/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:07:06,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:07:06,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:07:06,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:07:06,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:07:06,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:07:06,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:07:06,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:07:06,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:07:06,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:07:06,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:07:06,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:07:06,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:07:06,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:07:06,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:07:06,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:07:06,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:07:06,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:07:06,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:07:06,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:07:06,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:07:06,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:07:06,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:07:06,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:07:06,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:07:06,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:07:06,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:07:06,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:07:06,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:07:06,090 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:07:06,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:07:06,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:07:06,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:07:06,092 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:07:06,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:07:06,092 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:07:06,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:07:06,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:07:06,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:07:06,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:07:06,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:07:06,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:07:06,094 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:07:06,094 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:07:06,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:07:06,094 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:07:06,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:07:06,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:07:06,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:07:06,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:07:06,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:07:06,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:07:06,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:07:06,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:07:06,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:07:06,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:07:06,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:07:06,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:07:06,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:07:06,383 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:07:06,396 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:07:06,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:07:06,401 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:07:06,401 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:07:06,402 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2019-11-23 22:07:06,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cac10d64/fcd9e4a3dc0741489eec89510558f7e1/FLAG25c26f5ea [2019-11-23 22:07:06,945 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:07:06,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2019-11-23 22:07:06,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cac10d64/fcd9e4a3dc0741489eec89510558f7e1/FLAG25c26f5ea [2019-11-23 22:07:07,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cac10d64/fcd9e4a3dc0741489eec89510558f7e1 [2019-11-23 22:07:07,339 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:07:07,341 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:07:07,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:07:07,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:07:07,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:07:07,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b22fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07, skipping insertion in model container [2019-11-23 22:07:07,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:07:07,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:07:07,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:07:07,549 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:07:07,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:07:07,586 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:07:07,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07 WrapperNode [2019-11-23 22:07:07,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:07:07,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:07:07,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:07:07,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:07:07,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:07:07,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:07:07,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:07:07,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:07:07,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (1/1) ... [2019-11-23 22:07:07,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:07:07,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:07:07,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:07:07,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:07:07,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:07:07,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:07:07,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:07:07,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:07:07,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:07:07,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:07:07,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:07:08,027 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:07:08,027 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 22:07:08,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:07:08 BoogieIcfgContainer [2019-11-23 22:07:08,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:07:08,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:07:08,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:07:08,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:07:08,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:07:07" (1/3) ... [2019-11-23 22:07:08,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202b8957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:07:08, skipping insertion in model container [2019-11-23 22:07:08,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:07:07" (2/3) ... [2019-11-23 22:07:08,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202b8957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:07:08, skipping insertion in model container [2019-11-23 22:07:08,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:07:08" (3/3) ... [2019-11-23 22:07:08,050 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2019-11-23 22:07:08,072 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:07:08,078 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:07:08,088 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:07:08,113 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:07:08,113 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:07:08,113 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:07:08,113 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:07:08,114 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:07:08,114 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:07:08,114 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:07:08,114 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:07:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-23 22:07:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:07:08,132 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:08,133 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:08,133 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:08,139 INFO L82 PathProgramCache]: Analyzing trace with hash 212441967, now seen corresponding path program 1 times [2019-11-23 22:07:08,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:08,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292163067] [2019-11-23 22:07:08,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292163067] [2019-11-23 22:07:08,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:07:08,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:07:08,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461724312] [2019-11-23 22:07:08,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:07:08,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:08,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:07:08,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:07:08,270 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-23 22:07:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:08,284 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-23 22:07:08,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:07:08,285 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 22:07:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:08,294 INFO L225 Difference]: With dead ends: 30 [2019-11-23 22:07:08,294 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 22:07:08,297 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:07:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 22:07:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 22:07:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 22:07:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-23 22:07:08,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2019-11-23 22:07:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:08,329 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-23 22:07:08,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:07:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-23 22:07:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:07:08,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:08,330 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:08,330 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:08,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1850569592, now seen corresponding path program 1 times [2019-11-23 22:07:08,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:08,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746310646] [2019-11-23 22:07:08,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:07:08,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746310646] [2019-11-23 22:07:08,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:07:08,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:07:08,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349108047] [2019-11-23 22:07:08,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:07:08,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:08,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:07:08,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:07:08,378 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-23 22:07:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:08,433 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-11-23 22:07:08,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:07:08,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 22:07:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:08,438 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:07:08,439 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:07:08,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:07:08,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:07:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2019-11-23 22:07:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:07:08,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-23 22:07:08,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2019-11-23 22:07:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:08,446 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-23 22:07:08,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:07:08,446 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-23 22:07:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:07:08,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:08,447 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:08,448 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:08,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:08,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1195372026, now seen corresponding path program 1 times [2019-11-23 22:07:08,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:08,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947258209] [2019-11-23 22:07:08,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:07:08,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947258209] [2019-11-23 22:07:08,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:07:08,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:07:08,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220552409] [2019-11-23 22:07:08,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:07:08,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:08,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:07:08,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:07:08,536 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-23 22:07:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:08,586 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-11-23 22:07:08,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:07:08,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-23 22:07:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:08,588 INFO L225 Difference]: With dead ends: 23 [2019-11-23 22:07:08,588 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:07:08,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:07:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:07:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-23 22:07:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:07:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 22:07:08,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2019-11-23 22:07:08,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:08,594 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 22:07:08,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:07:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 22:07:08,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:07:08,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:08,595 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:08,595 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:08,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2108759713, now seen