,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:19,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:44:19,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656236539] [2019-11-23 20:44:19,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:44:19,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:19,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:44:19,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:44:19,444 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-23 20:44:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:19,463 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2019-11-23 20:44:19,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:44:19,465 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:44:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:19,475 INFO L225 Difference]: With dead ends: 36 [2019-11-23 20:44:19,475 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:44:19,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:44:19,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:44:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 20:44:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:44:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 20:44:19,515 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2019-11-23 20:44:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:19,515 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 20:44:19,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:44:19,516 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 20:44:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:44:19,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:19,516 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:19,517 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2019-11-23 20:44:19,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:19,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563384118] [2019-11-23 20:44:19,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:44:19,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563384118] [2019-11-23 20:44:19,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:19,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:44:19,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271452529] [2019-11-23 20:44:19,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:44:19,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:19,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:44:19,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:44:19,579 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2019-11-23 20:44:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:19,648 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-23 20:44:19,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:44:19,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:44:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:19,650 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:44:19,650 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:44:19,651 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:44:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:44:19,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-11-23 20:44:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:44:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 20:44:19,658 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2019-11-23 20:44:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:19,658 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 20:44:19,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:44:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 20:44:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:44:19,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:19,659 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:19,660 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:19,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:19,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2019-11-23 20:44:19,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:19,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142753524] [2019-11-23 20:44:19,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:44:19,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142753524] [2019-11-23 20:44:19,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759003604] [2019-11-23 20:44:19,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:19,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:19,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:44:19,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:19,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:44:19,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955553005] [2019-11-23 20:44:19,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:44:19,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:19,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:44:19,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:44:19,852 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2019-11-23 20:44:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:19,954 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2019-11-23 20:44:19,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:44:19,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-23 20:44:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:19,957 INFO L225 Difference]: With dead ends: 39 [2019-11-23 20:44:19,957 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:44:19,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:44:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:44:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2019-11-23 20:44:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:44:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-23 20:44:19,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2019-11-23 20:44:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:19,968 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-23 20:44:19,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:44:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-23 20:44:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:44:19,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:19,971 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:20,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:20,183 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:20,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2030845279, now seen corresponding path program 2 times [2019-11-23 20:44:20,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:20,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333025411] [2019-11-23 20:44:20,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:44:20,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333025411] [2019-11-23 20:44:20,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148586241] [2019-11-23 20:44:20,268 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:20,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:44:20,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:20,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:44:20,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:44:20,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:20,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:44:20,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438353163] [2019-11-23 20:44:20,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:44:20,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:20,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:44:20,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:44:20,362 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 6 states. [2019-11-23 20:44:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:20,443 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2019-11-23 20:44:20,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:44:20,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-23 20:44:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:20,445 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:44:20,445 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:44:20,446 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:44:20,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:44:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-11-23 20:44:20,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:44:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-23 20:44:20,451 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 20 [2019-11-23 20:44:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:20,451 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-23 20:44:20,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:44:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-23 20:44:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:44:20,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:20,453 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:20,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:20,656 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:20,657 INFO L82 PathProgramCache]: Analyzing trace with hash -224231843, now seen corresponding path program 3 times [2019-11-23 20:44:20,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:20,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112292816] [2019-11-23 20:44:20,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:44:20,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112292816] [2019-11-23 20:44:20,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263607070] [2019-11-23 20:44:20,784 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:20,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:44:20,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:20,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:44:20,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:44:20,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:20,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:44:20,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86091428] [2019-11-23 20:44:20,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:44:20,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:20,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:44:20,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:44:20,869 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 7 states. [2019-11-23 20:44:20,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:20,934 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-11-23 20:44:20,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:44:20,934 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-23 