/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/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 19:16:10,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 19:16:10,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 19:16:10,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 19:16:10,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 19:16:10,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 19:16:10,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 19:16:10,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 19:16:10,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 19:16:10,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 19:16:10,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 19:16:10,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 19:16:10,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 19:16:10,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 19:16:10,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 19:16:10,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 19:16:10,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 19:16:10,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 19:16:10,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 19:16:10,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 19:16:10,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 19:16:10,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 19:16:10,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 19:16:10,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 19:16:10,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 19:16:10,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 19:16:10,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 19:16:10,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 19:16:10,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 19:16:10,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 19:16:10,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 19:16:10,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 19:16:10,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 19:16:10,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 19:16:10,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 19:16:10,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 19:16:10,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 19:16:10,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 19:16:10,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 19:16:10,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 19:16:10,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 19:16:10,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-MCR.epf [2019-12-27 19:16:10,320 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 19:16:10,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 19:16:10,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 19:16:10,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 19:16:10,325 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 19:16:10,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 19:16:10,326 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 19:16:10,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 19:16:10,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 19:16:10,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 19:16:10,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 19:16:10,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 19:16:10,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 19:16:10,329 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 19:16:10,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 19:16:10,329 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 19:16:10,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 19:16:10,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 19:16:10,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 19:16:10,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 19:16:10,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 19:16:10,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 19:16:10,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 19:16:10,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 19:16:10,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 19:16:10,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 19:16:10,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 19:16:10,332 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 19:16:10,332 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 19:16:10,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 19:16:10,332 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 19:16:10,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 19:16:10,635 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 19:16:10,651 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 19:16:10,654 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 19:16:10,656 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 19:16:10,656 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 19:16:10,657 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2019-12-27 19:16:10,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1baf3a62/a783310a83f14cd1bb5aed823232a3a9/FLAG11ded14db [2019-12-27 19:16:11,273 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 19:16:11,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2019-12-27 19:16:11,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1baf3a62/a783310a83f14cd1bb5aed823232a3a9/FLAG11ded14db [2019-12-27 19:16:11,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1baf3a62/a783310a83f14cd1bb5aed823232a3a9 [2019-12-27 19:16:11,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 19:16:11,582 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 19:16:11,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 19:16:11,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 19:16:11,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 19:16:11,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:16:11" (1/1) ... [2019-12-27 19:16:11,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e74f9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:11, skipping insertion in model container [2019-12-27 19:16:11,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:16:11" (1/1) ... [2019-12-27 19:16:11,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 19:16:11,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 19:16:12,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:16:12,062 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 19:16:12,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:16:12,183 INFO L208 MainTranslator]: Completed translation [2019-12-27 19:16:12,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12 WrapperNode [2019-12-27 19:16:12,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 19:16:12,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 19:16:12,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 19:16:12,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 19:16:12,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (1/1) ... [2019-12-27 19:16:12,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (1/1) ... [2019-12-27 19:16:12,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 19:16:12,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 19:16:12,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 19:16:12,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 19:16:12,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (1/1) ... [2019-12-27 19:16:12,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (1/1) ... [2019-12-27 19:16:12,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (1/1) ... [2019-12-27 19:16:12,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (1/1) ... [2019-12-27 19:16:12,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (1/1) ... [2019-12-27 19:16:12,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (1/1) ... [2019-12-27 19:16:12,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (1/1) ... [2019-12-27 19:16:12,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 19:16:12,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 19:16:12,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 19:16:12,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 19:16:12,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (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 [2019-12-27 19:16:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 19:16:12,327 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 19:16:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 19:16:12,328 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 19:16:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 19:16:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 19:16:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 19:16:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 19:16:12,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 19:16:12,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 19:16:12,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 19:16:12,331 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 19:16:12,707 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 19:16:12,707 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 19:16:12,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:16:12 BoogieIcfgContainer [2019-12-27 19:16:12,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 19:16:12,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 19:16:12,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 19:16:12,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 19:16:12,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 07:16:11" (1/3) ... [2019-12-27 19:16:12,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9e6cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:16:12, skipping insertion in model container [2019-12-27 19:16:12,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:16:12" (2/3) ... [2019-12-27 19:16:12,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9e6cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:16:12, skipping insertion in model container [2019-12-27 19:16:12,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:16:12" (3/3) ... [2019-12-27 19:16:12,716 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2019-12-27 19:16:12,727 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 19:16:12,727 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 19:16:12,733 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 19:16:12,734 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 19:16:12,760 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,760 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,761 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,761 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,761 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,762 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,762 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,762 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,762 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,762 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,763 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,763 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,763 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,763 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,764 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,764 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,765 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,765 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,765 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,765 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,766 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,766 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,766 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,767 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,767 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,767 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,767 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,768 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,768 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,768 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,772 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,773 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,773 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,773 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,773 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,774 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,785 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,785 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,785 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,786 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,786 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,786 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:16:12,804 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 19:16:12,820 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 19:16:12,821 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 19:16:12,821 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 19:16:12,821 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 19:16:12,821 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 19:16:12,821 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 19:16:12,822 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 19:16:12,822 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 19:16:12,835 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 19:16:12,837 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 19:16:12,885 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 19:16:12,886 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 19:16:12,892 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 19:16:12,895 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 19:16:12,913 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 19:16:12,914 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 19:16:12,915 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 19:16:12,918 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 19:16:12,920 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 19:16:14,152 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 19:16:14,283 INFO L206 etLargeBlockEncoding]: Checked pairs total: 695 [2019-12-27 19:16:14,283 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 19:16:14,287 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 19:16:14,297 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 19:16:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 19:16:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 19:16:14,306 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:14,307 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 19:16:14,307 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:14,316 INFO L82 PathProgramCache]: Analyzing trace with hash 213401609, now seen corresponding path program 1 times [2019-12-27 19:16:14,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:14,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873223248] [2019-12-27 19:16:14,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:14,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873223248] [2019-12-27 19:16:14,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:14,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 19:16:14,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1249908573] [2019-12-27 19:16:14,542 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:14,548 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:14,561 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 19:16:14,562 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:14,566 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:14,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 19:16:14,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:14,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 19:16:14,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 19:16:14,589 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 19:16:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:14,623 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 19:16:14,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 19:16:14,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 19:16:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:14,638 INFO L225 Difference]: With dead ends: 54 [2019-12-27 19:16:14,638 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 19:16:14,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 19:16:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 19:16:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 19:16:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 19:16:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 19:16:14,687 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 19:16:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:14,687 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 19:16:14,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 19:16:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 19:16:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 19:16:14,688 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:14,689 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:14,689 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:14,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1054417208, now seen corresponding path program 1 times [2019-12-27 19:16:14,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:14,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271624447] [2019-12-27 19:16:14,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:14,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271624447] [2019-12-27 19:16:14,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:14,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 19:16:14,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1642380249] [2019-12-27 19:16:14,785 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:14,786 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:14,794 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 19:16:14,794 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:14,796 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:14,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 19:16:14,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:14,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 19:16:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 19:16:14,798 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 19:16:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:14,837 INFO L93 Difference]: Finished difference Result 46 states and 98 transitions. [2019-12-27 19:16:14,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 19:16:14,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 19:16:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:14,840 INFO L225 Difference]: With dead ends: 46 [2019-12-27 19:16:14,840 INFO L226 Difference]: Without dead ends: 45 [2019-12-27 19:16:14,842 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:16:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-27 19:16:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-12-27 19:16:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-27 19:16:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 92 transitions. [2019-12-27 19:16:14,856 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 92 transitions. Word has length 7 [2019-12-27 19:16:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:14,857 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 92 transitions. [2019-12-27 19:16:14,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 19:16:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 92 transitions. [2019-12-27 19:16:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 19:16:14,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:14,858 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:14,859 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1079482909, now seen corresponding path program 1 times [2019-12-27 19:16:14,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:14,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88575302] [2019-12-27 19:16:14,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:14,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88575302] [2019-12-27 19:16:14,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:14,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 19:16:14,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1662088217] [2019-12-27 19:16:14,961 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:14,961 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:14,962 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 8 states and 7 transitions. [2019-12-27 19:16:14,963 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:14,963 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:14,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 19:16:14,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 19:16:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 19:16:14,964 INFO L87 Difference]: Start difference. First operand 41 states and 92 transitions. Second operand 4 states. [2019-12-27 19:16:14,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:14,997 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 19:16:14,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 19:16:14,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 19:16:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:14,999 INFO L225 Difference]: With dead ends: 51 [2019-12-27 19:16:14,999 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 19:16:14,999 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:16:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 19:16:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 19:16:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 19:16:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 19:16:15,007 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 19:16:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:15,008 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 19:16:15,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 19:16:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 19:16:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 19:16:15,009 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:15,009 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:15,009 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:15,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1673617116, now seen corresponding path program 2 times [2019-12-27 19:16:15,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:15,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425806668] [2019-12-27 19:16:15,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:15,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425806668] [2019-12-27 19:16:15,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202789640] [2019-12-27 19:16:15,082 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 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 [2019-12-27 19:16:15,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:15,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:15,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:16:15,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:15,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:15,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 19:16:15,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [374130902] [2019-12-27 19:16:15,247 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:15,248 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:15,250 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 20 transitions. [2019-12-27 19:16:15,251 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:15,251 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:15,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:16:15,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:15,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:16:15,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 19:16:15,253 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 5 states. [2019-12-27 19:16:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:15,312 INFO L93 Difference]: Finished difference Result 60 states and 126 transitions. [2019-12-27 19:16:15,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:16:15,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 19:16:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:15,316 INFO L225 Difference]: With dead ends: 60 [2019-12-27 19:16:15,316 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 19:16:15,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 19:16:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2019-12-27 19:16:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 19:16:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2019-12-27 19:16:15,332 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 8 [2019-12-27 19:16:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:15,332 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2019-12-27 19:16:15,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:16:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2019-12-27 19:16:15,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 19:16:15,335 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:15,335 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:15,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:15,541 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash 895768402, now seen corresponding path program 2 times [2019-12-27 19:16:15,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:15,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943307631] [2019-12-27 19:16:15,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:15,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943307631] [2019-12-27 19:16:15,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707788799] [2019-12-27 19:16:15,627 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 [2019-12-27 19:16:15,673 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:15,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:15,674 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:16:15,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:15,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:15,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 19:16:15,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [628067237] [2019-12-27 19:16:15,723 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:15,724 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:15,725 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 9 states and 8 transitions. [2019-12-27 19:16:15,725 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:15,725 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:15,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:16:15,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:15,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:16:15,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 19:16:15,727 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand 5 states. [2019-12-27 19:16:15,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:15,774 INFO L93 Difference]: Finished difference Result 61 states and 132 transitions. [2019-12-27 19:16:15,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:16:15,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 19:16:15,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:15,779 INFO L225 Difference]: With dead ends: 61 [2019-12-27 19:16:15,779 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 19:16:15,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:15,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 19:16:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-12-27 19:16:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 19:16:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 19:16:15,787 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 19:16:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:15,787 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 19:16:15,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:16:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 19:16:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:16:15,788 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:15,788 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:15,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:15,991 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:15,992 INFO L82 PathProgramCache]: Analyzing trace with hash 343335240, now seen corresponding path program 3 times [2019-12-27 19:16:15,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:15,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170980138] [2019-12-27 19:16:15,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:16,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170980138] [2019-12-27 19:16:16,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193600233] [2019-12-27 19:16:16,090 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 [2019-12-27 19:16:16,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:16,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:16,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:16,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:16,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:16,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:16,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [414989448] [2019-12-27 19:16:16,223 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:16,224 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:16,226 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2019-12-27 19:16:16,226 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:16,226 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:16,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:16,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:16,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:16,228 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 6 states. [2019-12-27 19:16:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:16,304 INFO L93 Difference]: Finished difference Result 72 states and 152 transitions. [2019-12-27 19:16:16,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:16,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 19:16:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:16,306 INFO L225 Difference]: With dead ends: 72 [2019-12-27 19:16:16,306 INFO L226 Difference]: Without dead ends: 71 [2019-12-27 19:16:16,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:16,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-27 19:16:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2019-12-27 19:16:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 19:16:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 136 transitions. [2019-12-27 19:16:16,316 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 136 transitions. Word has length 9 [2019-12-27 19:16:16,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:16,316 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 136 transitions. [2019-12-27 19:16:16,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:16,316 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 136 transitions. [2019-12-27 19:16:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:16:16,317 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:16,317 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:16,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:16,527 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash 317346018, now seen corresponding path program 1 times [2019-12-27 19:16:16,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:16,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108047844] [2019-12-27 19:16:16,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:16,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108047844] [2019-12-27 19:16:16,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:16,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 19:16:16,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2041495829] [2019-12-27 19:16:16,583 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:16,584 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:16,585 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 19:16:16,586 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:16,586 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:16,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:16:16,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:16,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:16:16,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:16:16,587 INFO L87 Difference]: Start difference. First operand 60 states and 136 transitions. Second operand 5 states. [2019-12-27 19:16:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:16,629 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-27 19:16:16,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:16:16,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 19:16:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:16,630 INFO L225 Difference]: With dead ends: 70 [2019-12-27 19:16:16,630 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 19:16:16,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-27 