corresponding path program 1 times [2019-11-23 22:07:08,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:08,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625717102] [2019-11-23 22:07:08,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:07:08,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625717102] [2019-11-23 22:07:08,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698190545] [2019-11-23 22:07:08,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:08,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:07:08,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:07:08,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:08,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-23 22:07:08,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423625527] [2019-11-23 22:07:08,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:07:08,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:08,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:07:08,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:07:08,796 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 6 states. [2019-11-23 22:07:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:08,883 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2019-11-23 22:07:08,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:07:08,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-23 22:07:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:08,885 INFO L225 Difference]: With dead ends: 39 [2019-11-23 22:07:08,885 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:07:08,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:07:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:07:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-23 22:07:08,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:07:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-23 22:07:08,894 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-23 22:07:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:08,894 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-23 22:07:08,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:07:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-23 22:07:08,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:07:08,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:08,896 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:09,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,100 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:09,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:09,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1476418118, now seen corresponding path program 2 times [2019-11-23 22:07:09,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:09,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706874417] [2019-11-23 22:07:09,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:07:09,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706874417] [2019-11-23 22:07:09,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341371429] [2019-11-23 22:07:09,192 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:09,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:09,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:07:09,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:07:09,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:09,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-23 22:07:09,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712388643] [2019-11-23 22:07:09,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:07:09,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:07:09,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:07:09,269 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2019-11-23 22:07:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:09,352 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-11-23 22:07:09,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:07:09,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-11-23 22:07:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:09,369 INFO L225 Difference]: With dead ends: 49 [2019-11-23 22:07:09,370 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:07:09,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:07:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:07:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-23 22:07:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:07:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-23 22:07:09,376 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2019-11-23 22:07:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:09,376 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-23 22:07:09,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:07:09,376 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-23 22:07:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:07:09,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:09,377 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:09,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,578 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:09,579 INFO L82 PathProgramCache]: Analyzing trace with hash -936804819, now seen corresponding path program 3 times [2019-11-23 22:07:09,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:09,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764528414] [2019-11-23 22:07:09,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:07:09,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764528414] [2019-11-23 22:07:09,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724869164] [2019-11-23 22:07:09,685 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:09,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:07:09,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:09,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:07:09,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 22:07:09,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:09,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-23 22:07:09,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356403636] [2019-11-23 22:07:09,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:07:09,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:09,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:07:09,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:07:09,773 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 8 states. [2019-11-23 22:07:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:09,855 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2019-11-23 22:07:09,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:07:09,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-11-23 22:07:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:09,857 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:07:09,857 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:07:09,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:07:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:07:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-11-23 22:07:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:07:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-11-23 22:07:09,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 28 [2019-11-23 22:07:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:09,863 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-11-23 22:07:09,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:07:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-11-23 22:07:09,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:07:09,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:09,865 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:10,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,066 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:10,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1584000276, now seen corresponding path program 4 times [2019-11-23 22:07:10,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:10,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23338829] [2019-11-23 22:07:10,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:07:10,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23338829] [2019-11-23 22:07:10,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647487410] [2019-11-23 22:07:10,218 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,257 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:10,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:10,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:07:10,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 22:07:10,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:10,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-23 22:07:10,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070561726] [2019-11-23 22:07:10,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:07:10,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:07:10,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:07:10,279 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 9 states. [2019-11-23 22:07:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:10,383 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2019-11-23 22:07:10,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:07:10,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-11-23 22:07:10,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:10,385 INFO L225 Difference]: With dead ends: 69 [2019-11-23 22:07:10,385 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:07:10,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:07:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:07:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-11-23 22:07:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:07:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-11-23 22:07:10,392 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 34 [2019-11-23 22:07:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:10,393 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-11-23 22:07:10,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:07:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-11-23 22:07:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:07:10,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,394 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:10,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,598 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash -818329861, now seen corresponding path program 5 times [2019-11-23 22:07:10,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:10,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087009874] [2019-11-23 22:07:10,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 22:07:10,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087009874] [2019-11-23 22:07:10,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283616606] [2019-11-23 22:07:10,728 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:10,799 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:07:10,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:10,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:07:10,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 22:07:10,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:10,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-23 22:07:10,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550005285] [2019-11-23 22:07:10,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:07:10,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:10,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:07:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:07:10,830 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 10 states. [2019-11-23 22:07:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:10,924 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2019-11-23 22:07:10,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:07:10,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-11-23 22:07:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:10,925 INFO L225 Difference]: With dead ends: 79 [2019-11-23 22:07:10,925 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 22:07:10,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:07:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 22:07:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-11-23 22:07:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:07:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-23 22:07:10,932 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 40 [2019-11-23 22:07:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:10,933 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-23 22:07:10,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:07:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-23 22:07:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:07:10,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:10,934 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:11,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,140 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:11,141 INFO L82 PathProgramCache]: Analyzing trace with hash -303617054, now seen corresponding path program 6 times [2019-11-23 22:07:11,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:11,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386848470] [2019-11-23 22:07:11,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 22:07:11,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386848470] [2019-11-23 22:07:11,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439691249] [2019-11-23 22:07:11,322 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,415 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:07:11,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:11,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:07:11,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 22:07:11,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:11,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-23 22:07:11,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278553234] [2019-11-23 22:07:11,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:07:11,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:07:11,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:07:11,442 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 11 states. [2019-11-23 22:07:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:11,546 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2019-11-23 22:07:11,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:07:11,547 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2019-11-23 22:07:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:11,548 INFO L225 Difference]: With dead ends: 89 [2019-11-23 22:07:11,548 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 22:07:11,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:07:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 22:07:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-11-23 22:07:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:07:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2019-11-23 22:07:11,554 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 46 [2019-11-23 22:07:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:11,555 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2019-11-23 22:07:11,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:07:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2019-11-23 