20:44:20,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:20,935 INFO L225 Difference]: With dead ends: 55 [2019-11-23 20:44:20,935 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:44:20,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:44:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:44:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-23 20:44:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:44:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-23 20:44:20,942 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 25 [2019-11-23 20:44:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:20,942 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-23 20:44:20,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:44:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-23 20:44:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:44:20,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:20,944 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:21,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:21,145 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:21,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:21,146 INFO L82 PathProgramCache]: Analyzing trace with hash -736833947, now seen corresponding path program 4 times [2019-11-23 20:44:21,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:21,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063292543] [2019-11-23 20:44:21,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:44:21,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063292543] [2019-11-23 20:44:21,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992011608] [2019-11-23 20:44:21,258 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:21,305 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:44:21,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:21,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:44:21,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:44:21,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:21,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:44:21,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508935706] [2019-11-23 20:44:21,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:44:21,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:44:21,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:44:21,326 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 8 states. [2019-11-23 20:44:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:21,413 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2019-11-23 20:44:21,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:44:21,414 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-23 20:44:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:21,415 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:44:21,415 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:44:21,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:44:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:44:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-11-23 20:44:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:44:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-11-23 20:44:21,430 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 30 [2019-11-23 20:44:21,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:21,430 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-11-23 20:44:21,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:44:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-11-23 20:44:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:44:21,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:21,431 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:21,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:21,632 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:21,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1407538841, now seen corresponding path program 5 times [2019-11-23 20:44:21,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:21,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880849777] [2019-11-23 20:44:21,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:44:21,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880849777] [2019-11-23 20:44:21,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612898497] [2019-11-23 20:44:21,729 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:21,916 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:44:21,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:21,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:44:21,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:44:21,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:21,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:44:21,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609044929] [2019-11-23 20:44:21,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:44:21,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:21,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:44:21,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:44:21,942 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2019-11-23 20:44:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:22,040 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-11-23 20:44:22,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:44:22,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-11-23 20:44:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:22,042 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:44:22,042 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:44:22,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:44:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:44:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2019-11-23 20:44:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:44:22,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-11-23 20:44:22,054 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 35 [2019-11-23 20:44:22,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:22,054 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-11-23 20:44:22,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:44:22,054 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-11-23 20:44:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:44:22,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:22,056 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:22,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:22,267 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash 968499753, now seen corresponding path program 6 times [2019-11-23 20:44:22,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:22,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46082623] [2019-11-23 20:44:22,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:44:22,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46082623] [2019-11-23 20:44:22,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597394563] [2019-11-23 20:44:22,382 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:22,690 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:44:22,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:22,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:44:22,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:44:22,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:22,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:44:22,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94260731] [2019-11-23 20:44:22,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:44:22,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:44:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:44:22,738 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 10 states. [2019-11-23 20:44:22,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:22,848 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2019-11-23 20:44:22,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:44:22,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-11-23 20:44:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:22,849 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:44:22,849 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:44:22,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:44:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:44:22,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-23 20:44:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:44:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2019-11-23 20:44:22,856 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 40 [2019-11-23 20:44:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:22,856 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2019-11-23 20:44:22,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:44:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2019-11-23 20:44:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:44:22,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:22,858 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:23,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:23,071 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:23,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1016346923, now seen corresponding path program 7 times [2019-11-23 20:44:23,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:23,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926414096] [2019-11-23 20:44:23,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:44:23,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926414096] [2019-11-23 20:44:23,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034498360] [2019-11-23 20:44:23,206 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 20:44:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:23,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:44:23,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:44:23,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:23,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:44:23,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773347998] [2019-11-23 20:44:23,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:44:23,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:23,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:44:23,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:44:23,277 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 11 states. [2019-11-23 20:44:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:23,372 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2019-11-23 20:44:23,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:44:23,372 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2019-11-23 