19:16:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 19:16:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-12-27 19:16:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-27 19:16:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 139 transitions. [2019-12-27 19:16:16,637 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 139 transitions. Word has length 9 [2019-12-27 19:16:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:16,638 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 139 transitions. [2019-12-27 19:16:16,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:16:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 139 transitions. [2019-12-27 19:16:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:16:16,639 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:16,639 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:16,640 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash -463142532, now seen corresponding path program 2 times [2019-12-27 19:16:16,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:16,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417251658] [2019-12-27 19:16:16,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:16,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417251658] [2019-12-27 19:16:16,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:16:16,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 19:16:16,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [230577330] [2019-12-27 19:16:16,706 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:16,707 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:16,709 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 19:16:16,709 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:16,715 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:16,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:16:16,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:16,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:16:16,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:16:16,716 INFO L87 Difference]: Start difference. First operand 63 states and 139 transitions. Second operand 5 states. [2019-12-27 19:16:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:16,754 INFO L93 Difference]: Finished difference Result 70 states and 150 transitions. [2019-12-27 19:16:16,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:16:16,755 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 19:16:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:16,756 INFO L225 Difference]: With dead ends: 70 [2019-12-27 19:16:16,756 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 19:16:16,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-27 19:16:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 19:16:16,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2019-12-27 19:16:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 19:16:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 140 transitions. [2019-12-27 19:16:16,767 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 140 transitions. Word has length 9 [2019-12-27 19:16:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:16,768 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 140 transitions. [2019-12-27 19:16:16,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:16:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 140 transitions. [2019-12-27 19:16:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:16:16,769 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:16,769 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:16,769 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:16,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1999016899, now seen corresponding path program 3 times [2019-12-27 19:16:16,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:16,773 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757054979] [2019-12-27 19:16:16,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:16,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757054979] [2019-12-27 19:16:16,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346194622] [2019-12-27 19:16:16,860 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 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 [2019-12-27 19:16:16,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:16,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:16,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:16,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:16,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:16,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:16,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [820463601] [2019-12-27 19:16:16,962 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:16,962 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:16,964 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 10 states and 9 transitions. [2019-12-27 19:16:16,964 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:16,964 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:16,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:16,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:16,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:16,965 INFO L87 Difference]: Start difference. First operand 64 states and 140 transitions. Second operand 6 states. [2019-12-27 19:16:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:17,042 INFO L93 Difference]: Finished difference Result 75 states and 160 transitions. [2019-12-27 19:16:17,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:17,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 19:16:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:17,044 INFO L225 Difference]: With dead ends: 75 [2019-12-27 19:16:17,044 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 19:16:17,047 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 19:16:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2019-12-27 19:16:17,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 19:16:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 19:16:17,061 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 19:16:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:17,062 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 19:16:17,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 19:16:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:17,063 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:17,063 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:17,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:17,278 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2054270044, now seen corresponding path program 4 times [2019-12-27 19:16:17,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:17,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910647035] [2019-12-27 19:16:17,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:17,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910647035] [2019-12-27 19:16:17,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437313660] [2019-12-27 19:16:17,379 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 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 [2019-12-27 19:16:17,430 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:17,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:17,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:17,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:17,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:17,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:17,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1105079498] [2019-12-27 19:16:17,546 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:17,547 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:17,549 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 30 transitions. [2019-12-27 19:16:17,549 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:17,549 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:17,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:17,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:17,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:17,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:17,553 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 7 states. [2019-12-27 19:16:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:17,663 INFO L93 Difference]: Finished difference Result 86 states and 180 transitions. [2019-12-27 19:16:17,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:17,664 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 19:16:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:17,665 INFO L225 Difference]: With dead ends: 86 [2019-12-27 19:16:17,665 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 19:16:17,666 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:17,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 19:16:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2019-12-27 19:16:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 19:16:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-27 19:16:17,670 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-27 19:16:17,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:17,671 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-27 19:16:17,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:17,671 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-27 19:16:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:17,672 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:17,672 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:17,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:17,878 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2028280822, now seen corresponding path program 3 times [2019-12-27 19:16:17,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:17,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321953911] [2019-12-27 19:16:17,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:17,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321953911] [2019-12-27 19:16:17,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096194349] [2019-12-27 19:16:17,961 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 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 [2019-12-27 19:16:18,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:18,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:18,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:18,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:18,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:18,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:18,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1748646280] [2019-12-27 19:16:18,074 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:18,080 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:18,082 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 28 transitions. [2019-12-27 19:16:18,083 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:18,083 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:18,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:18,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:18,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:18,084 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 6 states. [2019-12-27 19:16:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:18,159 INFO L93 Difference]: Finished difference Result 85 states and 182 transitions. [2019-12-27 19:16:18,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:18,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:18,160 INFO L225 Difference]: With dead ends: 85 [2019-12-27 19:16:18,161 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 19:16:18,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 19:16:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2019-12-27 19:16:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 19:16:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 162 transitions. [2019-12-27 19:16:18,172 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 162 transitions. Word has length 10 [2019-12-27 19:16:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:18,172 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 162 transitions. [2019-12-27 19:16:18,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:18,173 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 162 transitions. [2019-12-27 19:16:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:18,174 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:18,174 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:18,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:18,383 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:18,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792179, now seen corresponding path program 4 times [2019-12-27 19:16:18,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:18,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906274887] [2019-12-27 19:16:18,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:18,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906274887] [2019-12-27 19:16:18,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537427308] [2019-12-27 19:16:18,459 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 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 [2019-12-27 19:16:18,498 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:18,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:18,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:18,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:18,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:18,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:18,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1994848765] [2019-12-27 19:16:18,615 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:18,616 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:18,618 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 19:16:18,618 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:18,618 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:18,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:18,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:18,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:18,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:18,619 INFO L87 Difference]: Start difference. First operand 72 states and 162 transitions. Second operand 6 states. [2019-12-27 19:16:18,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:18,737 INFO L93 Difference]: Finished difference Result 87 states and 184 transitions. [2019-12-27 19:16:18,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:18,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:18,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:18,739 INFO L225 Difference]: With dead ends: 87 [2019-12-27 19:16:18,739 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 19:16:18,740 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 19:16:18,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2019-12-27 19:16:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 19:16:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2019-12-27 19:16:18,745 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 10 [2019-12-27 19:16:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:18,746 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2019-12-27 19:16:18,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2019-12-27 19:16:18,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:18,747 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:18,747 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:18,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:18,960 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:18,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:18,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1247792272, now seen corresponding path program 5 times [2019-12-27 19:16:18,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:18,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423942549] [2019-12-27 19:16:18,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:19,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423942549] [2019-12-27 19:16:19,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404354967] [2019-12-27 19:16:19,027 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 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 [2019-12-27 19:16:19,074 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:19,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:19,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:19,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:19,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:19,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:19,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2140790309] [2019-12-27 19:16:19,136 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:19,137 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:19,141 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 19:16:19,142 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:19,142 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:19,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:19,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:19,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:19,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:19,144 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand 6 states. [2019-12-27 19:16:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:19,250 INFO L93 Difference]: Finished difference Result 88 states and 188 transitions. [2019-12-27 19:16:19,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:19,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:19,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:19,252 INFO L225 Difference]: With dead ends: 88 [2019-12-27 19:16:19,252 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 19:16:19,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 19:16:19,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2019-12-27 19:16:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 19:16:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 169 transitions. [2019-12-27 19:16:19,268 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 169 transitions. Word has length 10 [2019-12-27 19:16:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:19,269 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 169 transitions. [2019-12-27 19:16:19,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 169 transitions. [2019-12-27 19:16:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:19,290 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:19,290 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:19,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:19,496 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:19,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:19,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1472519181, now seen corresponding path program 6 times [2019-12-27 19:16:19,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:19,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008521715] [2019-12-27 19:16:19,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:19,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008521715] [2019-12-27 19:16:19,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407486522] [2019-12-27 19:16:19,588 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 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 [2019-12-27 19:16:19,632 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:19,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:19,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:19,634 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:19,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:19,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:19,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [546861582] [2019-12-27 19:16:19,692 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:19,692 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:19,694 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 20 transitions. [2019-12-27 19:16:19,694 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:19,695 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:19,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:19,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:19,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:19,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:19,697 INFO L87 Difference]: Start difference. First operand 76 states and 169 transitions. Second operand 6 states. [2019-12-27 19:16:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:19,770 INFO L93 Difference]: Finished difference Result 88 states and 188 transitions. [2019-12-27 19:16:19,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:19,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:19,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:19,772 INFO L225 Difference]: With dead ends: 88 [2019-12-27 19:16:19,772 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 19:16:19,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 19:16:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2019-12-27 19:16:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 19:16:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 165 transitions. [2019-12-27 19:16:19,776 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 165 transitions. Word has length 10 [2019-12-27 19:16:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:19,777 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 165 transitions. [2019-12-27 19:16:19,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 165 transitions. [2019-12-27 19:16:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:19,778 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:19,778 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:19,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:19,986 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:19,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:19,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1472516391, now seen corresponding path program 7 times [2019-12-27 19:16:19,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:19,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030995332] [2019-12-27 19:16:19,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:20,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030995332] [2019-12-27 19:16:20,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429582395] [2019-12-27 19:16:20,070 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 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 [2019-12-27 19:16:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:20,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:20,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:20,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:20,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:20,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [17474079] [2019-12-27 19:16:20,200 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:20,201 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:20,209 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 19:16:20,209 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:20,210 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:20,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:20,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:20,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:20,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:20,211 INFO L87 Difference]: Start difference. First operand 75 states and 165 transitions. Second operand 6 states. [2019-12-27 19:16:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:20,293 INFO L93 Difference]: Finished difference Result 87 states and 184 transitions. [2019-12-27 19:16:20,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:20,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:20,294 INFO L225 Difference]: With dead ends: 87 [2019-12-27 19:16:20,295 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 19:16:20,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 19:16:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2019-12-27 19:16:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 19:16:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 169 transitions. [2019-12-27 19:16:20,299 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 169 transitions. Word has length 10 [2019-12-27 19:16:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:20,299 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 169 transitions. [2019-12-27 19:16:20,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 169 transitions. [2019-12-27 19:16:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:20,300 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:20,300 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:20,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:20,504 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:20,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1472516298, now seen corresponding path program 8 times [2019-12-27 19:16:20,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:20,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407124375] [2019-12-27 19:16:20,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:20,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407124375] [2019-12-27 19:16:20,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043337095] [2019-12-27 19:16:20,576 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 19:16:20,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:20,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:20,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:16:20,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:20,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:20,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 19:16:20,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [663770032] [2019-12-27 19:16:20,662 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:20,663 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:20,664 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 19:16:20,665 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:20,666 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:20,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:16:20,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:20,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:16:20,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:16:20,667 INFO L87 Difference]: Start difference. First operand 76 states and 169 transitions. Second operand 6 states. [2019-12-27 19:16:20,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:20,740 INFO L93 Difference]: Finished difference Result 86 states and 183 transitions. [2019-12-27 19:16:20,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:16:20,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:16:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:20,742 INFO L225 Difference]: With dead ends: 86 [2019-12-27 19:16:20,742 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 19:16:20,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:16:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 19:16:20,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2019-12-27 19:16:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 19:16:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2019-12-27 19:16:20,748 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 10 [2019-12-27 19:16:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:20,748 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2019-12-27 19:16:20,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:16:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2019-12-27 19:16:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:16:20,749 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:20,749 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:20,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:20,953 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1839981938, now seen corresponding path program 4 times [2019-12-27 19:16:20,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:20,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722792084] [2019-12-27 19:16:20,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:21,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722792084] [2019-12-27 19:16:21,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780214812] [2019-12-27 19:16:21,012 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 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 [2019-12-27 19:16:21,066 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:21,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:21,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:21,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:21,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:21,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:21,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [405577896] [2019-12-27 19:16:21,164 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:21,164 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:21,165 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 11 states and 10 transitions. [2019-12-27 19:16:21,166 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:21,166 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:21,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:21,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:21,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:21,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:21,167 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand 7 states. [2019-12-27 19:16:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:21,298 INFO L93 Difference]: Finished difference Result 90 states and 192 transitions. [2019-12-27 19:16:21,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:21,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 19:16:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:21,300 INFO L225 Difference]: With dead ends: 90 [2019-12-27 19:16:21,300 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 19:16:21,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:21,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 19:16:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-12-27 19:16:21,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 19:16:21,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 19:16:21,305 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 19:16:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:21,306 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 19:16:21,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:21,306 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 19:16:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:21,306 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:21,306 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:21,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:21,516 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash -741325880, now seen corresponding path program 5 times [2019-12-27 19:16:21,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:21,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837501692] [2019-12-27 19:16:21,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:21,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837501692] [2019-12-27 19:16:21,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527851968] [2019-12-27 19:16:21,597 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 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 [2019-12-27 19:16:21,678 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:21,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:21,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:21,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:21,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:21,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:21,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [88066572] [2019-12-27 19:16:21,825 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:21,827 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:21,835 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 19:16:21,835 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:21,836 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:21,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:21,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:21,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:21,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:21,841 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 8 states. [2019-12-27 19:16:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:22,022 INFO L93 Difference]: Finished difference Result 101 states and 212 transitions. [2019-12-27 19:16:22,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:22,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 19:16:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:22,024 INFO L225 Difference]: With dead ends: 101 [2019-12-27 19:16:22,024 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 19:16:22,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 19:16:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2019-12-27 19:16:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:16:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 19:16:22,029 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 19:16:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:22,030 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 19:16:22,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 