22:07:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:07:11,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:11,556 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:11,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,759 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash 580598729, now seen corresponding path program 7 times [2019-11-23 22:07:11,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:11,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324531909] [2019-11-23 22:07:11,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:07:11,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324531909] [2019-11-23 22:07:11,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845021117] [2019-11-23 22:07:11,911 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:11,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:07:11,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 22:07:11,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:11,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-23 22:07:11,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357797596] [2019-11-23 22:07:11,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:07:11,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:11,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:07:11,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:07:11,987 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 12 states. [2019-11-23 22:07:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:12,103 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2019-11-23 22:07:12,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:07:12,103 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2019-11-23 22:07:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:12,104 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:07:12,104 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 22:07:12,105 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:07:12,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 22:07:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-11-23 22:07:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:07:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2019-11-23 22:07:12,111 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 52 [2019-11-23 22:07:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:12,111 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2019-11-23 22:07:12,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:07:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2019-11-23 22:07:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:07:12,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:12,112 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:12,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,323 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:12,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1616189104, now seen corresponding path program 8 times [2019-11-23 22:07:12,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:12,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777011433] [2019-11-23 22:07:12,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 22:07:12,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777011433] [2019-11-23 22:07:12,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304036178] [2019-11-23 22:07:12,473 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:12,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:12,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:07:12,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 22:07:12,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:12,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-23 22:07:12,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130088742] [2019-11-23 22:07:12,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:07:12,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:12,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:07:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:07:12,573 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 13 states. [2019-11-23 22:07:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:12,663 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2019-11-23 22:07:12,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:07:12,664 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2019-11-23 22:07:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:12,665 INFO L225 Difference]: With dead ends: 109 [2019-11-23 22:07:12,665 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:07:12,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:07:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:07:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-23 22:07:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 22:07:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2019-11-23 22:07:12,675 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 58 [2019-11-23 22:07:12,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:12,675 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2019-11-23 22:07:12,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:07:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2019-11-23 22:07:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:07:12,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:12,677 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:12,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:12,880 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:12,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1695785833, now seen corresponding path program 9 times [2019-11-23 22:07:12,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:12,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042818877] [2019-11-23 22:07:12,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 22:07:13,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042818877] [2019-11-23 22:07:13,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683849252] [2019-11-23 22:07:13,051 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:07:13,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:13,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:07:13,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 22:07:13,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:13,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-23 22:07:13,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016543560] [2019-11-23 22:07:13,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:07:13,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:13,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:07:13,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:07:13,186 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 14 states. [2019-11-23 22:07:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:13,292 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2019-11-23 22:07:13,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:07:13,293 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2019-11-23 22:07:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:13,293 INFO L225 Difference]: With dead ends: 119 [2019-11-23 22:07:13,294 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:07:13,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:07:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:07:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-11-23 22:07:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:07:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2019-11-23 22:07:13,301 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 64 [2019-11-23 22:07:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:13,301 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2019-11-23 22:07:13,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:07:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2019-11-23 22:07:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 22:07:13,302 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:13,302 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:13,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,512 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1122980482, now seen corresponding path program 10 times [2019-11-23 22:07:13,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:13,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792483738] [2019-11-23 22:07:13,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:07:13,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792483738] [2019-11-23 22:07:13,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933891661] [2019-11-23 22:07:13,639 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:13,689 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:13,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:13,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:07:13,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 22:07:13,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:13,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-23 22:07:13,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968395869] [2019-11-23 22:07:13,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:07:13,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:13,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:07:13,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:07:13,723 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 15 states. [2019-11-23 22:07:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:13,853 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2019-11-23 22:07:13,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:07:13,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2019-11-23 22:07:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:13,854 INFO L225 Difference]: With dead ends: 129 [2019-11-23 22:07:13,854 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 22:07:13,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:07:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 22:07:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-23 22:07:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:07:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2019-11-23 22:07:13,865 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 70 [2019-11-23 22:07:13,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:13,866 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2019-11-23 22:07:13,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:07:13,866 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2019-11-23 22:07:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:07:13,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:13,867 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:14,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:14,068 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:14,069 INFO L82 PathProgramCache]: Analyzing trace with hash 508143973, now seen corresponding path program 11 times [2019-11-23 22:07:14,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:14,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208382989] [2019-11-23 22:07:14,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 22:07:14,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208382989] [2019-11-23 22:07:14,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482333617] [2019-11-23 22:07:14,266 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:14,523 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:07:14,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:14,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:07:14,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 22:07:14,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:14,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-23 22:07:14,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650256132] [2019-11-23 22:07:14,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:07:14,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:07:14,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:07:14,567 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 16 states. [2019-11-23 22:07:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:14,698 INFO L93 Difference]: Finished difference Result 139 states and 167 transitions. [2019-11-23 22:07:14,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:07:14,698 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 76 [2019-11-23 22:07:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:14,699 INFO L225 Difference]: With dead ends: 139 [2019-11-23 22:07:14,699 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 22:07:14,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:07:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 22:07:14,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-23 22:07:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 22:07:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2019-11-23 22:07:14,706 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 76 [2019-11-23 22:07:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:14,706 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2019-11-23 22:07:14,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:07:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2019-11-23 22:07:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 22:07:14,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:14,711 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:14,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:14,921 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:14,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2029449292, now seen corresponding path program 12 times [2019-11-23 22:07:14,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:14,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909832271] [2019-11-23 22:07:14,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 22:07:15,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909832271] [2019-11-23 22:07:15,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884202206] [2019-11-23 22:07:15,090 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:15,242 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:07:15,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:15,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:07:15,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 22:07:15,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:15,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-11-23 22:07:15,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644325386] [2019-11-23 22:07:15,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:07:15,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:15,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:07:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:07:15,275 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 17 states. [2019-11-23 22:07:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:15,415 INFO L93 Difference]: Finished difference Result 149 states and 179 transitions. [2019-11-23 22:07:15,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:07:15,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2019-11-23 22:07:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:15,416 INFO L225 Difference]: With dead ends: 149 [2019-11-23 22:07:15,416 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 22:07:15,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:07:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 