/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-crafted/bor1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:10:08,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:10:08,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:10:09,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:10:09,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:10:09,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:10:09,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:10:09,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:10:09,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:10:09,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:10:09,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:10:09,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:10:09,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:10:09,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:10:09,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:10:09,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:10:09,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:10:09,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:10:09,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:10:09,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:10:09,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:10:09,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:10:09,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:10:09,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:10:09,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:10:09,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:10:09,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:10:09,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:10:09,046 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 20:10:09,060 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:10:09,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:10:09,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:10:09,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:10:09,062 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:10:09,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:10:09,062 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:10:09,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:10:09,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:10:09,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:10:09,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:10:09,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:10:09,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:10:09,064 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:10:09,064 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:10:09,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:10:09,064 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:10:09,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:10:09,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:10:09,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:10:09,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:10:09,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:10:09,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:10:09,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:10:09,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:10:09,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:10:09,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:10:09,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:10:09,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:10:09,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:10:09,350 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:10:09,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:10:09,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:10:09,369 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:10:09,369 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:10:09,370 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor1.i [2019-11-23 20:10:09,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea44c620/16736e03ed1149ae84958d7ca335ebcc/FLAGd2127a03c [2019-11-23 20:10:09,893 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:10:09,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor1.i [2019-11-23 20:10:09,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea44c620/16736e03ed1149ae84958d7ca335ebcc/FLAGd2127a03c [2019-11-23 20:10:10,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea44c620/16736e03ed1149ae84958d7ca335ebcc [2019-11-23 20:10:10,328 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:10:10,329 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:10:10,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:10:10,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:10:10,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:10:10,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db4663a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10, skipping insertion in model container [2019-11-23 20:10:10,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:10:10,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:10:10,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:10:10,621 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:10:10,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:10:10,796 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:10:10,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10 WrapperNode [2019-11-23 20:10:10,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:10:10,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:10:10,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:10:10,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:10:10,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:10:10,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:10:10,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:10:10,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:10:10,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:10:10,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:10:10,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:10:10,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:10:10,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (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 20:10:10,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:10:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:10:10,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:10:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:10:10,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:10:10,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:10:11,260 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:10:11,261 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:10:11,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:10:11 BoogieIcfgContainer [2019-11-23 20:10:11,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:10:11,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:10:11,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:10:11,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:10:11,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:10:10" (1/3) ... [2019-11-23 20:10:11,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556953e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:10:11, skipping insertion in model container [2019-11-23 20:10:11,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (2/3) ... [2019-11-23 20:10:11,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556953e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:10:11, skipping insertion in model container [2019-11-23 20:10:11,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:10:11" (3/3) ... [2019-11-23 20:10:11,281 INFO L109 eAbstractionObserver]: Analyzing ICFG bor1.i [2019-11-23 20:10:11,294 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:10:11,306 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:10:11,327 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:10:11,350 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:10:11,350 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:10:11,351 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:10:11,351 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:10:11,351 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:10:11,351 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:10:11,351 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:10:11,351 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:10:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:10:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:10:11,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,370 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:11,370 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:10:11,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142905633] [2019-11-23 20:10:11,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,559 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 20:10:11,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142905633] [2019-11-23 20:10:11,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:10:11,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:10:11,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107817018] [2019-11-23 20:10:11,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:10:11,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:10:11,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,580 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:10:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,619 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:10:11,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:10:11,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:10:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,630 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:10:11,630 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:10:11,634 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 20:10:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:10:11,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:10:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:10:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:10:11,670 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:10:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,671 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:10:11,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:10:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:10:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:10:11,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,672 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:11,673 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:10:11,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058710517] [2019-11-23 20:10:11,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:10:11,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058710517] [2019-11-23 20:10:11,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:10:11,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:10:11,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367777497] [2019-11-23 20:10:11,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:10:11,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:10:11,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,733 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:10:11,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,794 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:10:11,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:10:11,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:10:11,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,796 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:10:11,796 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:10:11,798 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 20:10:11,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:10:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:10:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:10:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:10:11,805 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:10:11,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,805 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:10:11,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:10:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:10:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:10:11,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,807 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:11,807 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:10:11,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498985007] [2019-11-23 20:10:11,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:10:11,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498985007] [2019-11-23 20:10:11,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:10:11,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:10:11,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702837823] [2019-11-23 20:10:11,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:10:11,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:10:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,898 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:10:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,927 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:10:11,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:10:11,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:10:11,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,929 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:10:11,929 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:10:11,929 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 20:10:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:10:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:10:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:10:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:10:11,940 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:10:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,941 