19:16:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:22,031 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:22,031 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:22,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:22,231 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:22,232 INFO L82 PathProgramCache]: Analyzing trace with hash -767315102, now seen corresponding path program 9 times [2019-12-27 19:16:22,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:22,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267632308] [2019-12-27 19:16:22,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:22,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267632308] [2019-12-27 19:16:22,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234274356] [2019-12-27 19:16:22,323 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 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 [2019-12-27 19:16:22,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:22,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:22,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:22,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:22,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:22,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:22,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [788983903] [2019-12-27 19:16:22,507 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:22,508 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:22,512 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 19:16:22,512 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:22,512 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:22,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:22,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:22,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:22,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:22,514 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 19:16:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:22,630 INFO L93 Difference]: Finished difference Result 102 states and 219 transitions. [2019-12-27 19:16:22,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:22,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:22,632 INFO L225 Difference]: With dead ends: 102 [2019-12-27 19:16:22,632 INFO L226 Difference]: Without dead ends: 101 [2019-12-27 19:16:22,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-27 19:16:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2019-12-27 19:16:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:16:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 19:16:22,636 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 19:16:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:22,636 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 19:16:22,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 19:16:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:22,637 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:22,637 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:22,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:22,840 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:22,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803745, now seen corresponding path program 10 times [2019-12-27 19:16:22,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:22,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779701303] [2019-12-27 19:16:22,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:22,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779701303] [2019-12-27 19:16:22,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139161723] [2019-12-27 19:16:22,917 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 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 [2019-12-27 19:16:22,981 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:22,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:22,982 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:22,984 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:23,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:23,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:23,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1759505682] [2019-12-27 19:16:23,084 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:23,085 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:23,087 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 19:16:23,087 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:23,087 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:23,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:23,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:23,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:23,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:23,088 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 19:16:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:23,186 INFO L93 Difference]: Finished difference Result 105 states and 225 transitions. [2019-12-27 19:16:23,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:23,187 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:23,188 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:23,188 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:23,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:23,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2019-12-27 19:16:23,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:16:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 19:16:23,191 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 19:16:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:23,192 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 19:16:23,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 19:16:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:23,193 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:23,193 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:23,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:23,396 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:23,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1547803652, now seen corresponding path program 11 times [2019-12-27 19:16:23,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:23,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051356821] [2019-12-27 19:16:23,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:23,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051356821] [2019-12-27 19:16:23,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951258090] [2019-12-27 19:16:23,464 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 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 [2019-12-27 19:16:23,510 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:23,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:23,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:23,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:23,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:23,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:23,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1360677255] [2019-12-27 19:16:23,642 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:23,643 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:23,645 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 19:16:23,645 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:23,645 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:23,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:23,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:23,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:23,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:23,646 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 19:16:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:23,786 INFO L93 Difference]: Finished difference Result 105 states and 225 transitions. [2019-12-27 19:16:23,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:23,787 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:23,788 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:23,788 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:23,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2019-12-27 19:16:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 19:16:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2019-12-27 19:16:23,793 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 11 [2019-12-27 19:16:23,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:23,793 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2019-12-27 19:16:23,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2019-12-27 19:16:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:23,794 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:23,794 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:23,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:23,997 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:23,998 INFO L82 PathProgramCache]: Analyzing trace with hash 26852098, now seen corresponding path program 12 times [2019-12-27 19:16:23,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:23,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094610591] [2019-12-27 19:16:23,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094610591] [2019-12-27 19:16:24,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533980883] [2019-12-27 19:16:24,061 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 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 [2019-12-27 19:16:24,104 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:24,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:24,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:24,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:24,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:24,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1600487218] [2019-12-27 19:16:24,188 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:24,189 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:24,190 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:16:24,190 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:24,191 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:24,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:24,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:24,192 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand 7 states. [2019-12-27 19:16:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:24,300 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2019-12-27 19:16:24,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:24,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:24,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:24,302 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:24,302 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:24,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:24,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2019-12-27 19:16:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:16:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 19:16:24,306 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 19:16:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:24,306 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 19:16:24,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 19:16:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:24,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:24,307 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:24,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:24,511 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:24,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:24,512 INFO L82 PathProgramCache]: Analyzing trace with hash 26852191, now seen corresponding path program 13 times [2019-12-27 19:16:24,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:24,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753106464] [2019-12-27 19:16:24,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753106464] [2019-12-27 19:16:24,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012347335] [2019-12-27 19:16:24,573 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 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 [2019-12-27 19:16:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:24,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:24,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:24,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:24,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:24,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [975741989] [2019-12-27 19:16:24,725 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:24,726 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:24,728 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:16:24,728 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:24,728 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:24,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:24,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:24,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:24,729 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 7 states. [2019-12-27 19:16:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:24,837 INFO L93 Difference]: Finished difference Result 108 states and 231 transitions. [2019-12-27 19:16:24,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:24,838 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:24,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:24,839 INFO L225 Difference]: With dead ends: 108 [2019-12-27 19:16:24,839 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 19:16:24,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 19:16:24,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2019-12-27 19:16:24,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:24,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:24,843 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:24,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:24,844 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:24,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:24,844 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:24,844 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:24,845 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:25,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:25,048 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash 26854981, now seen corresponding path program 14 times [2019-12-27 19:16:25,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:25,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448571234] [2019-12-27 19:16:25,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:25,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448571234] [2019-12-27 19:16:25,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010727789] [2019-12-27 19:16:25,118 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 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 [2019-12-27 19:16:25,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:25,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:25,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:25,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:25,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:25,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:25,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1955029839] [2019-12-27 19:16:25,228 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:25,229 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:25,231 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:16:25,231 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:25,231 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:25,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:25,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:25,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:25,232 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:25,364 INFO L93 Difference]: Finished difference Result 109 states and 235 transitions. [2019-12-27 19:16:25,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:25,364 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:25,365 INFO L225 Difference]: With dead ends: 109 [2019-12-27 19:16:25,365 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 19:16:25,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 19:16:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2019-12-27 19:16:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:25,370 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:25,370 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:25,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:25,371 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:25,371 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:25,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:25,575 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:25,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:25,575 INFO L82 PathProgramCache]: Analyzing trace with hash 26855074, now seen corresponding path program 15 times [2019-12-27 19:16:25,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:25,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977779354] [2019-12-27 19:16:25,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:25,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977779354] [2019-12-27 19:16:25,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608737762] [2019-12-27 19:16:25,638 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 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 [2019-12-27 19:16:25,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:16:25,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:25,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:25,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:25,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:25,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:25,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1008469619] [2019-12-27 19:16:25,759 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:25,760 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:25,762 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:16:25,762 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:25,762 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:25,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:25,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:25,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:25,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:25,763 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:25,888 INFO L93 Difference]: Finished difference Result 107 states and 230 transitions. [2019-12-27 19:16:25,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:25,889 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:25,890 INFO L225 Difference]: With dead ends: 107 [2019-12-27 19:16:25,890 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 19:16:25,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:25,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 19:16:25,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2019-12-27 19:16:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:25,893 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:25,894 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:25,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:25,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:25,894 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:25,894 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:26,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:26,098 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1596543068, now seen corresponding path program 16 times [2019-12-27 19:16:26,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:26,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129566637] [2019-12-27 19:16:26,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:26,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129566637] [2019-12-27 19:16:26,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168126967] [2019-12-27 19:16:26,166 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 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 [2019-12-27 19:16:26,208 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:26,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:26,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:26,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:26,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:26,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:26,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [17866242] [2019-12-27 19:16:26,291 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:26,292 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:26,294 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:16:26,294 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:26,296 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:16:26,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:26,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:26,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:26,297 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:26,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:26,415 INFO L93 Difference]: Finished difference Result 106 states and 226 transitions. [2019-12-27 19:16:26,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:26,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:26,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:26,416 INFO L225 Difference]: With dead ends: 106 [2019-12-27 19:16:26,416 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 19:16:26,417 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:26,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 19:16:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2019-12-27 19:16:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:16:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 19:16:26,420 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 19:16:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:26,420 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 19:16:26,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 19:16:26,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:26,421 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:26,421 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:26,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:26,624 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:26,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1596545858, now seen corresponding path program 17 times [2019-12-27 19:16:26,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:26,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137912317] [2019-12-27 19:16:26,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:26,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137912317] [2019-12-27 19:16:26,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326700477] [2019-12-27 19:16:26,714 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 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 [2019-12-27 19:16:26,767 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:26,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:26,768 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:26,769 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:27,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:27,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:27,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [990169845] [2019-12-27 19:16:27,313 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:27,314 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:27,315 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 19:16:27,315 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:27,317 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:27,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:27,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:27,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=93, Unknown=1, NotChecked=0, Total=132 [2019-12-27 19:16:27,318 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 7 states. [2019-12-27 19:16:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:27,447 INFO L93 Difference]: Finished difference Result 111 states and 234 transitions. [2019-12-27 19:16:27,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:27,448 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:27,449 INFO L225 Difference]: With dead ends: 111 [2019-12-27 19:16:27,449 INFO L226 Difference]: Without dead ends: 110 [2019-12-27 19:16:27,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=163, Unknown=1, NotChecked=0, Total=240 [2019-12-27 19:16:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-12-27 19:16:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2019-12-27 19:16:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:27,453 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:27,454 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:27,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:27,454 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:27,455 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:27,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:27,658 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:27,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:27,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1596545951, now seen corresponding path program 18 times [2019-12-27 19:16:27,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:27,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559236363] [2019-12-27 19:16:27,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:27,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559236363] [2019-12-27 19:16:27,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219271352] [2019-12-27 19:16:27,729 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 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 [2019-12-27 19:16:27,772 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:27,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:27,773 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:27,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:27,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:27,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:27,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1895432701] [2019-12-27 19:16:27,847 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:27,848 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:27,849 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 19:16:27,849 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:27,851 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:27,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:27,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:27,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:27,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:27,852 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:27,954 INFO L93 Difference]: Finished difference Result 106 states and 226 transitions. [2019-12-27 19:16:27,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:27,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:27,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:27,955 INFO L225 Difference]: With dead ends: 106 [2019-12-27 19:16:27,955 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 19:16:27,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 19:16:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2019-12-27 19:16:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-27 19:16:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 191 transitions. [2019-12-27 19:16:27,959 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 191 transitions. Word has length 11 [2019-12-27 19:16:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:27,959 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 191 transitions. [2019-12-27 19:16:27,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 191 transitions. [2019-12-27 19:16:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:27,960 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:27,960 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:28,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:28,163 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:28,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1596632348, now seen corresponding path program 19 times [2019-12-27 19:16:28,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:28,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685186689] [2019-12-27 19:16:28,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:28,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685186689] [2019-12-27 19:16:28,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417586764] [2019-12-27 19:16:28,229 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 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 [2019-12-27 19:16:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:28,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:28,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:28,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:28,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:28,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1195429730] [2019-12-27 19:16:28,335 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:28,336 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:28,338 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 19:16:28,338 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:28,339 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:28,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:28,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:28,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:28,339 INFO L87 Difference]: Start difference. First operand 87 states and 191 transitions. Second operand 7 states. [2019-12-27 19:16:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:28,440 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2019-12-27 19:16:28,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:28,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:28,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:28,441 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:28,441 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:28,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2019-12-27 19:16:28,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:28,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:28,446 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:28,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:28,446 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:28,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:28,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:28,447 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:28,447 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:28,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:28,651 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:28,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:28,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1596632441, now seen corresponding path program 20 times [2019-12-27 19:16:28,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:28,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42614313] [2019-12-27 19:16:28,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:28,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42614313] [2019-12-27 19:16:28,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188231538] [2019-12-27 19:16:28,708 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 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 [2019-12-27 19:16:28,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:28,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:28,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:28,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:28,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:28,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:28,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1703534080] [2019-12-27 19:16:28,838 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:28,839 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:28,841 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 19:16:28,841 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:28,842 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:28,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:28,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:28,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:28,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:28,843 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:28,961 INFO L93 Difference]: Finished difference Result 110 states and 233 transitions. [2019-12-27 19:16:28,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:28,961 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:28,963 INFO L225 Difference]: With dead ends: 110 [2019-12-27 19:16:28,963 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 19:16:28,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 19:16:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2019-12-27 19:16:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:16:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 195 transitions. [2019-12-27 19:16:28,968 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 195 transitions. Word has length 11 [2019-12-27 19:16:28,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:28,968 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 195 transitions. [2019-12-27 19:16:28,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 