22:07:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-11-23 22:07:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 22:07:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2019-11-23 22:07:15,424 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 82 [2019-11-23 22:07:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:15,424 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2019-11-23 22:07:15,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:07:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2019-11-23 22:07:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 22:07:15,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:15,425 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:15,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:15,626 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:15,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1615864371, now seen corresponding path program 13 times [2019-11-23 22:07:15,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:15,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279062564] [2019-11-23 22:07:15,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 22:07:15,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279062564] [2019-11-23 22:07:15,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785842947] [2019-11-23 22:07:15,796 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:15,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:07:15,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 22:07:15,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:15,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-23 22:07:15,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881634679] [2019-11-23 22:07:15,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:07:15,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:15,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:07:15,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:07:15,882 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand 18 states. [2019-11-23 22:07:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:16,003 INFO L93 Difference]: Finished difference Result 159 states and 191 transitions. [2019-11-23 22:07:16,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:07:16,004 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2019-11-23 22:07:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:16,005 INFO L225 Difference]: With dead ends: 159 [2019-11-23 22:07:16,005 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 22:07:16,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:07:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 22:07:16,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-23 22:07:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 22:07:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2019-11-23 22:07:16,012 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 88 [2019-11-23 22:07:16,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:16,012 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2019-11-23 22:07:16,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:07:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2019-11-23 22:07:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 22:07:16,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:16,014 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:16,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:16,217 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:16,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash 912580378, now seen corresponding path program 14 times [2019-11-23 22:07:16,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:16,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435727856] [2019-11-23 22:07:16,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 22:07:16,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435727856] [2019-11-23 22:07:16,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612325758] [2019-11-23 22:07:16,397 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:16,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:16,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:16,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:07:16,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-23 22:07:16,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:16,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-23 22:07:16,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670345844] [2019-11-23 22:07:16,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:07:16,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:16,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:07:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:07:16,510 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand 19 states. [2019-11-23 22:07:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:16,655 INFO L93 Difference]: Finished difference Result 169 states and 203 transitions. [2019-11-23 22:07:16,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:07:16,655 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2019-11-23 22:07:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:16,656 INFO L225 Difference]: With dead ends: 169 [2019-11-23 22:07:16,656 INFO L226 Difference]: Without dead ends: 103 [2019-11-23 22:07:16,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=221, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:07:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-23 22:07:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-23 22:07:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 22:07:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2019-11-23 22:07:16,661 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 94 [2019-11-23 22:07:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:16,662 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2019-11-23 22:07:16,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:07:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2019-11-23 22:07:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 22:07:16,663 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:16,663 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:16,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:16,872 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1575172351, now seen corresponding path program 15 times [2019-11-23 22:07:16,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:16,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696289278] [2019-11-23 22:07:16,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 22:07:17,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696289278] [2019-11-23 22:07:17,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917001256] [2019-11-23 22:07:17,087 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:17,444 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 22:07:17,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:17,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:07:17,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-23 22:07:17,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:17,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-11-23 22:07:17,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856718359] [2019-11-23 22:07:17,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:07:17,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:17,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:07:17,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:07:17,473 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand 20 states. [2019-11-23 22:07:17,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:17,617 INFO L93 Difference]: Finished difference Result 179 states and 215 transitions. [2019-11-23 22:07:17,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:07:17,618 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2019-11-23 22:07:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:17,619 INFO L225 Difference]: With dead ends: 179 [2019-11-23 22:07:17,619 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 22:07:17,619 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=243, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:07:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 22:07:17,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-11-23 22:07:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-23 22:07:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2019-11-23 22:07:17,624 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 100 [2019-11-23 22:07:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:17,624 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2019-11-23 22:07:17,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:07:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2019-11-23 22:07:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-23 22:07:17,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:17,625 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:17,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:17,830 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:17,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:17,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2059961880, now seen corresponding path program 16 times [2019-11-23 22:07:17,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:17,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694837423] [2019-11-23 22:07:17,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 22:07:18,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694837423] [2019-11-23 22:07:18,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614673010] [2019-11-23 22:07:18,060 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:18,118 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:18,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:18,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:07:18,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-11-23 22:07:18,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:18,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-23 22:07:18,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823752200] [2019-11-23 22:07:18,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:07:18,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:18,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:07:18,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:07:18,147 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand 21 states. [2019-11-23 22:07:18,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:18,296 INFO L93 Difference]: Finished difference Result 189 states and 227 transitions. [2019-11-23 22:07:18,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:07:18,297 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2019-11-23 22:07:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:18,298 INFO L225 Difference]: With dead ends: 189 [2019-11-23 22:07:18,298 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 22:07:18,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=266, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:07:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 22:07:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-11-23 22:07:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 22:07:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2019-11-23 22:07:18,303 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 106 [2019-11-23 22:07:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:18,303 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2019-11-23 22:07:18,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:07:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2019-11-23 22:07:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-23 22:07:18,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:18,305 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:18,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:18,509 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1917622223, now seen corresponding path program 17 times [2019-11-23 22:07:18,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:18,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128421744] [2019-11-23 22:07:18,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 22:07:18,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128421744] [2019-11-23 22:07:18,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244553061] [2019-11-23 22:07:18,867 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:19,189 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:07:19,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:19,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:07:19,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-11-23 22:07:19,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:19,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-11-23 22:07:19,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655599974] [2019-11-23 22:07:19,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:07:19,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:19,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:07:19,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:07:19,230 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand 22 states. [2019-11-23 22:07:19,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:19,391 INFO L93 Difference]: Finished difference Result 199 states and 239 transitions. [2019-11-23 22:07:19,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:07:19,391 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 112 [2019-11-23 22:07:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:19,392 INFO L225 Difference]: With dead ends: 199 [2019-11-23 22:07:19,392 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 22:07:19,393 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=290, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:07:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 22:07:19,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2019-11-23 22:07:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-23 22:07:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 139 transitions. [2019-11-23 22:07:19,397 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 139 transitions. Word has length 112 [2019-11-23 22:07:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:19,397 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 139 transitions. [2019-11-23 22:07:19,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:07:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 139 transitions. [2019-11-23 22:07:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-23 22:07:19,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:19,399 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:19,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:19,604 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1563705162, now seen corresponding path program 18 times [2019-11-23 22:07:19,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:19,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926016818] [2019-11-23 22:07:19,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 22:07:19,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926016818] [2019-11-23 22:07:19,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244270338] [2019-11-23 22:07:19,876 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:20,394 