20:44:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:23,373 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:44:23,373 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:44:23,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:44:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:44:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-11-23 20:44:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:44:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2019-11-23 20:44:23,380 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 45 [2019-11-23 20:44:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:23,380 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2019-11-23 20:44:23,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:44:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2019-11-23 20:44:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:44:23,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:23,381 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:23,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:23,585 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1143734803, now seen corresponding path program 8 times [2019-11-23 20:44:23,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:23,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946834391] [2019-11-23 20:44:23,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:44:23,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946834391] [2019-11-23 20:44:23,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744423027] [2019-11-23 20:44:23,723 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:23,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:44:23,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:23,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:44:23,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:44:23,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:23,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:44:23,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990919971] [2019-11-23 20:44:23,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:44:23,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:44:23,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:44:23,823 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 12 states. [2019-11-23 20:44:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:23,959 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2019-11-23 20:44:23,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:44:23,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2019-11-23 20:44:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:23,961 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:44:23,961 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:44:23,963 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:44:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:44:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-11-23 20:44:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:44:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2019-11-23 20:44:23,969 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 50 [2019-11-23 20:44:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:23,969 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2019-11-23 20:44:23,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:44:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2019-11-23 20:44:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:44:23,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:23,971 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:24,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:24,180 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:24,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:24,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1908772625, now seen corresponding path program 9 times [2019-11-23 20:44:24,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:24,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416039417] [2019-11-23 20:44:24,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:44:24,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416039417] [2019-11-23 20:44:24,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633292586] [2019-11-23 20:44:24,315 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:27,651 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:44:27,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:27,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:44:27,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:44:27,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:27,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:44:27,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803107522] [2019-11-23 20:44:27,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:44:27,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:27,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:44:27,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:44:27,688 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 13 states. [2019-11-23 20:44:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:27,816 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2019-11-23 20:44:27,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:44:27,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2019-11-23 20:44:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:27,819 INFO L225 Difference]: With dead ends: 103 [2019-11-23 20:44:27,819 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:44:27,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:44:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:44:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2019-11-23 20:44:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:44:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2019-11-23 20:44:27,826 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 55 [2019-11-23 20:44:27,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:27,826 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2019-11-23 20:44:27,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:44:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2019-11-23 20:44:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:44:27,828 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:27,828 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:28,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:28,035 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash -967663183, now seen corresponding path program 10 times [2019-11-23 20:44:28,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:28,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985363436] [2019-11-23 20:44:28,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:44:28,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985363436] [2019-11-23 20:44:28,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980851005] [2019-11-23 20:44:28,172 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:28,295 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:44:28,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:28,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:44:28,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:44:28,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:28,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:44:28,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911778674] [2019-11-23 20:44:28,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:44:28,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:28,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:44:28,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:44:28,320 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 14 states. [2019-11-23 20:44:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:28,460 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2019-11-23 20:44:28,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:44:28,460 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2019-11-23 20:44:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:28,461 INFO L225 Difference]: With dead ends: 111 [2019-11-23 20:44:28,461 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:44:28,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:44:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:44:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2019-11-23 20:44:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:44:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2019-11-23 20:44:28,468 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 60 [2019-11-23 20:44:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:28,468 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2019-11-23 20:44:28,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:44:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2019-11-23 20:44:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:44:28,469 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:28,470 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:28,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:28,682 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:28,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2055049395, now seen corresponding path program 11 times [2019-11-23 20:44:28,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:28,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528784399] [2019-11-23 20:44:28,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:44:28,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528784399] [2019-11-23 20:44:28,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947268878] [2019-11-23 20:44:28,824 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:49,226 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:44:49,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:49,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:44:49,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:44:49,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:49,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:44:49,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047165961] [2019-11-23 20:44:49,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:44:49,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:44:49,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:44:49,265 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 15 states. [2019-11-23 20:44:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:49,412 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2019-11-23 20:44:49,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:44:49,413 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2019-11-23 