195 transitions. [2019-12-27 19:16:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:28,969 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:28,969 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:29,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:29,172 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1596635231, now seen corresponding path program 21 times [2019-12-27 19:16:29,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:29,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606997169] [2019-12-27 19:16:29,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:29,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606997169] [2019-12-27 19:16:29,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286419492] [2019-12-27 19:16:29,230 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 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 [2019-12-27 19:16:29,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:29,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:29,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 19:16:29,274 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:29,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:29,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:29,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1117535946] [2019-12-27 19:16:29,343 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:29,344 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:29,346 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 19:16:29,346 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:29,347 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:29,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:29,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:29,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:29,348 INFO L87 Difference]: Start difference. First operand 88 states and 195 transitions. Second operand 7 states. [2019-12-27 19:16:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:29,459 INFO L93 Difference]: Finished difference Result 105 states and 222 transitions. [2019-12-27 19:16:29,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:29,459 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:29,460 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:29,460 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:29,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2019-12-27 19:16:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-27 19:16:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 199 transitions. [2019-12-27 19:16:29,464 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 199 transitions. Word has length 11 [2019-12-27 19:16:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:29,464 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 199 transitions. [2019-12-27 19:16:29,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 199 transitions. [2019-12-27 19:16:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:29,465 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:29,465 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:29,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:29,666 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:29,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1596635324, now seen corresponding path program 22 times [2019-12-27 19:16:29,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:29,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356157580] [2019-12-27 19:16:29,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:29,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356157580] [2019-12-27 19:16:29,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367153299] [2019-12-27 19:16:29,726 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 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 [2019-12-27 19:16:29,770 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:29,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:29,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:16:29,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:29,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:29,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 19:16:29,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [980086099] [2019-12-27 19:16:29,841 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:29,842 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:29,843 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 19:16:29,844 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:29,844 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:29,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:16:29,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:29,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:16:29,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:16:29,845 INFO L87 Difference]: Start difference. First operand 89 states and 199 transitions. Second operand 7 states. [2019-12-27 19:16:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:29,943 INFO L93 Difference]: Finished difference Result 103 states and 217 transitions. [2019-12-27 19:16:29,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:16:29,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:16:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:29,945 INFO L225 Difference]: With dead ends: 103 [2019-12-27 19:16:29,945 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 19:16:29,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:29,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 19:16:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2019-12-27 19:16:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:16:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 192 transitions. [2019-12-27 19:16:29,950 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 192 transitions. Word has length 11 [2019-12-27 19:16:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:29,950 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 192 transitions. [2019-12-27 19:16:29,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:16:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 192 transitions. [2019-12-27 19:16:29,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:16:29,950 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:29,951 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:30,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:30,154 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1204865443, now seen corresponding path program 5 times [2019-12-27 19:16:30,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:30,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176015979] [2019-12-27 19:16:30,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:30,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176015979] [2019-12-27 19:16:30,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614529600] [2019-12-27 19:16:30,213 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 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 [2019-12-27 19:16:30,254 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:30,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:30,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:30,255 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:30,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:30,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:30,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [641854583] [2019-12-27 19:16:30,338 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:30,339 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:30,340 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 11 transitions. [2019-12-27 19:16:30,340 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:30,340 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:30,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:30,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:30,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:30,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:30,341 INFO L87 Difference]: Start difference. First operand 88 states and 192 transitions. Second operand 8 states. [2019-12-27 19:16:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:30,479 INFO L93 Difference]: Finished difference Result 105 states and 224 transitions. [2019-12-27 19:16:30,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:30,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 19:16:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:30,481 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:16:30,481 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:16:30,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:16:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2019-12-27 19:16:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 19:16:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 19:16:30,486 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 19:16:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:30,486 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 19:16:30,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 19:16:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:30,487 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:30,487 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:30,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:30,688 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1505453604, now seen corresponding path program 6 times [2019-12-27 19:16:30,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:30,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051976465] [2019-12-27 19:16:30,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:30,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051976465] [2019-12-27 19:16:30,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130030766] [2019-12-27 19:16:30,779 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 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 [2019-12-27 19:16:30,828 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:16:30,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:30,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:30,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:30,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:30,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:16:30,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [240214157] [2019-12-27 19:16:30,946 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:30,947 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:30,949 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 40 transitions. [2019-12-27 19:16:30,949 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:30,950 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:30,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:30,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:30,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:30,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:30,951 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 9 states. [2019-12-27 19:16:31,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:31,146 INFO L93 Difference]: Finished difference Result 116 states and 244 transitions. [2019-12-27 19:16:31,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:31,147 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 19:16:31,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:31,148 INFO L225 Difference]: With dead ends: 116 [2019-12-27 19:16:31,148 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 19:16:31,149 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:16:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 19:16:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2019-12-27 19:16:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:31,153 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:31,154 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:31,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:31,154 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:31,155 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:31,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:31,358 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:31,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1531442826, now seen corresponding path program 23 times [2019-12-27 19:16:31,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:31,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219282815] [2019-12-27 19:16:31,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:31,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219282815] [2019-12-27 19:16:31,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997921944] [2019-12-27 19:16:31,431 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 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 [2019-12-27 19:16:31,476 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:31,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:31,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:31,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:31,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:31,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:31,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1579531871] [2019-12-27 19:16:31,560 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:31,562 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:31,564 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 42 transitions. [2019-12-27 19:16:31,564 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:31,564 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:31,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:31,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:31,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:31,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:31,565 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:31,707 INFO L93 Difference]: Finished difference Result 120 states and 257 transitions. [2019-12-27 19:16:31,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:31,708 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:31,708 INFO L225 Difference]: With dead ends: 120 [2019-12-27 19:16:31,709 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 19:16:31,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 19:16:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2019-12-27 19:16:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:31,714 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:31,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:31,714 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:31,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:31,715 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:31,715 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:31,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:31,918 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035827, now seen corresponding path program 24 times [2019-12-27 19:16:31,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:31,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832280651] [2019-12-27 19:16:31,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:31,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832280651] [2019-12-27 19:16:31,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356500300] [2019-12-27 19:16:31,984 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 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 [2019-12-27 19:16:32,029 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:32,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:32,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:32,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:32,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:32,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:32,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [894751067] [2019-12-27 19:16:32,118 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:32,119 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:32,121 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 19:16:32,122 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:32,122 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:32,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:32,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:32,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:32,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:32,123 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:32,281 INFO L93 Difference]: Finished difference Result 125 states and 268 transitions. [2019-12-27 19:16:32,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:32,281 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:32,282 INFO L225 Difference]: With dead ends: 125 [2019-12-27 19:16:32,282 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 19:16:32,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 19:16:32,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2019-12-27 19:16:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:32,306 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:32,307 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:32,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:32,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:32,308 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:32,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:32,510 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:32,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:32,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1983035920, now seen corresponding path program 25 times [2019-12-27 19:16:32,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:32,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948947628] [2019-12-27 19:16:32,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:32,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948947628] [2019-12-27 19:16:32,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016333303] [2019-12-27 19:16:32,580 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 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 [2019-12-27 19:16:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:32,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:32,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:33,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:33,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:33,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [529426247] [2019-12-27 19:16:33,378 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:33,379 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:33,381 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 19:16:33,381 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:33,382 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:33,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:33,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:33,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:33,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=132, Unknown=1, NotChecked=0, Total=182 [2019-12-27 19:16:33,382 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:33,932 INFO L93 Difference]: Finished difference Result 125 states and 268 transitions. [2019-12-27 19:16:33,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:33,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:33,934 INFO L225 Difference]: With dead ends: 125 [2019-12-27 19:16:33,934 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 19:16:33,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=104, Invalid=236, Unknown=2, NotChecked=0, Total=342 [2019-12-27 19:16:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 19:16:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2019-12-27 19:16:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:33,939 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:33,939 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:33,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:33,940 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:33,940 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:34,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:34,143 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:34,144 INFO L82 PathProgramCache]: Analyzing trace with hash -737275626, now seen corresponding path program 26 times [2019-12-27 19:16:34,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:34,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714893031] [2019-12-27 19:16:34,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:34,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714893031] [2019-12-27 19:16:34,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440935340] [2019-12-27 19:16:34,205 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 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 [2019-12-27 19:16:34,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:34,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:34,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:34,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:34,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:34,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:34,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [944005186] [2019-12-27 19:16:34,343 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:34,345 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:34,347 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 19:16:34,347 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:34,347 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:34,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:34,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:34,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:34,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:34,348 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:34,485 INFO L93 Difference]: Finished difference Result 126 states and 269 transitions. [2019-12-27 19:16:34,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:34,486 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:34,487 INFO L225 Difference]: With dead ends: 126 [2019-12-27 19:16:34,487 INFO L226 Difference]: Without dead ends: 125 [2019-12-27 19:16:34,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-27 19:16:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2019-12-27 19:16:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:34,492 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:34,492 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:34,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:34,493 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:34,493 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:34,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:34,696 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash -737275533, now seen corresponding path program 27 times [2019-12-27 19:16:34,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:34,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777850815] [2019-12-27 19:16:34,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:34,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777850815] [2019-12-27 19:16:34,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828903414] [2019-12-27 19:16:34,772 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 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 [2019-12-27 19:16:34,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:34,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:34,819 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:34,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:35,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:35,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:35,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [949881125] [2019-12-27 19:16:35,008 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:35,010 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:35,013 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 19:16:35,013 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:35,013 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:35,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:35,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:35,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:35,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:35,016 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:35,257 INFO L93 Difference]: Finished difference Result 127 states and 273 transitions. [2019-12-27 19:16:35,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:35,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:35,259 INFO L225 Difference]: With dead ends: 127 [2019-12-27 19:16:35,259 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 19:16:35,260 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:35,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 19:16:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2019-12-27 19:16:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 19:16:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 226 transitions. [2019-12-27 19:16:35,265 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 226 transitions. Word has length 12 [2019-12-27 19:16:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:35,265 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 226 transitions. [2019-12-27 19:16:35,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 226 transitions. [2019-12-27 19:16:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:35,266 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:35,267 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:35,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:35,471 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash -737272743, now seen corresponding path program 28 times [2019-12-27 19:16:35,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:35,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123443159] [2019-12-27 19:16:35,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:35,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123443159] [2019-12-27 19:16:35,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341806478] [2019-12-27 19:16:35,551 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 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 [2019-12-27 19:16:35,621 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:35,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:35,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:35,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:35,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:35,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:35,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [10567757] [2019-12-27 19:16:35,761 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:35,762 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:35,764 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 19:16:35,764 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:35,764 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:35,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:35,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:35,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:35,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:35,765 INFO L87 Difference]: Start difference. First operand 99 states and 226 transitions. Second operand 8 states. [2019-12-27 19:16:35,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:35,952 INFO L93 Difference]: Finished difference Result 129 states and 275 transitions. [2019-12-27 19:16:35,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:35,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:35,955 INFO L225 Difference]: With dead ends: 129 [2019-12-27 19:16:35,955 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 19:16:35,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 19:16:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2019-12-27 19:16:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 19:16:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 226 transitions. [2019-12-27 19:16:35,959 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 226 transitions. Word has length 12 [2019-12-27 19:16:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:35,960 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 226 transitions. [2019-12-27 19:16:35,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 226 transitions. [2019-12-27 19:16:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:35,960 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:35,960 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:36,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:36,161 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash -737272650, now seen corresponding path program 29 times [2019-12-27 19:16:36,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:36,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938518859] [2019-12-27 19:16:36,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:36,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938518859] [2019-12-27 19:16:36,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184808588] [2019-12-27 19:16:36,234 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 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 [2019-12-27 19:16:36,292 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:36,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:36,293 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:36,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:36,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:36,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:36,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1602882467] [2019-12-27 19:16:36,512 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:36,513 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:36,515 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 19:16:36,515 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:36,516 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:36,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:36,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:36,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:36,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:36,518 INFO L87 Difference]: Start difference. First operand 99 states and 226 transitions. Second operand 8 states. [2019-12-27 19:16:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:36,710 INFO L93 Difference]: Finished difference Result 127 states and 273 transitions. [2019-12-27 19:16:36,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:36,711 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:36,712 INFO L225 Difference]: With dead ends: 127 [2019-12-27 19:16:36,712 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 19:16:36,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 19:16:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2019-12-27 19:16:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:16:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 222 transitions. [2019-12-27 19:16:36,715 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 222 transitions. Word has length 12 [2019-12-27 19:16:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:36,716 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 222 transitions. [2019-12-27 19:16:36,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 222 transitions. [2019-12-27 19:16:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:36,716 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:36,717 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:36,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:36,917 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:36,917 INFO L82 PathProgramCache]: Analyzing trace with hash 832415251, now seen corresponding path program 30 times [2019-12-27 19:16:36,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:36,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937065735] [2019-12-27 19:16:36,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:36,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937065735] [2019-12-27 19:16:36,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650123685] [2019-12-27 19:16:36,977 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 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 [2019-12-27 19:16:37,020 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:16:37,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:37,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:37,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:37,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:37,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:37,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2051728589] [2019-12-27 19:16:37,109 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:37,110 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:37,111 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:37,111 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:37,111 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:37,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:37,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:37,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:37,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:37,112 INFO L87 Difference]: Start difference. First operand 98 states and 222 transitions. Second operand 8 states. [2019-12-27 19:16:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:37,244 INFO L93 Difference]: Finished difference Result 123 states and 260 transitions. [2019-12-27 