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:07:20,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:20,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:07:20,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2019-11-23 22:07:20,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:20,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-11-23 22:07:20,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004504188] [2019-11-23 22:07:20,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:07:20,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:20,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:07:20,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:07:20,436 INFO L87 Difference]: Start difference. First operand 119 states and 139 transitions. Second operand 23 states. [2019-11-23 22:07:20,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:20,630 INFO L93 Difference]: Finished difference Result 209 states and 251 transitions. [2019-11-23 22:07:20,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:07:20,631 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2019-11-23 22:07:20,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:20,632 INFO L225 Difference]: With dead ends: 209 [2019-11-23 22:07:20,632 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 22:07:20,633 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=315, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:07:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 22:07:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-11-23 22:07:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 22:07:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2019-11-23 22:07:20,638 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 118 [2019-11-23 22:07:20,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:20,638 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2019-11-23 22:07:20,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:07:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2019-11-23 22:07:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 22:07:20,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:20,640 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:20,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:20,852 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:20,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1828492445, now seen corresponding path program 19 times [2019-11-23 22:07:20,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:20,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351596817] [2019-11-23 22:07:20,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-23 22:07:21,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351596817] [2019-11-23 22:07:21,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752623794] [2019-11-23 22:07:21,140 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:21,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:07:21,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-11-23 22:07:21,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:21,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-23 22:07:21,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76934554] [2019-11-23 22:07:21,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:07:21,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:21,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:07:21,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:07:21,261 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand 24 states. [2019-11-23 22:07:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:21,424 INFO L93 Difference]: Finished difference Result 219 states and 263 transitions. [2019-11-23 22:07:21,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:07:21,427 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-11-23 22:07:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:21,428 INFO L225 Difference]: With dead ends: 219 [2019-11-23 22:07:21,428 INFO L226 Difference]: Without dead ends: 133 [2019-11-23 22:07:21,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:07:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-23 22:07:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2019-11-23 22:07:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-23 22:07:21,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2019-11-23 22:07:21,433 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 124 [2019-11-23 22:07:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:21,433 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2019-11-23 22:07:21,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:07:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2019-11-23 22:07:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-23 22:07:21,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:21,434 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:21,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:21,638 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:21,638 INFO L82 PathProgramCache]: Analyzing trace with hash 972993412, now seen corresponding path program 20 times [2019-11-23 22:07:21,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:21,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043340559] [2019-11-23 22:07:21,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:07:21,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043340559] [2019-11-23 22:07:21,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859629782] [2019-11-23 22:07:21,940 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:22,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:22,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:22,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:07:22,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2019-11-23 22:07:22,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:22,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-23 22:07:22,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9423821] [2019-11-23 22:07:22,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:07:22,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:22,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:07:22,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:07:22,073 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand 25 states. [2019-11-23 22:07:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:22,243 INFO L93 Difference]: Finished difference Result 229 states and 275 transitions. [2019-11-23 22:07:22,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:07:22,244 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 130 [2019-11-23 22:07:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:22,244 INFO L225 Difference]: With dead ends: 229 [2019-11-23 22:07:22,244 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 22:07:22,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:07:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 22:07:22,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2019-11-23 22:07:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-23 22:07:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2019-11-23 22:07:22,250 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 130 [2019-11-23 22:07:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:22,250 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2019-11-23 22:07:22,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:07:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2019-11-23 22:07:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-23 22:07:22,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:22,251 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:22,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:22,454 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:22,455 INFO L82 PathProgramCache]: Analyzing trace with hash -70664853, now seen corresponding path program 21 times [2019-11-23 22:07:22,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:22,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461126128] [2019-11-23 22:07:22,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 22:07:22,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461126128] [2019-11-23 22:07:22,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801984639] [2019-11-23 22:07:22,781 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:23,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 22:07:23,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:23,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:07:23,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2019-11-23 22:07:23,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:23,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-11-23 22:07:23,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66597632] [2019-11-23 22:07:23,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:07:23,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:23,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:07:23,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:07:23,718 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand 26 states. [2019-11-23 22:07:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:24,028 INFO L93 Difference]: Finished difference Result 239 states and 287 transitions. [2019-11-23 22:07:24,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:07:24,028 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 136 [2019-11-23 22:07:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:24,029 INFO L225 Difference]: With dead ends: 239 [2019-11-23 22:07:24,030 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 22:07:24,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:07:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 22:07:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2019-11-23 22:07:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-23 22:07:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 167 transitions. [2019-11-23 22:07:24,034 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 167 transitions. Word has length 136 [2019-11-23 22:07:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:24,034 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 167 transitions. [2019-11-23 22:07:24,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:07:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 167 transitions. [2019-11-23 22:07:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-23 22:07:24,035 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:24,036 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:24,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:24,241 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash 590172754, now seen corresponding path program 22 times [2019-11-23 22:07:24,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:24,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802945847] [2019-11-23 22:07:24,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 22:07:24,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802945847] [2019-11-23 22:07:24,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800524545] [2019-11-23 22:07:24,575 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:24,654 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:24,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:24,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:07:24,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2019-11-23 22:07:24,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:24,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-23 22:07:24,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104073039] [2019-11-23 22:07:24,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:07:24,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:24,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:07:24,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:07:24,686 INFO L87 Difference]: Start difference. First operand 143 states and 167 transitions. Second operand 27 states. [2019-11-23 22:07:24,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:24,921 INFO L93 Difference]: Finished difference Result 249 states and 299 transitions. [2019-11-23 22:07:24,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:07:24,922 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 142 [2019-11-23 22:07:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:24,924 INFO L225 Difference]: With dead ends: 249 [2019-11-23 22:07:24,924 INFO L226 Difference]: Without dead ends: 151 [2019-11-23 22:07:24,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-23 22:07:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2019-11-23 22:07:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-11-23 22:07:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2019-11-23 22:07:24,929 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 142 [2019-11-23 22:07:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:24,929 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2019-11-23 22:07:24,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:07:24,929 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2019-11-23 22:07:24,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-23 22:07:24,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:24,930 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:25,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:25,131 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:25,131 INFO L82 PathProgramCache]: Analyzing trace with hash 366023225, now seen corresponding path program 23 times [2019-11-23 22:07:25,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:25,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974854637] [2019-11-23 22:07:25,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 22:07:25,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974854637] [2019-11-23 22:07:25,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035281509] [2019-11-23 22:07:25,560 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:26,225 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 22:07:26,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:26,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:07:26,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-11-23 22:07:26,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:26,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-11-23 22:07:26,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087133646] [2019-11-23 22:07:26,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:07:26,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:26,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:07:26,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:07:26,258 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand 28 states. [2019-11-23 22:07:26,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:26,505 INFO L93 Difference]: Finished difference Result 259 states and 311 transitions. [2019-11-23 22:07:26,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:07:26,505 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 148 [2019-11-23 22:07:26,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:26,506 INFO L225 Difference]: With dead ends: 259 [2019-11-23 22:07:26,506 INFO L226 Difference]: Without dead ends: 157 [2019-11-23 22:07:26,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=357, Invalid=455, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:07:26,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-23 22:07:26,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2019-11-23 