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:10:11,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:10:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:10:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:10:11,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,943 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:11,943 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:10:11,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491638828] [2019-11-23 20:10:11,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:10:12,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491638828] [2019-11-23 20:10:12,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878601663] [2019-11-23 20:10:12,055 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 20:10:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:12,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:10:12,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:10:12,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:12,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:10:12,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381183878] [2019-11-23 20:10:12,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:10:12,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:12,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:10:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:10:12,185 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:10:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:12,220 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:10:12,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:10:12,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:10:12,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:12,224 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:10:12,224 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:10:12,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:10:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:10:12,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:10:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:10:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:10:12,239 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:10:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:12,242 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:10:12,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:10:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:10:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:10:12,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:12,243 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:12,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:12,449 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:12,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:12,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:10:12,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:12,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244188432] [2019-11-23 20:10:12,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:10:12,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244188432] [2019-11-23 20:10:12,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026296345] [2019-11-23 20:10:12,563 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 20:10:12,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:12,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:12,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:10:12,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:10:12,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:12,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:10:12,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520191519] [2019-11-23 20:10:12,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:10:12,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:12,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:10:12,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:10:12,681 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:10:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:12,746 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:10:12,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:10:12,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:10:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:12,752 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:10:12,752 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:10:12,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:10:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:10:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:10:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:10:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:10:12,763 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:10:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:12,763 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:10:12,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:10:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:10:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:10:12,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:12,764 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:12,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:12,971 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:12,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:12,972 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:10:12,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:12,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026999199] [2019-11-23 20:10:12,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:10:13,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026999199] [2019-11-23 20:10:13,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889854838] [2019-11-23 20:10:13,046 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 20:10:13,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:10:13,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:13,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:10:13,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:10:13,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:13,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:10:13,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307695345] [2019-11-23 20:10:13,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:10:13,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:13,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:10:13,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:10:13,142 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:10:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:13,241 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:10:13,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:10:13,242 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:10:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:13,243 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:10:13,243 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:10:13,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:10:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:10:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:10:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:10:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:10:13,250 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:10:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:13,250 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:10:13,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:10:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:10:13,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:10:13,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:13,251 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:13,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:13,453 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:10:13,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:13,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316628088] [2019-11-23 20:10:13,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:10:13,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316628088] [2019-11-23 20:10:13,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998575409] [2019-11-23 20:10:13,541 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 20:10:13,599 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:13,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:13,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:10:13,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:10:13,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:13,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:10:13,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863432256] [2019-11-23 20:10:13,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:10:13,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:13,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:10:13,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:10:13,642 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:10:13,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:13,791 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:10:13,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:10:13,793 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:10:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:13,794 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:10:13,794 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:10:13,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:10:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:10:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:10:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:10:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:10:13,809 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:10:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:13,811 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:10:13,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:10:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:10:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:10:13,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:13,814 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:14,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:14,018 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:14,019 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:10:14,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:14,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230180120] [2019-11-23 20:10:14,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:10:14,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230180120] [2019-11-23 20:10:14,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009963236] [2019-11-23 20:10:14,148 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 20:10:14,235 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:10:14,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:14,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:10:14,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:10:14,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:14,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:10:14,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587057174] [2019-11-23 20:10:14,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:10:14,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:14,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:10:14,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:14,292 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:10:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:14,419 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:10:14,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:10:14,419 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:10:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:14,420 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:10:14,420 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:10:14,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:10:14,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:10:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:10:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:10:14,428 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:10:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:14,428 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:10:14,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:10:14,428 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:10:14,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:10:14,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:14,429 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:14,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:14,634 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:14,635 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:10:14,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:14,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450345461] [2019-11-23 20:10:14,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:10:14,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450345461] [2019-11-23 20:10:14,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221896776] [2019-11-23 20:10:14,736 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 20:10:14,819 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:10:14,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:14,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:10:14,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:10:14,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:14,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:10:14,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068648695] [2019-11-23 20:10:14,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:10:14,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:10:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:14,869 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:10:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:14,931 