19:16:37,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:37,244 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:37,245 INFO L225 Difference]: With dead ends: 123 [2019-12-27 19:16:37,245 INFO L226 Difference]: Without dead ends: 122 [2019-12-27 19:16:37,245 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-12-27 19:16:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2019-12-27 19:16:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:16:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 19:16:37,248 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 19:16:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:37,248 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 19:16:37,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 19:16:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:37,249 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:37,250 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:37,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:37,454 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:37,454 INFO L82 PathProgramCache]: Analyzing trace with hash 832415344, now seen corresponding path program 31 times [2019-12-27 19:16:37,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:37,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687540895] [2019-12-27 19:16:37,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:37,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687540895] [2019-12-27 19:16:37,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045816166] [2019-12-27 19:16:37,562 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 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 [2019-12-27 19:16:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:37,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:37,623 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:37,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:37,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:37,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1202260171] [2019-12-27 19:16:37,784 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:37,786 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:37,789 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:37,789 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:37,790 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:37,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:37,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:37,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:37,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:37,792 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 19:16:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:38,011 INFO L93 Difference]: Finished difference Result 129 states and 275 transitions. [2019-12-27 19:16:38,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:38,011 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:38,012 INFO L225 Difference]: With dead ends: 129 [2019-12-27 19:16:38,012 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 19:16:38,013 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 19:16:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 103. [2019-12-27 19:16:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:16:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 19:16:38,017 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 19:16:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:38,017 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 19:16:38,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 19:16:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:38,018 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:38,018 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:38,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:38,221 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash 832418134, now seen corresponding path program 32 times [2019-12-27 19:16:38,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:38,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037270872] [2019-12-27 19:16:38,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:38,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037270872] [2019-12-27 19:16:38,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725251293] [2019-12-27 19:16:38,301 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:38,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:38,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:38,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:38,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:38,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:38,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:38,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [491774783] [2019-12-27 19:16:38,449 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:38,450 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:38,452 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:38,452 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:38,453 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:38,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:38,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:38,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:38,455 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 19:16:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:38,681 INFO L93 Difference]: Finished difference Result 131 states and 280 transitions. [2019-12-27 19:16:38,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:38,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:38,683 INFO L225 Difference]: With dead ends: 131 [2019-12-27 19:16:38,683 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 19:16:38,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:16:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 19:16:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2019-12-27 19:16:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:16:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 19:16:38,688 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 19:16:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:38,689 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 19:16:38,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 19:16:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:38,689 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:38,689 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:38,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:38,893 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:38,893 INFO L82 PathProgramCache]: Analyzing trace with hash 832418227, now seen corresponding path program 33 times [2019-12-27 19:16:38,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:38,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156836943] [2019-12-27 19:16:38,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:38,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156836943] [2019-12-27 19:16:38,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705097413] [2019-12-27 19:16:38,960 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:39,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:39,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:39,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:39,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:39,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:39,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:39,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1585549115] [2019-12-27 19:16:39,126 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:39,127 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:39,128 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:39,129 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:39,129 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:39,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:39,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:39,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:39,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:39,131 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 19:16:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:39,331 INFO L93 Difference]: Finished difference Result 130 states and 279 transitions. [2019-12-27 19:16:39,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:39,332 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:39,334 INFO L225 Difference]: With dead ends: 130 [2019-12-27 19:16:39,334 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 19:16:39,334 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 19:16:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2019-12-27 19:16:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:39,339 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:39,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:39,339 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:39,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:39,341 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:39,341 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:39,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:39,545 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash 832504624, now seen corresponding path program 34 times [2019-12-27 19:16:39,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:39,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919560071] [2019-12-27 19:16:39,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:39,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919560071] [2019-12-27 19:16:39,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925679758] [2019-12-27 19:16:39,618 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:39,661 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:39,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:39,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:39,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:39,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:39,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:39,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [393550406] [2019-12-27 19:16:39,750 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:39,751 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:39,753 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:39,753 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:39,754 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:39,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:39,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:39,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:39,755 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:39,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:39,928 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2019-12-27 19:16:39,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:39,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:39,929 INFO L225 Difference]: With dead ends: 133 [2019-12-27 19:16:39,929 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 19:16:39,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 19:16:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2019-12-27 19:16:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:39,934 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:39,934 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:39,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:39,935 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:39,935 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:40,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:40,138 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:40,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:40,139 INFO L82 PathProgramCache]: Analyzing trace with hash 832504717, now seen corresponding path program 35 times [2019-12-27 19:16:40,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:40,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093590318] [2019-12-27 19:16:40,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:40,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093590318] [2019-12-27 19:16:40,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663223708] [2019-12-27 19:16:40,218 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:40,265 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:40,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:40,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:40,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:40,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:40,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:40,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [16493276] [2019-12-27 19:16:40,354 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:40,355 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:40,356 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:40,357 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:40,357 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:40,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:40,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:40,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:40,358 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:40,566 INFO L93 Difference]: Finished difference Result 130 states and 282 transitions. [2019-12-27 19:16:40,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:40,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:40,567 INFO L225 Difference]: With dead ends: 130 [2019-12-27 19:16:40,567 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 19:16:40,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 19:16:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2019-12-27 19:16:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:16:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 19:16:40,571 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 19:16:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:40,571 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 19:16:40,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 19:16:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:40,572 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:40,572 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:40,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:40,776 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:40,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:40,777 INFO L82 PathProgramCache]: Analyzing trace with hash 832507507, now seen corresponding path program 36 times [2019-12-27 19:16:40,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:40,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243027863] [2019-12-27 19:16:40,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:40,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243027863] [2019-12-27 19:16:40,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631416160] [2019-12-27 19:16:40,847 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:40,894 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:40,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:40,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:40,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:40,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:40,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:40,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1882423505] [2019-12-27 19:16:40,989 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:40,990 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:40,991 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:40,992 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:40,992 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:40,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:40,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:40,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:40,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:40,993 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 19:16:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:41,146 INFO L93 Difference]: Finished difference Result 130 states and 279 transitions. [2019-12-27 19:16:41,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:41,146 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:41,147 INFO L225 Difference]: With dead ends: 130 [2019-12-27 19:16:41,147 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 19:16:41,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 19:16:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2019-12-27 19:16:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 19:16:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2019-12-27 19:16:41,149 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 12 [2019-12-27 19:16:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:41,150 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2019-12-27 19:16:41,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2019-12-27 19:16:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:41,150 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:41,151 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:41,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:41,353 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash 832507600, now seen corresponding path program 37 times [2019-12-27 19:16:41,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:41,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444909416] [2019-12-27 19:16:41,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:41,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444909416] [2019-12-27 19:16:41,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418501143] [2019-12-27 19:16:41,409 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:41,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:41,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:41,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:41,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:41,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1739354247] [2019-12-27 19:16:41,528 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:41,529 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:41,531 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:41,531 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:41,531 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:41,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:41,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:41,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:41,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:41,532 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand 8 states. [2019-12-27 19:16:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:41,671 INFO L93 Difference]: Finished difference Result 127 states and 273 transitions. [2019-12-27 19:16:41,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:41,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:41,673 INFO L225 Difference]: With dead ends: 127 [2019-12-27 19:16:41,673 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 19:16:41,673 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 19:16:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2019-12-27 19:16:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:41,678 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:41,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:41,678 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:41,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:41,679 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:41,679 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:41,881 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:41,882 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2046775021, now seen corresponding path program 38 times [2019-12-27 19:16:41,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:41,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390013533] [2019-12-27 19:16:41,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:41,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390013533] [2019-12-27 19:16:41,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926968385] [2019-12-27 19:16:41,971 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:42,032 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:42,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:42,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:42,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:42,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:42,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:42,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1759280288] [2019-12-27 19:16:42,138 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:42,139 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:42,142 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 19:16:42,142 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:42,144 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:16:42,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:42,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:42,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:42,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:42,145 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:42,286 INFO L93 Difference]: Finished difference Result 124 states and 264 transitions. [2019-12-27 19:16:42,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:42,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:42,288 INFO L225 Difference]: With dead ends: 124 [2019-12-27 19:16:42,288 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 19:16:42,289 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 19:16:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101. [2019-12-27 19:16:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:16:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 19:16:42,293 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 19:16:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:42,293 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 19:16:42,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 19:16:42,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:42,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:42,294 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:42,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:42,497 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:42,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2046772231, now seen corresponding path program 39 times [2019-12-27 19:16:42,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:42,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951998140] [2019-12-27 19:16:42,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:42,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951998140] [2019-12-27 19:16:42,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748798352] [2019-12-27 19:16:42,556 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:42,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:42,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:42,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:42,610 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:43,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:43,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:43,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1248682931] [2019-12-27 19:16:43,120 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:43,122 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:43,123 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:43,123 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:43,124 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:16:43,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:43,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:43,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:43,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=133, Unknown=1, NotChecked=0, Total=182 [2019-12-27 19:16:43,125 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 19:16:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:43,306 INFO L93 Difference]: Finished difference Result 129 states and 272 transitions. [2019-12-27 19:16:43,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:43,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:43,308 INFO L225 Difference]: With dead ends: 129 [2019-12-27 19:16:43,308 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 19:16:43,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=238, Unknown=1, NotChecked=0, Total=342 [2019-12-27 19:16:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 19:16:43,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2019-12-27 19:16:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:43,312 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:43,312 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:43,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:43,313 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:43,313 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:43,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:43,514 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:43,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2046772138, now seen corresponding path program 40 times [2019-12-27 19:16:43,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:43,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034526206] [2019-12-27 19:16:43,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:43,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034526206] [2019-12-27 19:16:43,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991324132] [2019-12-27 19:16:43,580 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:43,619 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:43,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:43,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:43,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:43,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:43,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:43,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [865575901] [2019-12-27 19:16:43,705 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:43,705 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:43,707 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:16:43,707 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:43,708 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:16:43,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:43,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:43,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:43,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:43,709 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:43,855 INFO L93 Difference]: Finished difference Result 127 states and 270 transitions. [2019-12-27 19:16:43,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:43,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:43,857 INFO L225 Difference]: With dead ends: 127 [2019-12-27 19:16:43,857 INFO L226 Difference]: Without dead ends: 126 [2019-12-27 19:16:43,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-27 19:16:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2019-12-27 19:16:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 19:16:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2019-12-27 19:16:43,861 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 12 [2019-12-27 19:16:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:43,861 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2019-12-27 19:16:43,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2019-12-27 19:16:43,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:43,862 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:43,862 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:44,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:44,066 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2046685741, now seen corresponding path program 41 times [2019-12-27 19:16:44,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:44,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412879541] [2019-12-27 19:16:44,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:44,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412879541] [2019-12-27 19:16:44,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601749044] [2019-12-27 19:16:44,125 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:44,173 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:44,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:44,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:44,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:44,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:44,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:44,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1052516449] [2019-12-27 19:16:44,321 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:44,322 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:44,323 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 19:16:44,323 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:44,324 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:44,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:44,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:44,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:44,325 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand 8 states. [2019-12-27 19:16:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:44,511 INFO L93 Difference]: Finished difference Result 135 states and 284 transitions. [2019-12-27 19:16:44,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:44,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:44,513 INFO L225 Difference]: With dead ends: 135 [2019-12-27 19:16:44,514 INFO L226 Difference]: Without dead ends: 134 [2019-12-27 19:16:44,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-27 19:16:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 102. [2019-12-27 19:16:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:44,517 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:44,518 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:44,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:44,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:44,518 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:44,519 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:44,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:44,722 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:44,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2046685648, now seen corresponding path program 42 times [2019-12-27 19:16:44,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:44,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609218229] [2019-12-27 19:16:44,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:44,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609218229] [2019-12-27 19:16:44,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299534309] [2019-12-27 19:16:44,792 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:44,832 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:44,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:44,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:44,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:44,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:44,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:44,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2120108999] [2019-12-27 19:16:44,974 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:44,976 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:44,977 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 19:16:44,977 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:44,978 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:44,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:44,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:44,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:44,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:44,978 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:45,165 INFO L93 Difference]: Finished difference Result 130 states and 276 transitions. [2019-12-27 19:16:45,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:45,166 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:45,166 INFO L225 Difference]: With dead ends: 130 [2019-12-27 19:16:45,166 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 19:16:45,167 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 19:16:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2019-12-27 19:16:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:16:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 19:16:45,170 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 19:16:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:45,170 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 19:16:45,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 19:16:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:45,171 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:45,171 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:45,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:45,374 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:45,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:45,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2046682858, now seen corresponding path program 43 times [2019-12-27 19:16:45,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:45,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065584302] [2019-12-27 19:16:45,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:45,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065584302] [2019-12-27 