22:07:26,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-23 22:07:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 181 transitions. [2019-11-23 22:07:26,511 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 181 transitions. Word has length 148 [2019-11-23 22:07:26,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:26,512 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 181 transitions. [2019-11-23 22:07:26,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:07:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 181 transitions. [2019-11-23 22:07:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-23 22:07:26,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:26,513 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:26,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:26,719 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:26,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash 607427872, now seen corresponding path program 24 times [2019-11-23 22:07:26,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:26,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557667706] [2019-11-23 22:07:26,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-23 22:07:27,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557667706] [2019-11-23 22:07:27,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206195134] [2019-11-23 22:07:27,217 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:29,766 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 22:07:29,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:29,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:07:29,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2019-11-23 22:07:29,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:29,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-11-23 22:07:29,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159217192] [2019-11-23 22:07:29,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:07:29,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:29,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:07:29,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:07:29,811 INFO L87 Difference]: Start difference. First operand 155 states and 181 transitions. Second operand 29 states. [2019-11-23 22:07:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:30,053 INFO L93 Difference]: Finished difference Result 269 states and 323 transitions. [2019-11-23 22:07:30,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:07:30,053 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 154 [2019-11-23 22:07:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:30,054 INFO L225 Difference]: With dead ends: 269 [2019-11-23 22:07:30,055 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 22:07:30,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:07:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 22:07:30,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2019-11-23 22:07:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-23 22:07:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2019-11-23 22:07:30,060 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 154 [2019-11-23 22:07:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:30,060 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2019-11-23 22:07:30,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:07:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2019-11-23 22:07:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-23 22:07:30,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:30,061 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:30,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:30,267 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:30,268 INFO L82 PathProgramCache]: Analyzing trace with hash -5270777, now seen corresponding path program 25 times [2019-11-23 22:07:30,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:30,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778073824] [2019-11-23 22:07:30,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-23 22:07:30,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778073824] [2019-11-23 22:07:30,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262969820] [2019-11-23 22:07:30,748 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:30,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 22:07:30,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2019-11-23 22:07:30,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:30,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-23 22:07:30,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177141726] [2019-11-23 22:07:30,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:07:30,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:30,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:07:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:07:30,894 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand 30 states. [2019-11-23 22:07:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:31,101 INFO L93 Difference]: Finished difference Result 279 states and 335 transitions. [2019-11-23 22:07:31,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:07:31,101 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 160 [2019-11-23 22:07:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:31,102 INFO L225 Difference]: With dead ends: 279 [2019-11-23 22:07:31,102 INFO L226 Difference]: Without dead ends: 169 [2019-11-23 22:07:31,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=412, Invalid=518, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:07:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-11-23 22:07:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2019-11-23 22:07:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-11-23 22:07:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2019-11-23 22:07:31,108 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 160 [2019-11-23 22:07:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:31,108 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2019-11-23 22:07:31,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:07:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2019-11-23 22:07:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 22:07:31,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:31,109 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:31,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:31,313 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:31,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1334733842, now seen corresponding path program 26 times [2019-11-23 22:07:31,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:31,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216255114] [2019-11-23 22:07:31,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-23 22:07:31,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216255114] [2019-11-23 22:07:31,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002836277] [2019-11-23 22:07:31,776 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:31,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:31,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:31,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:07:31,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2019-11-23 22:07:31,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:31,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-23 22:07:31,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869228158] [2019-11-23 22:07:31,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:07:31,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:07:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:07:31,928 INFO L87 Difference]: Start difference. First operand 167 states and 195 transitions. Second operand 31 states. [2019-11-23 22:07:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:32,149 INFO L93 Difference]: Finished difference Result 289 states and 347 transitions. [2019-11-23 22:07:32,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:07:32,150 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 166 [2019-11-23 22:07:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:32,151 INFO L225 Difference]: With dead ends: 289 [2019-11-23 22:07:32,151 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 22:07:32,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=441, Invalid=551, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:07:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 22:07:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2019-11-23 22:07:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-23 22:07:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 202 transitions. [2019-11-23 22:07:32,157 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 202 transitions. Word has length 166 [2019-11-23 22:07:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:32,158 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 202 transitions. [2019-11-23 22:07:32,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:07:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 202 transitions. [2019-11-23 22:07:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-23 22:07:32,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:32,159 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:32,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:32,363 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:32,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash 193085397, now seen corresponding path program 27 times [2019-11-23 22:07:32,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:32,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789773011] [2019-11-23 22:07:32,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-11-23 22:07:32,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789773011] [2019-11-23 22:07:32,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489397564] [2019-11-23 22:07:32,866 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:36,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-23 22:07:36,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:36,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:07:36,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2019-11-23 22:07:36,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:36,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-11-23 22:07:36,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433778725] [2019-11-23 22:07:36,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:07:36,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:07:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:07:36,937 INFO L87 Difference]: Start difference. First operand 173 states and 202 transitions. Second operand 32 states. [2019-11-23 22:07:37,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:37,246 INFO L93 Difference]: Finished difference Result 299 states and 359 transitions. [2019-11-23 22:07:37,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:07:37,247 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 172 [2019-11-23 22:07:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:37,248 INFO L225 Difference]: With dead ends: 299 [2019-11-23 22:07:37,248 INFO L226 Difference]: Without dead ends: 181 [2019-11-23 22:07:37,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=471, Invalid=585, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:07:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-23 22:07:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2019-11-23 22:07:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-23 22:07:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 209 transitions. [2019-11-23 22:07:37,254 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 209 transitions. Word has length 172 [2019-11-23 22:07:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:37,255 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 209 transitions. [2019-11-23 22:07:37,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:07:37,255 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 209 transitions. [2019-11-23 22:07:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-23 22:07:37,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:37,257 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:37,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:37,466 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:37,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:37,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1463732548, now seen corresponding path program 28 times [2019-11-23 22:07:37,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:37,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342921655] [2019-11-23 22:07:37,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-11-23 22:07:38,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342921655] [2019-11-23 22:07:38,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116810955] [2019-11-23 22:07:38,035 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:38,144 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:07:38,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:38,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:07:38,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2019-11-23 22:07:38,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:38,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-11-23 22:07:38,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641553687] [2019-11-23 22:07:38,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:07:38,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:38,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:07:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:07:38,189 INFO L87 Difference]: Start difference. First operand 179 states and 209 transitions. Second operand 33 states. [2019-11-23 22:07:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:38,455 INFO L93 Difference]: Finished difference Result 309 states and 371 transitions. [2019-11-23 22:07:38,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:07:38,456 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 178 [2019-11-23 22:07:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:38,457 INFO L225 Difference]: With dead ends: 309 [2019-11-23 22:07:38,458 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 22:07:38,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=502, Invalid=620, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:07:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 22:07:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2019-11-23 22:07:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-11-23 22:07:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 216 transitions. [2019-11-23 22:07:38,466 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 216 transitions. Word has length 178 [2019-11-23 22:07:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:38,466 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 216 transitions. [2019-11-23 22:07:38,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:07:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 216 transitions. [2019-11-23 22:07:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-23 22:07:38,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:38,468 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:38,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:38,683 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:38,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1491474595, now