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:10:14,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:10:14,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:10:14,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:14,932 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:10:14,933 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:10:14,933 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:10:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:10:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:10:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:10:14,949 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:10:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:14,949 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:10:14,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:10:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:10:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:10:14,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:14,951 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:15,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:15,152 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:10:15,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:15,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581238573] [2019-11-23 20:10:15,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:10:15,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581238573] [2019-11-23 20:10:15,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239807949] [2019-11-23 20:10:15,256 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 20:10:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:15,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:15,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:10:15,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:15,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:10:15,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091193907] [2019-11-23 20:10:15,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:10:15,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:10:15,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:10:15,379 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:10:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:15,419 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:10:15,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:10:15,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:10:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:15,420 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:10:15,420 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:10:15,422 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:10:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:10:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:10:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:10:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:10:15,435 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:10:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:15,435 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:10:15,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:10:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:10:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:10:15,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:15,440 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:15,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:15,653 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:10:15,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:15,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079345478] [2019-11-23 20:10:15,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:10:15,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079345478] [2019-11-23 20:10:15,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576601920] [2019-11-23 20:10:15,763 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:10:15,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:15,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:15,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:10:15,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:10:15,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:15,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:10:15,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981606804] [2019-11-23 20:10:15,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:10:15,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:10:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:15,887 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:10:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:15,927 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:10:15,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:10:15,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:10:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:15,929 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:10:15,929 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:10:15,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:10:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:10:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:10:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:10:15,935 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:10:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:15,936 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:10:15,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:10:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:10:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:10:15,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:15,937 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:16,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:16,141 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:16,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:10:16,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:16,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902775913] [2019-11-23 20:10:16,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:10:16,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902775913] [2019-11-23 20:10:16,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241648707] [2019-11-23 20:10:16,274 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 20:10:16,336 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:10:16,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:16,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:10:16,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 20:10:16,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:16,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:10:16,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226647349] [2019-11-23 20:10:16,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:10:16,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:16,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:10:16,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:10:16,390 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:10:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:16,465 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:10:16,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:10:16,465 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:10:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:16,466 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:10:16,466 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:10:16,467 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:10:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:10:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:10:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:10:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:10:16,473 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:10:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:16,474 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:10:16,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:10:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:10:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:10:16,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:16,475 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:16,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:16,687 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:16,687 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:10:16,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:16,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776778567] [2019-11-23 20:10:16,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:10:16,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776778567] [2019-11-23 20:10:16,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29986121] [2019-11-23 20:10:16,841 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 20:10:16,921 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:16,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:16,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:10:16,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:10:16,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:16,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:10:16,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629983032] [2019-11-23 20:10:16,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:10:16,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:16,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:10:16,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:10:16,958 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:10:17,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:17,019 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:10:17,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:10:17,020 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:10:17,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:17,021 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:10:17,021 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:10:17,026 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:10:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:10:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:10:17,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:10:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:10:17,040 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:10:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:17,040 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:10:17,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:10:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:10:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:10:17,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:17,041 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:17,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:17,246 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:17,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:10:17,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:17,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652483500] [2019-11-23 20:10:17,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:10:17,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652483500] [2019-11-23 20:10:17,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057451108] [2019-11-23 20:10:17,425 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 20:10:17,630 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:10:17,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:17,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:10:17,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:10:17,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:17,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:10:17,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249420567] [2019-11-23 20:10:17,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:10:17,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:17,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:10:17,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:10:17,702 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 20:10:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:17,797 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2019-11-23 20:10:17,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:10:17,798 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 20:10:17,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:17,798 INFO L225 Difference]: With dead ends: 125 [2019-11-23 20:10:17,799 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:10:17,799 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:10:17,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:10:17,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2019-11-23 20:10:17,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:10:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2019-11-23 20:10:17,804 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2019-11-23 20:10:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:17,805 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2019-11-23 20:10:17,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:10:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2019-11-23 20:10:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:10:17,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:17,806 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:18,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:18,010 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 12 times [2019-11-23 20:10:18,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:18,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868374774] [2019-11-23 20:10:18,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:10:18,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868374774] [2019-11-23 20:10:18,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419759745] [2019-11-23 20:10:18,160 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 20:10:18,382 