19:16:45,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465095029] [2019-12-27 19:16:45,441 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:45,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:45,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:45,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:45,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:45,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [142452579] [2019-12-27 19:16:45,637 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:45,638 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:45,640 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 19:16:45,640 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:45,641 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:45,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:45,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:45,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:45,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:45,642 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 19:16:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:45,803 INFO L93 Difference]: Finished difference Result 131 states and 277 transitions. [2019-12-27 19:16:45,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:45,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:45,810 INFO L225 Difference]: With dead ends: 131 [2019-12-27 19:16:45,810 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 19:16:45,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 19:16:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2019-12-27 19:16:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:45,813 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:45,813 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:45,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:45,814 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:45,814 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:46,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:46,017 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2046682765, now seen corresponding path program 44 times [2019-12-27 19:16:46,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:46,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233477705] [2019-12-27 19:16:46,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:46,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233477705] [2019-12-27 19:16:46,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676243400] [2019-12-27 19:16:46,085 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:46,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:46,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:46,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:46,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:46,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:46,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:46,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1490829581] [2019-12-27 19:16:46,202 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:46,203 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:46,205 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 19:16:46,206 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:46,206 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:16:46,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:46,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:46,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:46,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:46,207 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:46,350 INFO L93 Difference]: Finished difference Result 125 states and 265 transitions. [2019-12-27 19:16:46,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:46,350 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:46,351 INFO L225 Difference]: With dead ends: 125 [2019-12-27 19:16:46,351 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 19:16:46,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 19:16:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2019-12-27 19:16:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 19:16:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 217 transitions. [2019-12-27 19:16:46,354 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 217 transitions. Word has length 12 [2019-12-27 19:16:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:46,355 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 217 transitions. [2019-12-27 19:16:46,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 217 transitions. [2019-12-27 19:16:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:46,355 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:46,355 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:46,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:46,556 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:46,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:46,556 INFO L82 PathProgramCache]: Analyzing trace with hash -2044004551, now seen corresponding path program 45 times [2019-12-27 19:16:46,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:46,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455504344] [2019-12-27 19:16:46,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:46,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455504344] [2019-12-27 19:16:46,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985842143] [2019-12-27 19:16:46,621 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:46,664 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:46,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:46,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:46,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:46,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:46,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:46,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1222039017] [2019-12-27 19:16:46,789 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:46,790 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:46,792 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:46,792 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:46,795 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:46,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:46,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:46,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:46,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:46,795 INFO L87 Difference]: Start difference. First operand 99 states and 217 transitions. Second operand 8 states. [2019-12-27 19:16:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:46,926 INFO L93 Difference]: Finished difference Result 123 states and 260 transitions. [2019-12-27 19:16:46,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:46,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:46,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:46,927 INFO L225 Difference]: With dead ends: 123 [2019-12-27 19:16:46,927 INFO L226 Difference]: Without dead ends: 122 [2019-12-27 19:16:46,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:46,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-12-27 19:16:46,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2019-12-27 19:16:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:46,930 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:46,931 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:46,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:46,931 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:46,932 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:47,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:47,136 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2044004458, now seen corresponding path program 46 times [2019-12-27 19:16:47,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:47,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890612391] [2019-12-27 19:16:47,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:47,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890612391] [2019-12-27 19:16:47,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746332712] [2019-12-27 19:16:47,196 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:47,239 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:47,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:47,240 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:47,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:47,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:47,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:47,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1466555412] [2019-12-27 19:16:47,317 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:47,317 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:47,319 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:47,319 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:47,320 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:47,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:47,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:47,321 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:47,494 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2019-12-27 19:16:47,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:47,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:47,495 INFO L225 Difference]: With dead ends: 132 [2019-12-27 19:16:47,495 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 19:16:47,495 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 19:16:47,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2019-12-27 19:16:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:16:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 19:16:47,497 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 19:16:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:47,497 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 19:16:47,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:47,498 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 19:16:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:47,498 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:47,498 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:47,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:47,699 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:47,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2044001668, now seen corresponding path program 47 times [2019-12-27 19:16:47,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:47,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684335590] [2019-12-27 19:16:47,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:47,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684335590] [2019-12-27 19:16:47,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315023527] [2019-12-27 19:16:47,759 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:47,804 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:47,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:47,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:47,806 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:47,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:47,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:47,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1400336865] [2019-12-27 19:16:47,885 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:47,885 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:47,887 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:47,887 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:47,895 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:47,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:47,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:47,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:47,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:47,895 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 19:16:48,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:48,062 INFO L93 Difference]: Finished difference Result 129 states and 272 transitions. [2019-12-27 19:16:48,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:48,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:48,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:48,064 INFO L225 Difference]: With dead ends: 129 [2019-12-27 19:16:48,064 INFO L226 Difference]: Without dead ends: 128 [2019-12-27 19:16:48,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-12-27 19:16:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2019-12-27 19:16:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:48,068 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:48,068 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:48,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:48,069 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:48,069 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:48,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:48,272 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:48,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2044001575, now seen corresponding path program 48 times [2019-12-27 19:16:48,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:48,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124368591] [2019-12-27 19:16:48,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:48,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124368591] [2019-12-27 19:16:48,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181613435] [2019-12-27 19:16:48,336 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:48,379 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:16:48,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:48,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:48,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:48,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:48,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:48,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1102252213] [2019-12-27 19:16:48,450 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:48,451 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:48,453 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:48,453 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:48,454 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:48,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:48,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:48,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:48,455 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:48,606 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2019-12-27 19:16:48,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:48,606 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:48,608 INFO L225 Difference]: With dead ends: 132 [2019-12-27 19:16:48,608 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 19:16:48,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 19:16:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 100. [2019-12-27 19:16:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 19:16:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2019-12-27 19:16:48,612 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 12 [2019-12-27 19:16:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:48,612 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2019-12-27 19:16:48,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2019-12-27 19:16:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:48,613 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:48,613 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:48,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:48,816 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2043915178, now seen corresponding path program 49 times [2019-12-27 19:16:48,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:48,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776197384] [2019-12-27 19:16:48,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:48,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776197384] [2019-12-27 19:16:48,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092115645] [2019-12-27 19:16:48,876 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:48,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:48,919 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:49,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:49,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:49,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1440493786] [2019-12-27 19:16:49,015 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:49,016 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:49,017 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:49,017 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:49,018 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:49,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:49,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:49,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:49,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:49,018 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand 8 states. [2019-12-27 19:16:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:49,156 INFO L93 Difference]: Finished difference Result 126 states and 266 transitions. [2019-12-27 19:16:49,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:49,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:49,158 INFO L225 Difference]: With dead ends: 126 [2019-12-27 19:16:49,158 INFO L226 Difference]: Without dead ends: 125 [2019-12-27 19:16:49,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-12-27 19:16:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2019-12-27 19:16:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:49,161 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:49,162 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:49,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:49,162 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:49,162 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:49,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:49,365 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:49,366 INFO L82 PathProgramCache]: Analyzing trace with hash -2043915085, now seen corresponding path program 50 times [2019-12-27 19:16:49,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:49,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544852898] [2019-12-27 19:16:49,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:49,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544852898] [2019-12-27 19:16:49,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961084374] [2019-12-27 19:16:49,431 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:49,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:49,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:49,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:49,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:49,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:49,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:49,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2028451915] [2019-12-27 19:16:49,574 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:49,575 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:49,576 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:49,577 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:49,577 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:49,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:49,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:49,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:49,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:49,578 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:50,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:50,435 INFO L93 Difference]: Finished difference Result 132 states and 278 transitions. [2019-12-27 19:16:50,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:50,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:50,436 INFO L225 Difference]: With dead ends: 132 [2019-12-27 19:16:50,437 INFO L226 Difference]: Without dead ends: 131 [2019-12-27 19:16:50,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=268, Unknown=1, NotChecked=0, Total=380 [2019-12-27 19:16:50,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-12-27 19:16:50,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2019-12-27 19:16:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 19:16:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 225 transitions. [2019-12-27 19:16:50,440 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 225 transitions. Word has length 12 [2019-12-27 19:16:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:50,441 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 225 transitions. [2019-12-27 19:16:50,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 225 transitions. [2019-12-27 19:16:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:50,441 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:50,441 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:50,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:50,645 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2043912295, now seen corresponding path program 51 times [2019-12-27 19:16:50,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:50,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301299819] [2019-12-27 19:16:50,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:50,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301299819] [2019-12-27 19:16:50,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228951566] [2019-12-27 19:16:50,703 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:50,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:50,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:50,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 19:16:50,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:50,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:50,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:50,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [456498831] [2019-12-27 19:16:50,838 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:50,839 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:50,841 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:50,841 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:50,841 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:50,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:50,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:50,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:50,842 INFO L87 Difference]: Start difference. First operand 101 states and 225 transitions. Second operand 8 states. [2019-12-27 19:16:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:50,999 INFO L93 Difference]: Finished difference Result 124 states and 261 transitions. [2019-12-27 19:16:50,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:51,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:51,001 INFO L225 Difference]: With dead ends: 124 [2019-12-27 19:16:51,001 INFO L226 Difference]: Without dead ends: 123 [2019-12-27 19:16:51,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-27 19:16:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 102. [2019-12-27 19:16:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:16:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 229 transitions. [2019-12-27 19:16:51,005 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 229 transitions. Word has length 12 [2019-12-27 19:16:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:51,005 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 229 transitions. [2019-12-27 19:16:51,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 229 transitions. [2019-12-27 19:16:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:51,006 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:51,006 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:51,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:51,207 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2043912202, now seen corresponding path program 52 times [2019-12-27 19:16:51,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:51,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326860217] [2019-12-27 19:16:51,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:51,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326860217] [2019-12-27 19:16:51,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961846445] [2019-12-27 19:16:51,268 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:51,308 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:51,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:51,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:16:51,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:51,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:51,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 19:16:51,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1829724207] [2019-12-27 19:16:51,389 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:51,390 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:51,392 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:16:51,392 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:51,393 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:16:51,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:16:51,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:51,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:16:51,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:16:51,393 INFO L87 Difference]: Start difference. First operand 102 states and 229 transitions. Second operand 8 states. [2019-12-27 19:16:51,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:51,521 INFO L93 Difference]: Finished difference Result 120 states and 251 transitions. [2019-12-27 19:16:51,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:16:51,521 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:16:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:51,523 INFO L225 Difference]: With dead ends: 120 [2019-12-27 19:16:51,523 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 19:16:51,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:16:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 19:16:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2019-12-27 19:16:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 19:16:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2019-12-27 19:16:51,526 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 12 [2019-12-27 19:16:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:51,526 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2019-12-27 19:16:51,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:16:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2019-12-27 19:16:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:16:51,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:51,527 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:51,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:51,730 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:51,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1303876718, now seen corresponding path program 6 times [2019-12-27 19:16:51,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:51,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861594754] [2019-12-27 19:16:51,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:51,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861594754] [2019-12-27 19:16:51,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977396683] [2019-12-27 19:16:51,817 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:51,886 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:16:51,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:51,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:51,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:52,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:52,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:16:52,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1929623400] [2019-12-27 19:16:52,023 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:52,024 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:52,025 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 12 transitions. [2019-12-27 19:16:52,025 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:52,026 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:52,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:52,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:52,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:52,027 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand 9 states. [2019-12-27 19:16:52,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:52,183 INFO L93 Difference]: Finished difference Result 120 states and 256 transitions. [2019-12-27 19:16:52,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:52,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 19:16:52,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:52,185 INFO L225 Difference]: With dead ends: 120 [2019-12-27 19:16:52,185 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 19:16:52,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:16:52,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 19:16:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2019-12-27 19:16:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 19:16:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-27 19:16:52,189 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-27 19:16:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:52,189 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-27 19:16:52,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-27 19:16:52,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:52,190 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:52,190 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:52,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:52,394 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:52,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:52,394 INFO L82 PathProgramCache]: Analyzing trace with hash 576390728, now seen corresponding path program 7 times [2019-12-27 19:16:52,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:52,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580533569] [2019-12-27 19:16:52,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:52,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580533569] [2019-12-27 19:16:52,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275557187] [2019-12-27 19:16:52,474 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:52,521 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:16:52,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:52,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:52,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:16:52,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [879543269] [2019-12-27 19:16:52,647 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:52,648 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:52,650 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 45 transitions. [2019-12-27 19:16:52,650 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:52,651 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:52,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:16:52,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:52,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:16:52,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:16:52,651 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 10 states. [2019-12-27 19:16:52,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:52,841 INFO L93 Difference]: Finished difference Result 131 states and 276 transitions. [2019-12-27 19:16:52,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:16:52,841 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-27 19:16:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:52,842 INFO L225 Difference]: With dead ends: 131 [2019-12-27 19:16:52,843 INFO L226 Difference]: Without dead ends: 130 [2019-12-27 19:16:52,843 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:16:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-27 19:16:52,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2019-12-27 19:16:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:16:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:16:52,846 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:16:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:52,846 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:16:52,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:16:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:16:52,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:52,847 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:52,847 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:53,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:53,048 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:53,048 INFO L82 PathProgramCache]: Analyzing trace with hash 550401506, now seen corresponding path program 53 times [2019-12-27 19:16:53,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:53,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428086710] [2019-12-27 19:16:53,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:53,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428086710] [2019-12-27 19:16:53,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790498722] [2019-12-27 19:16:53,131 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:53,174 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:53,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:53,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:53,176 