seen corresponding path program 29 times [2019-11-23 22:07:38,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:38,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016252397] [2019-11-23 22:07:38,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 22:07:39,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016252397] [2019-11-23 22:07:39,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427314324] [2019-11-23 22:07:39,250 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:40,999 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 22:07:40,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:41,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:07:41,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2019-11-23 22:07:41,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:41,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-11-23 22:07:41,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429385908] [2019-11-23 22:07:41,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:07:41,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:41,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:07:41,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:07:41,056 INFO L87 Difference]: Start difference. First operand 185 states and 216 transitions. Second operand 34 states. [2019-11-23 22:07:41,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:41,313 INFO L93 Difference]: Finished difference Result 319 states and 383 transitions. [2019-11-23 22:07:41,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:07:41,314 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 184 [2019-11-23 22:07:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:41,316 INFO L225 Difference]: With dead ends: 319 [2019-11-23 22:07:41,316 INFO L226 Difference]: Without dead ends: 193 [2019-11-23 22:07:41,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=534, Invalid=656, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:07:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-23 22:07:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2019-11-23 22:07:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-23 22:07:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 223 transitions. [2019-11-23 22:07:41,321 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 223 transitions. Word has length 184 [2019-11-23 22:07:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:41,322 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 223 transitions. [2019-11-23 22:07:41,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:07:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 223 transitions. [2019-11-23 22:07:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-23 22:07:41,322 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:41,323 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:41,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:41,523 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:41,524 INFO L82 PathProgramCache]: Analyzing trace with hash 461407626, now seen corresponding path program 30 times [2019-11-23 22:07:41,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:41,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257451646] [2019-11-23 22:07:41,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 22:07:42,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257451646] [2019-11-23 22:07:42,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817108309] [2019-11-23 22:07:42,019 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:46,681 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 22:07:46,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:46,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 22:07:46,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:46,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:07:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 22:07:46,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:46,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2019-11-23 22:07:46,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31157999] [2019-11-23 22:07:46,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:07:46,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:46,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:07:46,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:07:46,770 INFO L87 Difference]: Start difference. First operand 191 states and 223 transitions. Second operand 36 states. [2019-11-23 22:07:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:47,099 INFO L93 Difference]: Finished difference Result 329 states and 395 transitions. [2019-11-23 22:07:47,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:07:47,099 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 190 [2019-11-23 22:07:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:47,101 INFO L225 Difference]: With dead ends: 329 [2019-11-23 22:07:47,101 INFO L226 Difference]: Without dead ends: 199 [2019-11-23 22:07:47,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=571, Invalid=761, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:07:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-11-23 22:07:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2019-11-23 22:07:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-23 22:07:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 230 transitions. [2019-11-23 22:07:47,107 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 230 transitions. Word has length 190 [2019-11-23 22:07:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:47,108 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 230 transitions. [2019-11-23 22:07:47,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:07:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 230 transitions. [2019-11-23 22:07:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-11-23 22:07:47,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:47,109 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:47,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:47,310 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1795678863, now seen corresponding path program 31 times [2019-11-23 22:07:47,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:47,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716264670] [2019-11-23 22:07:47,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-11-23 22:07:47,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716264670] [2019-11-23 22:07:47,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462840957] [2019-11-23 22:07:47,809 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:47,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 22:07:47,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2019-11-23 22:07:47,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:47,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-11-23 22:07:47,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269475124] [2019-11-23 22:07:47,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:07:47,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:47,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:07:47,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:07:47,961 INFO L87 Difference]: Start difference. First operand 197 states and 230 transitions. Second operand 36 states. [2019-11-23 22:07:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:48,308 INFO L93 Difference]: Finished difference Result 339 states and 407 transitions. [2019-11-23 22:07:48,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:07:48,309 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 196 [2019-11-23 22:07:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:48,311 INFO L225 Difference]: With dead ends: 339 [2019-11-23 22:07:48,311 INFO L226 Difference]: Without dead ends: 205 [2019-11-23 22:07:48,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=601, Invalid=731, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:07:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-23 22:07:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2019-11-23 22:07:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-11-23 22:07:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 237 transitions. [2019-11-23 22:07:48,319 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 237 transitions. Word has length 196 [2019-11-23 22:07:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:48,319 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 237 transitions. [2019-11-23 22:07:48,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:07:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 237 transitions. [2019-11-23 22:07:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-23 22:07:48,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:48,321 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:48,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:48,522 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:48,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:48,522 INFO L82 PathProgramCache]: Analyzing trace with hash 76316760, now seen corresponding path program 32 times [2019-11-23 22:07:48,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:48,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602239779] [2019-11-23 22:07:48,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2019-11-23 22:07:49,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602239779] [2019-11-23 22:07:49,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816871267] [2019-11-23 22:07:49,361 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:49,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:07:49,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:07:49,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:07:49,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:07:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2019-11-23 22:07:49,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:07:49,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-11-23 22:07:49,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889445882] [2019-11-23 22:07:49,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:07:49,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:07:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:07:49,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:07:49,508 INFO L87 Difference]: Start difference. First operand 203 states and 237 transitions. Second operand 37 states. [2019-11-23 22:07:49,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:07:49,845 INFO L93 Difference]: Finished difference Result 349 states and 419 transitions. [2019-11-23 22:07:49,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:07:49,846 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 202 [2019-11-23 22:07:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:07:49,847 INFO L225 Difference]: With dead ends: 349 [2019-11-23 22:07:49,847 INFO L226 Difference]: Without dead ends: 211 [2019-11-23 22:07:49,849 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=636, Invalid=770, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:07:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-11-23 22:07:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2019-11-23 22:07:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-11-23 22:07:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2019-11-23 22:07:49,856 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 202 [2019-11-23 22:07:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:07:49,856 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2019-11-23 22:07:49,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:07:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2019-11-23 22:07:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-23 22:07:49,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:07:49,859 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:07:50,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:07:50,063 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:07:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:07:50,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1168814529, now seen corresponding path program 33 times [2019-11-23 22:07:50,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:07:50,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780104728] [2019-11-23 22:07:50,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:07:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:07:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-11-23 22:07:50,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780104728] [2019-11-23 22:07:50,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367696223] [2019-11-23 22:07:50,838 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:01,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-11-23 22:08:01,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:01,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:08:01,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2019-11-23 22:08:01,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:01,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2019-11-23 22:08:01,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991834888] [2019-11-23 22:08:01,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:08:01,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:01,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:08:01,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:08:01,952 INFO L87 Difference]: Start difference. First operand 209 states and 244 transitions. Second operand 38 states. [2019-11-23 22:08:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:02,282 INFO L93 Difference]: Finished difference Result 359 states and 431 transitions. [2019-11-23 22:08:02,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:08:02,282 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 208 [2019-11-23 22:08:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:02,284 INFO L225 Difference]: With dead ends: 359 [2019-11-23 22:08:02,284 INFO L226 Difference]: Without dead ends: 217 [2019-11-23 22:08:02,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=672, Invalid=810, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:08:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-11-23 22:08:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2019-11-23 22:08:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-11-23 22:08:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 251 transitions. [2019-11-23 22:08:02,291 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 251 transitions. Word has length 208 [2019-11-23 22:08:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:02,291 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 251 transitions. [2019-11-23 22:08:02,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:08:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 251 transitions. [2019-11-23 22:08:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-23 22:08:02,293 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:02,293 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:02,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:02,501 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:02,502 INFO L82 PathProgramCache]: Analyzing trace with hash 222439206, now seen corresponding path program 34 times [2019-11-23 22:08:02,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:02,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512051946] [2019-11-23 