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:10:18,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:18,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:10:18,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2019-11-23 20:10:18,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:18,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:10:18,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095406142] [2019-11-23 20:10:18,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:10:18,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:18,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:10:18,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:10:18,460 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 20 states. [2019-11-23 20:10:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:18,609 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2019-11-23 20:10:18,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:10:18,610 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2019-11-23 20:10:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:18,611 INFO L225 Difference]: With dead ends: 137 [2019-11-23 20:10:18,611 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:10:18,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:10:18,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:10:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2019-11-23 20:10:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:10:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 20:10:18,617 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 75 [2019-11-23 20:10:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:18,617 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 20:10:18,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:10:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 20:10:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:10:18,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:18,619 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:18,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:18,831 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:18,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 20:10:18,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:18,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522155352] [2019-11-23 20:10:18,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:10:19,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522155352] [2019-11-23 20:10:19,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627599269] [2019-11-23 20:10:19,059 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 20:10:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:19,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:10:19,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:10:19,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:19,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:10:19,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217902304] [2019-11-23 20:10:19,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:10:19,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:19,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:10:19,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:10:19,178 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 20:10:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:19,240 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 20:10:19,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:10:19,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 20:10:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:19,241 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:10:19,242 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:10:19,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:10:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:10:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:10:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:10:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 20:10:19,248 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 20:10:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:19,248 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 20:10:19,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:10:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 20:10:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:10:19,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:19,250 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:19,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:19,462 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:19,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 20:10:19,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:19,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089609196] [2019-11-23 20:10:19,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:10:19,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089609196] [2019-11-23 20:10:19,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304435279] [2019-11-23 20:10:19,623 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 20:10:19,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:19,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:19,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:10:19,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:10:19,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:19,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:10:19,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338027926] [2019-11-23 20:10:19,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:10:19,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:19,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:10:19,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:10:19,751 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 20:10:19,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:19,822 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 20:10:19,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:10:19,823 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 20:10:19,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:19,824 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:10:19,824 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:10:19,825 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:10:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:10:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:10:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:10:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 20:10:19,829 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 20:10:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:19,829 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 20:10:19,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:10:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 20:10:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:10:19,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:19,830 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:20,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:20,043 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:20,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:20,043 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 20:10:20,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:20,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137886372] [2019-11-23 20:10:20,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:10:20,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137886372] [2019-11-23 20:10:20,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617546359] [2019-11-23 20:10:20,228 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:20,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:10:20,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:20,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:20,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:10:20,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:20,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:10:20,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973417708] [2019-11-23 20:10:20,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:10:20,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:20,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:10:20,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:10:20,425 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 20:10:20,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:20,520 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 20:10:20,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:10:20,521 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 20:10:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:20,522 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:10:20,522 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:10:20,523 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:10:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:10:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 20:10:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:10:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:10:20,527 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 20:10:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:20,527 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:10:20,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:10:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:10:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:10:20,528 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:20,528 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:20,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:20,732 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:20,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:20,733 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 20:10:20,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:20,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089000978] [2019-11-23 20:10:20,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:10:20,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089000978] [2019-11-23 20:10:20,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486421028] [2019-11-23 20:10:20,945 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:21,013 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:21,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:21,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:10:21,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 20:10:21,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:21,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:10:21,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76407346] [2019-11-23 20:10:21,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:10:21,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:21,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:10:21,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:10:21,133 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 20:10:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:21,330 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 20:10:21,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:10:21,331 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 20:10:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:21,332 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:10:21,332 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:10:21,333 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:10:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:10:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 20:10:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:10:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 20:10:21,338 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 20:10:21,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:21,338 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 20:10:21,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:10:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 20:10:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:10:21,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:21,339 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:21,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:21,543 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:21,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:21,543 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 20:10:21,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:21,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574819205] [2019-11-23 20:10:21,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:10:21,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574819205] [2019-11-23 20:10:21,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369422929] [2019-11-23 20:10:21,767 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:22,270 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:10:22,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:22,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:10:22,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 20:10:22,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:22,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:10:22,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196448921] [2019-11-23 20:10:22,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:10:22,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:10:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:10:22,361 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 20:10:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:22,583 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 20:10:22,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:10:22,584 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 20:10:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:22,585 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:10:22,585 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:10:22,586 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:10:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:10:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 