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:53,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:53,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:16:53,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1030344175] [2019-12-27 19:16:53,286 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:53,287 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:53,289 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 49 transitions. [2019-12-27 19:16:53,290 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:53,290 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:53,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:53,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:53,290 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:16:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:53,487 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2019-12-27 19:16:53,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:53,487 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:16:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:53,489 INFO L225 Difference]: With dead ends: 138 [2019-12-27 19:16:53,489 INFO L226 Difference]: Without dead ends: 137 [2019-12-27 19:16:53,489 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:16:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-27 19:16:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2019-12-27 19:16:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:16:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:16:53,492 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:16:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:53,493 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:16:53,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:16:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:53,493 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:53,493 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:53,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:53,696 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash -230087137, now seen corresponding path program 54 times [2019-12-27 19:16:53,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:53,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049514825] [2019-12-27 19:16:53,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:53,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049514825] [2019-12-27 19:16:53,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010327865] [2019-12-27 19:16:53,767 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:53,807 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:16:53,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:53,808 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:53,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:53,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:53,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:16:53,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [759371817] [2019-12-27 19:16:53,937 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:53,939 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:53,941 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 19:16:53,941 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:53,941 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:53,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:53,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:53,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:53,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:53,942 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:16:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:54,123 INFO L93 Difference]: Finished difference Result 146 states and 312 transitions. [2019-12-27 19:16:54,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:54,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:16:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:54,124 INFO L225 Difference]: With dead ends: 146 [2019-12-27 19:16:54,124 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 19:16:54,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:16:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 19:16:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2019-12-27 19:16:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:16:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:16:54,127 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:16:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:54,128 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:16:54,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:16:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:54,128 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:54,128 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:54,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:54,329 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:54,330 INFO L82 PathProgramCache]: Analyzing trace with hash -230087044, now seen corresponding path program 55 times [2019-12-27 19:16:54,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:54,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580118835] [2019-12-27 19:16:54,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:54,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580118835] [2019-12-27 19:16:54,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444479250] [2019-12-27 19:16:54,401 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:54,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:54,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:54,964 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_174 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~i~0_174)) (<= (div (+ (* v_~i~0_174 (- 1)) 1) (- 4)) 1) (<= c_~j~0 (+ v_~i~0_174 1)))) is different from true [2019-12-27 19:16:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:54,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:54,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:16:54,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1084240664] [2019-12-27 19:16:54,965 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:54,966 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:54,968 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 19:16:54,968 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:54,968 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:54,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:54,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:54,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:54,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=157, Unknown=1, NotChecked=26, Total=240 [2019-12-27 19:16:54,969 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:16:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:55,166 INFO L93 Difference]: Finished difference Result 146 states and 312 transitions. [2019-12-27 19:16:55,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:55,166 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:16:55,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:55,167 INFO L225 Difference]: With dead ends: 146 [2019-12-27 19:16:55,168 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 19:16:55,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=292, Unknown=1, NotChecked=38, Total=462 [2019-12-27 19:16:55,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 19:16:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2019-12-27 19:16:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:16:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:16:55,171 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:16:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:55,171 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:16:55,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:55,172 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:16:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:55,172 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:55,172 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:55,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:55,375 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568706, now seen corresponding path program 56 times [2019-12-27 19:16:55,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:55,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334222116] [2019-12-27 19:16:55,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:55,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334222116] [2019-12-27 19:16:55,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484597437] [2019-12-27 19:16:55,442 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:55,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:16:55,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:55,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:55,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:55,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:55,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:16:55,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1505007631] [2019-12-27 19:16:55,592 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:55,593 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:55,595 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 19:16:55,595 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:55,595 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:55,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:55,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:55,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:55,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:55,596 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:16:55,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:55,768 INFO L93 Difference]: Finished difference Result 149 states and 318 transitions. [2019-12-27 19:16:55,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:55,768 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:16:55,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:55,770 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:16:55,770 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:16:55,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:16:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:16:55,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-27 19:16:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:16:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:16:55,773 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:16:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:55,773 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:16:55,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:16:55,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:55,774 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:55,774 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:55,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:55,975 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:55,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1344568799, now seen corresponding path program 57 times [2019-12-27 19:16:55,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:55,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814919881] [2019-12-27 19:16:55,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:56,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814919881] [2019-12-27 19:16:56,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115263176] [2019-12-27 19:16:56,047 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:56,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:16:56,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:56,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:56,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:56,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:56,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:16:56,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1180040338] [2019-12-27 19:16:56,931 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:56,932 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:56,934 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 19:16:56,934 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:56,934 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:56,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:56,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:56,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:16:56,935 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:16:57,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:57,504 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 19:16:57,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:57,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:16:57,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:57,506 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:16:57,506 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:16:57,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=135, Invalid=326, Unknown=1, NotChecked=0, Total=462 [2019-12-27 19:16:57,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:16:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2019-12-27 19:16:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:16:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 19:16:57,509 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 19:16:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:57,509 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 19:16:57,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 19:16:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:57,510 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:57,510 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:57,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:57,712 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:57,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:57,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571589, now seen corresponding path program 58 times [2019-12-27 19:16:57,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:57,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622100512] [2019-12-27 19:16:57,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:57,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622100512] [2019-12-27 19:16:57,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924531419] [2019-12-27 19:16:57,788 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:57,831 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:16:57,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:57,832 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:57,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:16:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:59,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:16:59,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:16:59,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [308229536] [2019-12-27 19:16:59,103 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:16:59,103 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:16:59,105 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 19:16:59,105 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:16:59,106 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:16:59,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:16:59,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:16:59,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:16:59,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=177, Unknown=2, NotChecked=0, Total=240 [2019-12-27 19:16:59,106 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 19:16:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:16:59,349 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2019-12-27 19:16:59,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:16:59,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:16:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:16:59,351 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:16:59,351 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:16:59,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=134, Invalid=326, Unknown=2, NotChecked=0, Total=462 [2019-12-27 19:16:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:16:59,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2019-12-27 19:16:59,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:16:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 19:16:59,354 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 19:16:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:16:59,355 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 19:16:59,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:16:59,355 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 19:16:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:16:59,355 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:16:59,356 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:16:59,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:59,559 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:16:59,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:16:59,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1344571682, now seen corresponding path program 59 times [2019-12-27 19:16:59,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:16:59,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155425577] [2019-12-27 19:16:59,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:16:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:16:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:16:59,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155425577] [2019-12-27 19:16:59,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865329390] [2019-12-27 19:16:59,642 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:16:59,687 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:16:59,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:16:59,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:16:59,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:00,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:00,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:00,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1727406918] [2019-12-27 19:17:00,274 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:00,275 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:00,278 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 19:17:00,278 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:00,278 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:00,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:00,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:00,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:00,279 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 19:17:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:02,185 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 19:17:02,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:02,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:02,186 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:17:02,187 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:17:02,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=137, Invalid=321, Unknown=4, NotChecked=0, Total=462 [2019-12-27 19:17:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:17:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-27 19:17:02,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:02,190 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:02,190 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:02,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:02,191 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:02,191 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:02,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:02,392 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:02,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1380707713, now seen corresponding path program 60 times [2019-12-27 19:17:02,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:02,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480622129] [2019-12-27 19:17:02,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:02,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480622129] [2019-12-27 19:17:02,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2295668] [2019-12-27 19:17:02,477 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:02,520 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:02,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:02,521 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:02,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:02,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:02,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:02,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1565950949] [2019-12-27 19:17:02,629 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:02,630 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:02,632 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:02,632 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:02,632 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:02,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:02,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:02,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:02,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:02,633 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:02,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:02,805 INFO L93 Difference]: Finished difference Result 147 states and 313 transitions. [2019-12-27 19:17:02,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:02,805 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:02,806 INFO L225 Difference]: With dead ends: 147 [2019-12-27 19:17:02,806 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 19:17:02,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 19:17:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2019-12-27 19:17:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:02,811 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:02,811 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:02,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:02,811 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:02,811 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:03,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:03,012 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:03,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:03,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1380707620, now seen corresponding path program 61 times [2019-12-27 19:17:03,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:03,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323054728] [2019-12-27 19:17:03,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:03,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323054728] [2019-12-27 19:17:03,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128801309] [2019-12-27 19:17:03,094 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:03,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:03,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:03,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:03,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:03,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [47199191] [2019-12-27 19:17:03,275 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:03,275 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:03,277 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:03,277 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:03,277 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:03,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:03,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:03,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:03,278 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:03,485 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 19:17:03,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:03,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:03,487 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:17:03,487 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:17:03,487 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:17:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 113. [2019-12-27 19:17:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 19:17:03,490 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 19:17:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:03,490 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 19:17:03,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:03,490 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 19:17:03,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:03,491 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:03,491 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:03,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:03,691 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:03,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704830, now seen corresponding path program 62 times [2019-12-27 19:17:03,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:03,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685803169] [2019-12-27 19:17:03,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:03,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685803169] [2019-12-27 19:17:03,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148014450] [2019-12-27 19:17:03,765 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:03,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:03,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:03,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:03,806 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:03,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:03,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:03,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1659792094] [2019-12-27 19:17:03,953 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:03,954 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:03,957 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:03,957 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:03,957 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:03,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:03,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:03,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:03,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:03,957 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 19:17:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:04,217 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 19:17:04,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:04,218 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:04,219 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:04,219 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:04,219 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2019-12-27 19:17:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 19:17:04,222 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 19:17:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:04,222 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 19:17:04,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 19:17:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:04,222 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:04,223 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:04,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:04,423 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1380704737, now seen corresponding path program 63 times [2019-12-27 19:17:04,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:04,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781284852] [2019-12-27 19:17:04,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:04,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781284852] [2019-12-27 19:17:04,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092821413] [2019-12-27 19:17:04,502 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:04,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:17:04,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:04,545 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:04,545 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:04,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:04,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:04,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1601133793] [2019-12-27 19:17:04,698 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:04,699 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:04,700 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:04,700 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:04,701 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:04,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:04,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:04,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:04,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:04,701 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 19:17:04,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:04,913 INFO L93 Difference]: Finished difference Result 151 states and 326 transitions. [2019-12-27 19:17:04,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:04,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:04,915 INFO L225 Difference]: With dead ends: 151 [2019-12-27 19:17:04,915 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 19:17:04,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 19:17:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2019-12-27 19:17:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:17:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 19:17:04,917 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 19:17:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:04,918 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 19:17:04,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 19:17:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:04,918 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:04,918 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:05,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:05,119 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:05,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:05,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618340, now seen corresponding path program 64 times [2019-12-27 19:17:05,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:05,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548581850] [2019-12-27 19:17:05,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:05,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548581850] [2019-12-27 19:17:05,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629883146] [2019-12-27 19:17:05,197 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:05,245 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:05,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:05,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:05,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:05,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:05,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:05,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [406818279] [2019-12-27 19:17:05,405 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:05,405 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:05,407 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:05,407 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:05,407 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:05,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:05,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:05,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:05,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:05,408 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 19:17:05,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:05,623 INFO L93 Difference]: Finished difference Result 152 states and 324 transitions. [2019-12-27 19:17:05,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:05,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:05,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:05,624 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:05,625 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:05,625 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2019-12-27 19:17:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:17:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 256 transitions. [2019-12-27 19:17:05,627 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 256 transitions. Word has length 13 [2019-12-27 19:17:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:05,628 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 256 transitions. [2019-12-27 19:17:05,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 256 transitions. [2019-12-27 19:17:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:05,628 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:05,628 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:05,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:05,831 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1380618247, now seen corresponding path program 65 times [2019-12-27 19:17:05,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:05,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101499116] [2019-12-27 19:17:05,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:05,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101499116] [2019-12-27 