20:44:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:49,414 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:44:49,414 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:44:49,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:44:49,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:44:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-11-23 20:44:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:44:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2019-11-23 20:44:49,421 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 65 [2019-11-23 20:44:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:49,422 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2019-11-23 20:44:49,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:44:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2019-11-23 20:44:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:44:49,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:49,423 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:49,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:49,637 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:49,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1898335605, now seen corresponding path program 12 times [2019-11-23 20:44:49,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:49,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393110798] [2019-11-23 20:44:49,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:44:49,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393110798] [2019-11-23 20:44:49,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069360619] [2019-11-23 20:44:49,811 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:45:06,036 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:45:06,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:45:06,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:45:06,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:45:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:45:06,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:45:06,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:45:06,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724523272] [2019-11-23 20:45:06,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:45:06,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:45:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:45:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:45:06,075 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 16 states. [2019-11-23 20:45:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:45:06,237 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2019-11-23 20:45:06,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:45:06,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2019-11-23 20:45:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:45:06,238 INFO L225 Difference]: With dead ends: 127 [2019-11-23 20:45:06,238 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:45:06,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:45:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:45:06,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2019-11-23 20:45:06,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:45:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2019-11-23 20:45:06,243 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 70 [2019-11-23 20:45:06,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:45:06,244 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2019-11-23 20:45:06,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:45:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2019-11-23 20:45:06,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:45:06,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:45:06,245 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:45:06,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:45:06,455 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:45:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:45:06,456 INFO L82 PathProgramCache]: Analyzing trace with hash -684578935, now seen corresponding path program 13 times [2019-11-23 20:45:06,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:45:06,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651983920] [2019-11-23 20:45:06,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:45:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:45:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:45:06,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651983920] [2019-11-23 20:45:06,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448754164] [2019-11-23 20:45:06,658 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:45:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:45:06,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:45:06,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:45:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:45:06,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:45:06,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:45:06,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091820800] [2019-11-23 20:45:06,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:45:06,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:45:06,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:45:06,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:45:06,740 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 17 states. [2019-11-23 20:45:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:45:06,909 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2019-11-23 20:45:06,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:45:06,909 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-11-23 20:45:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:45:06,910 INFO L225 Difference]: With dead ends: 135 [2019-11-23 20:45:06,910 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:45:06,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 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 20:45:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:45:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2019-11-23 20:45:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 20:45:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2019-11-23 20:45:06,916 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 75 [2019-11-23 20:45:06,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:45:06,917 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2019-11-23 20:45:06,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:45:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2019-11-23 20:45:06,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:45:06,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:45:06,918 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:45:07,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:45:07,133 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:45:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:45:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1002487495, now seen corresponding path program 14 times [2019-11-23 20:45:07,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:45:07,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139285468] [2019-11-23 20:45:07,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:45:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:45:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:45:07,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139285468] [2019-11-23 20:45:07,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865949788] [2019-11-23 20:45:07,333 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:45:07,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:45:07,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:45:07,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:45:07,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:45:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:45:07,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:45:07,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:45:07,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813991864] [2019-11-23 20:45:07,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:45:07,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:45:07,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:45:07,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:45:07,451 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 18 states. [2019-11-23 20:45:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:45:07,620 INFO L93 Difference]: Finished difference Result 143 states and 180 transitions. [2019-11-23 20:45:07,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:45:07,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2019-11-23 20:45:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:45:07,622 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:45:07,622 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:45:07,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:45:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:45:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2019-11-23 20:45:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:45:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2019-11-23 20:45:07,629 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 80 [2019-11-23 20:45:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:45:07,631 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2019-11-23 20:45:07,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:45:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2019-11-23 20:45:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:45:07,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:45:07,634 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:45:07,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:45:07,835 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:45:07,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:45:07,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1385924667, now seen corresponding path program 15 times [2019-11-23 20:45:07,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:45:07,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030303517] [2019-11-23 20:45:07,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:45:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:45:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:45:08,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030303517] [2019-11-23 20:45:08,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912937557] [2019-11-23 20:45:08,015 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