20:10:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:10:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 20:10:22,591 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 20:10:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:22,591 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 20:10:22,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:10:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 20:10:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:10:22,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:22,592 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:22,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:22,797 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:22,798 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 20:10:22,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:22,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181453954] [2019-11-23 20:10:22,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:10:23,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181453954] [2019-11-23 20:10:23,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695745797] [2019-11-23 20:10:23,036 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:23,712 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:10:23,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:23,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:10:23,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 20:10:23,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:23,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:10:23,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46425744] [2019-11-23 20:10:23,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:10:23,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:10:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:10:23,861 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 20:10:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:24,029 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 20:10:24,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:10:24,030 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 20:10:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:24,031 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:10:24,031 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:10:24,031 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:10:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:10:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 20:10:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:10:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:10:24,034 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 20:10:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:24,035 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:10:24,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:10:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:10:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:10:24,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:24,036 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:24,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:24,241 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 20:10:24,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:24,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320887773] [2019-11-23 20:10:24,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:10:24,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320887773] [2019-11-23 20:10:24,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46868962] [2019-11-23 20:10:24,491 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:24,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:10:24,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:10:24,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:24,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:10:24,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030814596] [2019-11-23 20:10:24,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:10:24,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:24,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:10:24,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:10:24,597 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 20:10:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:24,667 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 20:10:24,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:10:24,668 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 20:10:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:24,669 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:10:24,669 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:10:24,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:10:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:10:24,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:10:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:10:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:10:24,674 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:10:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:24,674 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:10:24,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:10:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:10:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:10:24,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:24,675 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:24,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:24,879 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 20:10:24,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:24,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262804413] [2019-11-23 20:10:24,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:10:25,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262804413] [2019-11-23 20:10:25,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452168634] [2019-11-23 20:10:25,166 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:25,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:25,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:25,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:10:25,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:10:25,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:25,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:10:25,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601610263] [2019-11-23 20:10:25,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:10:25,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:10:25,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:10:25,287 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 20:10:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:25,364 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 20:10:25,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:10:25,366 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 20:10:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:25,367 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:10:25,367 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:10:25,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:10:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:10:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:10:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:10:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 20:10:25,372 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 20:10:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:25,372 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 20:10:25,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:10:25,373 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 20:10:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:10:25,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:25,373 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:25,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:25,577 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:25,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 20:10:25,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:25,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845287747] [2019-11-23 20:10:25,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:10:25,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845287747] [2019-11-23 20:10:25,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535573340] [2019-11-23 20:10:25,872 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:26,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:10:26,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:26,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:26,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-23 20:10:26,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:26,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-11-23 20:10:26,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503793564] [2019-11-23 20:10:26,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:10:26,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:26,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:10:26,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:10:26,299 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 32 states. [2019-11-23 20:10:26,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:26,535 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2019-11-23 20:10:26,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:10:26,536 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 115 [2019-11-23 20:10:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:26,536 INFO L225 Difference]: With dead ends: 199 [2019-11-23 20:10:26,536 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:10:26,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:10:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:10:26,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2019-11-23 20:10:26,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:10:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2019-11-23 20:10:26,545 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2019-11-23 20:10:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:26,545 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2019-11-23 20:10:26,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:10:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2019-11-23 20:10:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:10:26,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:26,548 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:26,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:26,753 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:26,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1756079898, now seen corresponding path program 22 times [2019-11-23 20:10:26,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:26,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872853973] [2019-11-23 20:10:26,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:10:27,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872853973] [2019-11-23 20:10:27,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624873684] [2019-11-23 20:10:27,106 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:27,211 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:27,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:27,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:10:27,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:10:27,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:27,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:10:27,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325574272] [2019-11-23 20:10:27,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:10:27,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:27,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:10:27,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:10:27,257 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 26 states. [2019-11-23 20:10:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:27,337 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2019-11-23 20:10:27,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:10:27,338 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-11-23 20:10:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:27,339 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:10:27,339 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:10:27,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:10:27,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:10:27,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-11-23 20:10:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 20:10:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 20:10:27,344 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2019-11-23 20:10:27,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:27,344 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 20:10:27,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:10:27,344 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 20:10:27,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:10:27,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:27,345 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:27,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:27,549 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:27,550 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 23 times [2019-11-23 20:10:27,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:27,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674185133] [2019-11-23 20:10:27,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:10:27,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674185133] [2019-11-23 20:10:27,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097101126] [2019-11-23 20:10:27,984 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:30,365 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:10:30,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:30,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:10:30,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-23 