22:08:02,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2019-11-23 22:08:03,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512051946] [2019-11-23 22:08:03,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554875872] [2019-11-23 22:08:03,089 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:03,200 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:03,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:03,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:08:03,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2019-11-23 22:08:03,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:03,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-11-23 22:08:03,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863224301] [2019-11-23 22:08:03,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:08:03,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:08:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:08:03,244 INFO L87 Difference]: Start difference. First operand 215 states and 251 transitions. Second operand 39 states. [2019-11-23 22:08:03,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:03,585 INFO L93 Difference]: Finished difference Result 369 states and 443 transitions. [2019-11-23 22:08:03,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:08:03,586 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 214 [2019-11-23 22:08:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:03,587 INFO L225 Difference]: With dead ends: 369 [2019-11-23 22:08:03,587 INFO L226 Difference]: Without dead ends: 223 [2019-11-23 22:08:03,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=709, Invalid=851, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:08:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-11-23 22:08:03,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2019-11-23 22:08:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-11-23 22:08:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 258 transitions. [2019-11-23 22:08:03,594 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 258 transitions. Word has length 214 [2019-11-23 22:08:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:03,594 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 258 transitions. [2019-11-23 22:08:03,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:08:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 258 transitions. [2019-11-23 22:08:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-11-23 22:08:03,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:03,595 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:03,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:03,797 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:03,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:03,798 INFO L82 PathProgramCache]: Analyzing trace with hash -786781427, now seen corresponding path program 35 times [2019-11-23 22:08:03,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:03,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845067639] [2019-11-23 22:08:03,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-11-23 22:08:04,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845067639] [2019-11-23 22:08:04,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85798220] [2019-11-23 22:08:04,397 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:07,301 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 22:08:07,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:07,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 22:08:07,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2019-11-23 22:08:07,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:07,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2019-11-23 22:08:07,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634306886] [2019-11-23 22:08:07,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:08:07,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:08:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:08:07,366 INFO L87 Difference]: Start difference. First operand 221 states and 258 transitions. Second operand 40 states. [2019-11-23 22:08:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:07,715 INFO L93 Difference]: Finished difference Result 379 states and 455 transitions. [2019-11-23 22:08:07,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:08:07,716 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 220 [2019-11-23 22:08:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:07,717 INFO L225 Difference]: With dead ends: 379 [2019-11-23 22:08:07,717 INFO L226 Difference]: Without dead ends: 229 [2019-11-23 22:08:07,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=747, Invalid=893, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:08:07,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-11-23 22:08:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2019-11-23 22:08:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-11-23 22:08:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 265 transitions. [2019-11-23 22:08:07,723 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 265 transitions. Word has length 220 [2019-11-23 22:08:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:07,724 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 265 transitions. [2019-11-23 22:08:07,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:08:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 265 transitions. [2019-11-23 22:08:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-23 22:08:07,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:07,725 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:07,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:07,933 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:07,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1283357172, now seen corresponding path program 36 times [2019-11-23 22:08:07,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:07,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674994890] [2019-11-23 22:08:07,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2019-11-23 22:08:08,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674994890] [2019-11-23 22:08:08,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242535516] [2019-11-23 22:08:08,571 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:38,038 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-11-23 22:08:38,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:38,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 22:08:38,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 2628 trivial. 0 not checked. [2019-11-23 22:08:38,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:38,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2019-11-23 22:08:38,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614782126] [2019-11-23 22:08:38,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:08:38,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:38,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:08:38,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:08:38,166 INFO L87 Difference]: Start difference. First operand 227 states and 265 transitions. Second operand 41 states. [2019-11-23 22:08:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:38,520 INFO L93 Difference]: Finished difference Result 389 states and 467 transitions. [2019-11-23 22:08:38,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:08:38,520 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 226 [2019-11-23 22:08:38,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:38,522 INFO L225 Difference]: With dead ends: 389 [2019-11-23 22:08:38,522 INFO L226 Difference]: Without dead ends: 235 [2019-11-23 22:08:38,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=786, Invalid=936, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:08:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-11-23 22:08:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2019-11-23 22:08:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-11-23 22:08:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 272 transitions. [2019-11-23 22:08:38,528 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 272 transitions. Word has length 226 [2019-11-23 22:08:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:38,529 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 272 transitions. [2019-11-23 22:08:38,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:08:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 272 transitions. [2019-11-23 22:08:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-23 22:08:38,530 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:38,530 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:38,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:38,742 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:38,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:38,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1360710693, now seen corresponding path program 37 times [2019-11-23 22:08:38,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:38,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113888903] [2019-11-23 22:08:38,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-23 22:08:39,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113888903] [2019-11-23 22:08:39,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914262539] [2019-11-23 22:08:39,463 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:39,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 22:08:39,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2019-11-23 22:08:39,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:39,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2019-11-23 22:08:39,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268445593] [2019-11-23 22:08:39,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:08:39,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:39,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:08:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:08:39,640 INFO L87 Difference]: Start difference. First operand 233 states and 272 transitions. Second operand 42 states. [2019-11-23 22:08:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:40,010 INFO L93 Difference]: Finished difference Result 399 states and 479 transitions. [2019-11-23 22:08:40,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:08:40,010 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 232 [2019-11-23 22:08:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:40,011 INFO L225 Difference]: With dead ends: 399 [2019-11-23 22:08:40,012 INFO L226 Difference]: Without dead ends: 241 [2019-11-23 22:08:40,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=826, Invalid=980, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:08:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-11-23 22:08:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2019-11-23 22:08:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2019-11-23 22:08:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 279 transitions. [2019-11-23 22:08:40,017 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 279 transitions. Word has length 232 [2019-11-23 22:08:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:40,018 INFO L462 AbstractCegarLoop]: Abstraction has 239 states and 279 transitions. [2019-11-23 22:08:40,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:08:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 279 transitions. [2019-11-23 22:08:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-11-23 22:08:40,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:40,019 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:40,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:40,223 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:40,224 INFO L82 PathProgramCache]: Analyzing trace with hash 111048898, now seen corresponding path program 38 times [2019-11-23 22:08:40,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:40,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028026075] [2019-11-23 22:08:40,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2019-11-23 22:08:41,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028026075] [2019-11-23 22:08:41,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7797268] [2019-11-23 22:08:41,022 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:41,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:08:41,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:41,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:08:41,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2019-11-23 22:08:41,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:41,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2019-11-23 22:08:41,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126730615] [2019-11-23 22:08:41,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:08:41,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:41,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:08:41,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:08:41,193 INFO L87 Difference]: Start difference. First operand 239 states and 279 transitions. Second operand 43 states. [2019-11-23 22:08:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:41,586 INFO L93 Difference]: Finished difference Result 409 states and 491 transitions. [2019-11-23 22:08:41,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:08:41,586 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 238 [2019-11-23 22:08:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:41,588 INFO L225 Difference]: With dead ends: 409 [2019-11-23 22:08:41,588 INFO L226 Difference]: Without dead ends: 247 [2019-11-23 22:08:41,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=867, Invalid=1025, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:08:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-11-23 22:08:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 245. [2019-11-23 22:08:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-11-23 22:08:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 286 transitions. [2019-11-23 22:08:41,595 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 286 transitions. Word has length 238 [2019-11-23 22:08:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:41,596 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 286 transitions. [2019-11-23 22:08:41,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:08:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 286 transitions. [2019-11-23 22:08:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-11-23 22:08:41,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:41,599 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:08:41,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:41,804 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:41,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1227757399, now seen corresponding path program 39 times [2019-11-23 22:08:41,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:41,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049922898] [2019-11-23 22:08:41,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2019-11-23 22:08:42,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049922898] [2019-11-23 22:08:42,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455817041] [2019-11-23 22:08:42,676 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true