20:10:30,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:30,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2019-11-23 20:10:30,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580892559] [2019-11-23 20:10:30,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:10:30,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:30,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:10:30,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:30,546 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 35 states. [2019-11-23 20:10:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:30,781 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2019-11-23 20:10:30,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:10:30,781 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 125 [2019-11-23 20:10:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:30,783 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:10:30,783 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:10:30,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:10:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2019-11-23 20:10:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:10:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:10:30,789 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2019-11-23 20:10:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:30,790 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:10:30,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:10:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:10:30,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:10:30,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:30,791 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:30,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:30,997 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:30,998 INFO L82 PathProgramCache]: Analyzing trace with hash 613383828, now seen corresponding path program 24 times [2019-11-23 20:10:30,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:30,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035710068] [2019-11-23 20:10:30,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-11-23 20:10:31,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035710068] [2019-11-23 20:10:31,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358342332] [2019-11-23 20:10:31,578 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:32,788 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:10:32,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:32,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:32,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2019-11-23 20:10:32,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:32,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-23 20:10:32,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886093809] [2019-11-23 20:10:32,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:10:32,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:32,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:10:32,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:32,931 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 35 states. [2019-11-23 20:10:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:33,113 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2019-11-23 20:10:33,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:10:33,113 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2019-11-23 20:10:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:33,114 INFO L225 Difference]: With dead ends: 223 [2019-11-23 20:10:33,114 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:10:33,115 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:10:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-11-23 20:10:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:10:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 20:10:33,119 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 133 [2019-11-23 20:10:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:33,119 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 20:10:33,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:10:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 20:10:33,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:10:33,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:33,120 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:33,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:33,325 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:33,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2095840464, now seen corresponding path program 25 times [2019-11-23 20:10:33,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:33,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945002840] [2019-11-23 20:10:33,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:10:33,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945002840] [2019-11-23 20:10:33,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699947945] [2019-11-23 20:10:33,715 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:33,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:10:33,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:10:33,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:33,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:10:33,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109362549] [2019-11-23 20:10:33,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:10:33,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:33,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:10:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:10:33,832 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 29 states. [2019-11-23 20:10:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:33,936 INFO L93 Difference]: Finished difference Result 226 states and 234 transitions. [2019-11-23 20:10:33,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:10:33,937 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2019-11-23 20:10:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:33,938 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:10:33,938 INFO L226 Difference]: Without dead ends: 141 [2019-11-23 20:10:33,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:10:33,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-23 20:10:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-23 20:10:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:10:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2019-11-23 20:10:33,943 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2019-11-23 20:10:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:33,943 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2019-11-23 20:10:33,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:10:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2019-11-23 20:10:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 20:10:33,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:33,944 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:34,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:34,147 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:34,148 INFO L82 PathProgramCache]: Analyzing trace with hash -624080370, now seen corresponding path program 26 times [2019-11-23 20:10:34,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:34,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276993230] [2019-11-23 20:10:34,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:10:34,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276993230] [2019-11-23 20:10:34,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744373871] [2019-11-23 20:10:34,718 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:34,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:34,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:34,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:10:34,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:10:34,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:34,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:10:34,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244989937] [2019-11-23 20:10:34,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:10:34,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:34,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:10:34,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:10:34,834 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 30 states. [2019-11-23 20:10:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:34,942 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2019-11-23 20:10:34,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:10:34,943 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2019-11-23 20:10:34,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:34,944 INFO L225 Difference]: With dead ends: 228 [2019-11-23 20:10:34,944 INFO L226 Difference]: Without dead ends: 143 [2019-11-23 20:10:34,945 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:10:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-23 20:10:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-11-23 20:10:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:10:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2019-11-23 20:10:34,951 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2019-11-23 20:10:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:34,951 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2019-11-23 20:10:34,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:10:34,951 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2019-11-23 20:10:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 20:10:34,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:34,953 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:35,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:35,157 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:35,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1167081420, now seen corresponding path program 27 times [2019-11-23 20:10:35,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:35,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624888855] [2019-11-23 20:10:35,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:10:35,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624888855] [2019-11-23 20:10:35,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934056299] [2019-11-23 20:10:35,686 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:35,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:10:35,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:35,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:10:35,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-11-23 20:10:36,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:36,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2019-11-23 20:10:36,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497289343] [2019-11-23 20:10:36,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:10:36,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:36,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:10:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:10:36,106 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 39 states. [2019-11-23 20:10:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:36,331 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2019-11-23 20:10:36,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:10:36,331 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 141 [2019-11-23 20:10:36,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:36,333 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:10:36,333 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:10:36,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:10:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:10:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2019-11-23 20:10:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:10:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 20:10:36,341 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 141 [2019-11-23 20:10:36,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:36,342 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 20:10:36,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:10:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 20:10:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:10:36,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:36,344 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:36,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:36,551 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:36,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1782074872, now seen corresponding path program 28 times [2019-11-23 20:10:36,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:36,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234666235] [2019-11-23 20:10:36,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:10:37,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234666235] [2019-11-23 20:10:37,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472284406] [2019-11-23 20:10:37,158 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:37,243 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:37,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:37,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:10:37,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:10:37,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:37,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:10:37,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471484914] [2019-11-23 20:10:37,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:10:37,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:37,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:10:37,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:10:37,272 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 32 states. [2019-11-23 20:10:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:37,375 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2019-11-23 20:10:37,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:10:37,377 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2019-11-23 20:10:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:37,378 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:10:37,378 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:10:37,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:10:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:10:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 20:10:37,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:10:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 20:10:37,383 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 20:10:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:37,383 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 20:10:37,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:10:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 20:10:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:10:37,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:37,384 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:37,588 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:37,588 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:37,589 INFO L82 PathProgramCache]: Analyzing trace with hash 10412358, now seen corresponding path program 29 times [2019-11-23 20:10:37,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:37,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032360057] [2019-11-23 20:10:37,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:10:38,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032360057] [2019-11-23 20:10:38,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070447133] [2019-11-23 20:10:38,071 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:40,102 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:10:40,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:40,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:10:40,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2019-11-23 20:10:40,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:40,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-23 20:10:40,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30395473] [2019-11-23 20:10:40,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:10:40,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:40,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:10:40,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:10:40,306 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 42 states. [2019-11-23 20:10:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:40,533 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2019-11-23 20:10:40,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:10:40,533 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 147 [2019-11-23 20:10:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:40,534 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:10:40,534 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:10:40,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:10:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:10:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2019-11-23 20:10:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 20:10:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 20:10:40,540 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-11-23 20:10:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:40,540 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 20:10:40,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:10:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 20:10:40,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:10:40,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:40,541 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:40,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:40,744 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:40,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:40,745 INFO L82 PathProgramCache]: Analyzing trace with hash 300865538, now seen corresponding path program 30 times [2019-11-23 20:10:40,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:40,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63473098] [2019-11-23 20:10:40,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:10:41,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63473098] [2019-11-23 20:10:41,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397761217] [2019-11-23 20:10:41,208 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:42,462 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:10:42,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:42,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:10:42,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-11-23 20:10:42,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:42,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-23 20:10:42,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118262557] [2019-11-23 20:10:42,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:10:42,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:10:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:10:42,664 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 43 states. [2019-11-23 20:10:42,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:42,864 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2019-11-23 20:10:42,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:10:42,865 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 155 [2019-11-23 20:10:42,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:42,866 INFO L225 Difference]: With dead ends: 255 [2019-11-23 20:10:42,866 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:10:42,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:10:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:10:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 20:10:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:10:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 20:10:42,873 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 155 [2019-11-23 20:10:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:42,873 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 20:10:42,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:10:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 20:10:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:10:42,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:42,875 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:43,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:43,081 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1309958206, now seen corresponding path program 31 times [2019-11-23 20:10:43,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:43,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021677613] [2019-11-23 20:10:43,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:10:43,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021677613] [2019-11-23 20:10:43,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152461386] [2019-11-23 20:10:43,582 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:43,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:10:43,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:10:43,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:43,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:10:43,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235396285] [2019-11-23 20:10:43,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:10:43,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:43,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:10:43,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:43,752 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 35 states. [2019-11-23 20:10:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:43,865 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 20:10:43,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:10:43,866 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 159 [2019-11-23 20:10:43,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:43,867 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:10:43,867 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:10:43,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:10:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:10:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:10:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:10:43,872 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 20:10:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:43,872 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:10:43,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:10:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:10:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:10:43,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:43,873 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:44,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:44,077 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:44,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:44,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2142172420, now seen corresponding path program 32 times [2019-11-23 20:10:44,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:44,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762682113] [2019-11-23 20:10:44,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:10:44,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762682113] [2019-11-23 20:10:44,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860360501] [2019-11-23 20:10:44,576 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:44,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:44,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:44,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:10:44,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:10:44,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:44,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:10:44,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013148433] [2019-11-23 20:10:44,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:10:44,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:44,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:10:44,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:10:44,703 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 36 states. [2019-11-23 20:10:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:44,816 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2019-11-23 20:10:44,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:10:44,816 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 161 [2019-11-23 20:10:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:44,817 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:10:44,817 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:10:44,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:10:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:10:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 20:10:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:10:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 20:10:44,824 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 20:10:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:44,824 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 20:10:44,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:10:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 20:10:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 20:10:44,825 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:44,825 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:45,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:45,029 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:45,030 INFO L82 PathProgramCache]: Analyzing trace with hash 370015802, now seen corresponding path program 33 times [2019-11-23 20:10:45,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:45,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857986733] [2019-11-23 20:10:45,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:10:45,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857986733] [2019-11-23 20:10:45,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048362675] [2019-11-23 20:10:45,760 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:45,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 20:10:45,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:45,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:10:46,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1389 trivial. 0 not checked. [2019-11-23 20:10:46,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:46,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2019-11-23 20:10:46,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601847463] [2019-11-23 20:10:46,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:10:46,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:46,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:10:46,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:10:46,242 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 47 states. [2019-11-23 20:10:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:46,560 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2019-11-23 20:10:46,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:10:46,560 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2019-11-23 20:10:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:46,562 INFO L225 Difference]: With dead ends: 271 [2019-11-23 20:10:46,562 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:10:46,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:10:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:10:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2019-11-23 20:10:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:10:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2019-11-23 20:10:46,567 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2019-11-23 20:10:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:46,568 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2019-11-23 20:10:46,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:10:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2019-11-23 20:10:46,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 20:10:46,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:46,569 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:46,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:46,773 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash -257617674, now seen corresponding path program 34 times [2019-11-23 20:10:46,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:46,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186380569] [2019-11-23 20:10:46,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:10:47,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186380569] [2019-11-23 20:10:47,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315294387] [2019-11-23 20:10:47,380 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:47,472 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:47,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:47,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:10:47,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2019-11-23 20:10:47,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:47,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2019-11-23 20:10:47,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054685606] [2019-11-23 20:10:47,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:10:47,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:10:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:10:47,752 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 49 states. [2019-11-23 20:10:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:48,140 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2019-11-23 20:10:48,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:10:48,140 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2019-11-23 20:10:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:48,142 INFO L225 Difference]: With dead ends: 285 [2019-11-23 20:10:48,142 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 20:10:48,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:10:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 20:10:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2019-11-23 20:10:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 20:10:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2019-11-23 20:10:48,149 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 171 [2019-11-23 20:10:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:48,149 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2019-11-23 20:10:48,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:10:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2019-11-23 20:10:48,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 20:10:48,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:48,150 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:48,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:48,353 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:48,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1138775886, now seen corresponding path program 35 times [2019-11-23 20:10:48,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:48,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108872734] [2019-11-23 20:10:48,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:10:49,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108872734] [2019-11-23 20:10:49,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812177315] [2019-11-23 20:10:49,033 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:35,911 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 20:11:35,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:35,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:11:35,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1613 trivial. 0 not checked. [2019-11-23 20:11:36,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:36,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 15] total 51 [2019-11-23 20:11:36,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770218185] [2019-11-23 20:11:36,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:11:36,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:11:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:11:36,217 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 51 states. [2019-11-23 20:11:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:36,622 INFO L93 Difference]: Finished difference Result 299 states and 310 transitions. [2019-11-23 20:11:36,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:11:36,622 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 179 [2019-11-23 20:11:36,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:36,624 INFO L225 Difference]: With dead ends: 299 [2019-11-23 20:11:36,624 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:11:36,626 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:11:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:11:36,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2019-11-23 20:11:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:11:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2019-11-23 20:11:36,631 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 179 [2019-11-23 20:11:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:36,631 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2019-11-23 20:11:36,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:11:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2019-11-23 20:11:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 20:11:36,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:36,632 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 13, 13, 13, 13, 13, 13, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:36,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:36,848 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash -556563090, now seen corresponding path program 36 times [2019-11-23 20:11:36,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:36,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055928934] [2019-11-23 20:11:36,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2019-11-23 20:11:37,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055928934] [2019-11-23 20:11:37,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720912817] [2019-11-23 20:11:37,563 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:48,801 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:11:48,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:48,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:11:48,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1903 backedges. 71 proven. 100 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2019-11-23 20:11:49,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:49,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 15] total 52 [2019-11-23 20:11:49,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467198419] [2019-11-23 20:11:49,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:11:49,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:49,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:11:49,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:11:49,116 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 52 states. [2019-11-23 20:11:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:49,606 INFO L93 Difference]: Finished difference Result 308 states and 318 transitions. [2019-11-23 20:11:49,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:11:49,612 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 187 [2019-11-23 20:11:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:49,613 INFO L225 Difference]: With dead ends: 308 [2019-11-23 20:11:49,614 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:11:49,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1051, Invalid=2855, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 20:11:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:11:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-23 20:11:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 20:11:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-11-23 20:11:49,622 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 187 [2019-11-23 20:11:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:49,622 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-11-23 20:11:49,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:11:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-11-23 20:11:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 20:11:49,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:49,623 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:49,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:49,832 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:49,832 INFO L82 PathProgramCache]: Analyzing trace with hash 712240488, now seen corresponding path program 37 times [2019-11-23 20:11:49,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:49,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711606842] [2019-11-23 20:11:49,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:11:50,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711606842] [2019-11-23 20:11:50,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875591418] [2019-11-23 20:11:50,523 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:50,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:11:50,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:11:50,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:50,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:11:50,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636045825] [2019-11-23 20:11:50,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:11:50,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:11:50,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:11:50,672 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 42 states. [2019-11-23 20:11:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:50,828 INFO L93 Difference]: Finished difference Result 312 states and 320 transitions. [2019-11-23 20:11:50,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:11:50,828 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 193 [2019-11-23 20:11:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:50,829 INFO L225 Difference]: With dead ends: 312 [2019-11-23 20:11:50,830 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 20:11:50,830 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:11:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 20:11:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-11-23 20:11:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 20:11:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2019-11-23 20:11:50,836 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2019-11-23 20:11:50,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:50,836 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2019-11-23 20:11:50,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:11:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2019-11-23 20:11:50,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 20:11:50,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:50,838 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:51,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:51,042 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:51,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:51,042 INFO L82 PathProgramCache]: Analyzing trace with hash 300181670, now seen corresponding path program 38 times [2019-11-23 20:11:51,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:51,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571911141] [2019-11-23 20:11:51,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:11:51,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571911141] [2019-11-23 20:11:51,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461189152] [2019-11-23 20:11:51,942 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:52,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:52,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:52,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:11:52,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2149 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 20:11:52,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:52,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 20:11:52,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788863449] [2019-11-23 20:11:52,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:11:52,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:52,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:11:52,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:11:52,087 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 43 states. [2019-11-23 20:11:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:52,229 INFO L93 Difference]: Finished difference Result 314 states and 322 transitions. [2019-11-23 20:11:52,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:11:52,229 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 195 [2019-11-23 20:11:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:52,230 INFO L225 Difference]: With dead ends: 314 [2019-11-23 20:11:52,230 INFO L226 Difference]: Without dead ends: 199 [2019-11-23 20:11:52,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:11:52,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-11-23 20:11:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2019-11-23 20:11:52,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-11-23 20:11:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2019-11-23 20:11:52,238 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 195 [2019-11-23 20:11:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:52,239 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2019-11-23 20:11:52,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:11:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2019-11-23 20:11:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-11-23 20:11:52,240 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:52,240 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 13, 13, 13, 13, 13, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]