19:17:05,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739123691] [2019-12-27 19:17:05,915 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:05,974 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:05,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:05,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:05,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:06,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:06,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:06,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1337283789] [2019-12-27 19:17:06,285 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:06,287 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:06,289 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:06,289 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:06,290 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:06,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:06,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:06,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:06,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:06,291 INFO L87 Difference]: Start difference. First operand 112 states and 256 transitions. Second operand 9 states. [2019-12-27 19:17:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:06,564 INFO L93 Difference]: Finished difference Result 152 states and 327 transitions. [2019-12-27 19:17:06,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:06,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:06,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:06,565 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:06,566 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:06,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 113. [2019-12-27 19:17:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 19:17:06,568 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 19:17:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:06,569 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 19:17:06,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 19:17:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:06,570 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:06,570 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:06,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:06,773 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1380615457, now seen corresponding path program 66 times [2019-12-27 19:17:06,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:06,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5715403] [2019-12-27 19:17:06,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:06,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5715403] [2019-12-27 19:17:06,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690830487] [2019-12-27 19:17:06,849 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:06,912 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:06,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:06,913 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:06,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:11,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:11,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:11,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1836613772] [2019-12-27 19:17:11,154 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:11,155 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:11,158 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:11,158 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:11,158 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:11,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:11,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:11,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:11,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:11,159 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 19:17:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:11,491 INFO L93 Difference]: Finished difference Result 153 states and 328 transitions. [2019-12-27 19:17:11,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:11,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:11,493 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:11,493 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:11,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2019-12-27 19:17:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 260 transitions. [2019-12-27 19:17:11,497 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 260 transitions. Word has length 13 [2019-12-27 19:17:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:11,497 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 260 transitions. [2019-12-27 19:17:11,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 260 transitions. [2019-12-27 19:17:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:11,497 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:11,498 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:11,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:11,701 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1380615364, now seen corresponding path program 67 times [2019-12-27 19:17:11,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:11,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6345026] [2019-12-27 19:17:11,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:11,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6345026] [2019-12-27 19:17:11,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353244114] [2019-12-27 19:17:11,800 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:11,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:11,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:12,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:12,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:12,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1870577373] [2019-12-27 19:17:12,031 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:12,033 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:12,034 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 19:17:12,034 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:12,034 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:12,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:12,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:12,035 INFO L87 Difference]: Start difference. First operand 113 states and 260 transitions. Second operand 9 states. [2019-12-27 19:17:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:12,260 INFO L93 Difference]: Finished difference Result 149 states and 321 transitions. [2019-12-27 19:17:12,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:12,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:12,262 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:17:12,262 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:17:12,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:17:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2019-12-27 19:17:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 252 transitions. [2019-12-27 19:17:12,266 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 252 transitions. Word has length 13 [2019-12-27 19:17:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:12,266 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 252 transitions. [2019-12-27 19:17:12,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 252 transitions. [2019-12-27 19:17:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:12,267 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:12,267 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:12,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:12,470 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:12,471 INFO L82 PathProgramCache]: Analyzing trace with hash 35069218, now seen corresponding path program 68 times [2019-12-27 19:17:12,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:12,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591207161] [2019-12-27 19:17:12,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:12,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591207161] [2019-12-27 19:17:12,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487310981] [2019-12-27 19:17:12,557 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:12,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:12,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:12,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:12,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:12,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:12,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:12,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2105897740] [2019-12-27 19:17:12,688 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:12,689 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:12,691 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:12,691 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:12,692 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:12,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:12,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:12,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:12,692 INFO L87 Difference]: Start difference. First operand 111 states and 252 transitions. Second operand 9 states. [2019-12-27 19:17:12,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:12,851 INFO L93 Difference]: Finished difference Result 141 states and 298 transitions. [2019-12-27 19:17:12,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:12,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:12,852 INFO L225 Difference]: With dead ends: 141 [2019-12-27 19:17:12,852 INFO L226 Difference]: Without dead ends: 140 [2019-12-27 19:17:12,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-12-27 19:17:12,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2019-12-27 19:17:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:12,855 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:12,855 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:12,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:12,856 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:12,856 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:13,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:13,058 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash 35069311, now seen corresponding path program 69 times [2019-12-27 19:17:13,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:13,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6758309] [2019-12-27 19:17:13,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:13,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6758309] [2019-12-27 19:17:13,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259703590] [2019-12-27 19:17:13,143 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:13,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:17:13,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:13,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:13,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:13,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:13,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:13,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [295356887] [2019-12-27 19:17:13,288 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:13,289 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:13,290 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:13,290 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:13,291 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:13,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:13,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:13,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:13,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:13,291 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:13,497 INFO L93 Difference]: Finished difference Result 150 states and 319 transitions. [2019-12-27 19:17:13,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:13,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:13,499 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:13,499 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:13,499 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2019-12-27 19:17:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:13,503 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:13,503 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:13,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:13,504 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:13,504 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:13,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:13,707 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:13,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:13,708 INFO L82 PathProgramCache]: Analyzing trace with hash 35072101, now seen corresponding path program 70 times [2019-12-27 19:17:13,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:13,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577737242] [2019-12-27 19:17:13,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:13,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577737242] [2019-12-27 19:17:13,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576402437] [2019-12-27 19:17:13,780 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:13,819 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:13,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:13,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:13,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:14,137 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 19:17:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:14,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:14,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:14,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2001204994] [2019-12-27 19:17:14,140 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:14,141 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:14,143 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:14,143 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:14,143 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:14,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:14,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:14,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:14,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:14,144 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:14,749 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 19:17:14,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:17:14,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:14,755 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:14,755 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:14,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:17:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 117. [2019-12-27 19:17:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:14,758 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:14,759 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:14,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:14,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:14,759 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:14,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:14,962 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:14,963 INFO L82 PathProgramCache]: Analyzing trace with hash 35072194, now seen corresponding path program 71 times [2019-12-27 19:17:14,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:14,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336935587] [2019-12-27 19:17:14,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:15,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336935587] [2019-12-27 19:17:15,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657565149] [2019-12-27 19:17:15,035 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:15,078 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:15,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:15,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:15,080 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:15,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:15,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:15,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1341631595] [2019-12-27 19:17:15,180 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:15,181 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:15,183 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:15,183 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:15,183 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:15,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:15,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:15,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:15,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:15,184 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:15,370 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 19:17:15,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:15,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:15,372 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:15,372 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:15,372 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:15,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2019-12-27 19:17:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:17:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 19:17:15,375 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 19:17:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:15,376 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 19:17:15,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 19:17:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:15,376 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:15,376 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:15,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:15,578 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:15,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash 35158591, now seen corresponding path program 72 times [2019-12-27 19:17:15,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:15,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376682745] [2019-12-27 19:17:15,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:15,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376682745] [2019-12-27 19:17:15,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444211696] [2019-12-27 19:17:15,652 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:15,697 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:15,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:15,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:15,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:15,936 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 19:17:16,077 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 19:17:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:16,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:16,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:16,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [353809478] [2019-12-27 19:17:16,078 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:16,079 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:16,081 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:16,081 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:16,081 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:16,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:16,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:16,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:16,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:16,082 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 19:17:16,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:16,342 INFO L93 Difference]: Finished difference Result 154 states and 329 transitions. [2019-12-27 19:17:16,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:16,343 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:16,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:16,344 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:16,344 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:16,345 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:16,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:16,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2019-12-27 19:17:16,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:17:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 19:17:16,348 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 19:17:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:16,348 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 19:17:16,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 19:17:16,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:16,349 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:16,349 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:16,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:16,549 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:16,550 INFO L82 PathProgramCache]: Analyzing trace with hash 35158684, now seen corresponding path program 73 times [2019-12-27 19:17:16,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:16,551 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206522843] [2019-12-27 19:17:16,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:16,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206522843] [2019-12-27 19:17:16,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294013824] [2019-12-27 19:17:16,640 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:16,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:16,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:17,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:17,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:17,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1749802494] [2019-12-27 19:17:17,326 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:17,328 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:17,330 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:17,330 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:17,330 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:17,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:17,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2019-12-27 19:17:17,331 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 19:17:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:17,595 INFO L93 Difference]: Finished difference Result 154 states and 332 transitions. [2019-12-27 19:17:17,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:17,595 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:17,597 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:17,597 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:17,597 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=361, Unknown=1, NotChecked=0, Total=506 [2019-12-27 19:17:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 117. [2019-12-27 19:17:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:17,600 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:17,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:17,600 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:17,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:17,600 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:17,601 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:17,601 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:17,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:17,802 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:17,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash 35161474, now seen corresponding path program 74 times [2019-12-27 19:17:17,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:17,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952631249] [2019-12-27 19:17:17,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:17,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952631249] [2019-12-27 19:17:17,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75617467] [2019-12-27 19:17:17,868 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:17,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:17,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:17,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:17,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:18,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:18,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:18,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1304708842] [2019-12-27 19:17:18,399 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:18,400 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:18,402 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:18,402 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:18,402 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:18,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:18,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:18,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:18,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:18,402 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:18,654 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2019-12-27 19:17:18,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:18,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:18,656 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:18,656 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:18,656 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 117. [2019-12-27 19:17:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:18,659 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:18,660 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:18,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:18,660 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:18,660 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:18,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:18,861 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash 35161567, now seen corresponding path program 75 times [2019-12-27 19:17:18,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:18,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170474064] [2019-12-27 19:17:18,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:18,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170474064] [2019-12-27 19:17:18,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034911556] [2019-12-27 19:17:18,931 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:18,972 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:18,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:18,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:18,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:19,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:19,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:19,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1598419758] [2019-12-27 19:17:19,079 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:19,080 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:19,082 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:19,082 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:19,082 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:19,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:19,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:19,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:19,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:19,083 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:19,267 INFO L93 Difference]: Finished difference Result 153 states and 328 transitions. [2019-12-27 19:17:19,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:19,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:19,269 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:19,269 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:19,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2019-12-27 19:17:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:19,272 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:19,273 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:19,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:19,273 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:19,273 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:19,273 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:19,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:19,474 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash 37839781, now seen corresponding path program 76 times [2019-12-27 19:17:19,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:19,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214509590] [2019-12-27 19:17:19,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:19,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214509590] [2019-12-27 19:17:19,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380689741] [2019-12-27 19:17:19,546 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:19,588 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:19,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:19,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:19,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:19,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:19,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:19,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1032886760] [2019-12-27 19:17:19,696 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:19,697 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:19,699 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:19,699 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:19,699 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:19,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:19,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:19,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:19,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:19,700 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:19,876 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2019-12-27 19:17:19,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:19,877 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:19,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:19,878 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:19,878 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:19,879 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:19,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 115. [2019-12-27 19:17:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:19,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:19,882 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:19,883 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:19,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:19,883 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:19,883 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:20,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:20,087 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:20,087 INFO L82 PathProgramCache]: Analyzing trace with hash 37839874, now seen corresponding path program 77 times [2019-12-27 19:17:20,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:20,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313223065] [2019-12-27 19:17:20,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:20,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313223065] [2019-12-27 19:17:20,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962850483] [2019-12-27 19:17:20,164 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:20,206 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:20,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:20,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:20,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:20,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:20,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:20,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1918526933] [2019-12-27 19:17:20,319 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:20,320 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:20,322 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:20,322 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:20,322 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:20,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:20,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:20,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:20,323 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:20,540 INFO L93 Difference]: Finished difference Result 151 states and 329 transitions. [2019-12-27 19:17:20,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:20,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:20,542 INFO L225 Difference]: With dead ends: 151 [2019-12-27 19:17:20,542 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 19:17:20,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 19:17:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 117. [2019-12-27 19:17:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:20,546 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:20,546 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:20,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:20,546 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:20,546 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:20,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:20,749 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:20,750 INFO L82 PathProgramCache]: Analyzing trace with hash 37842664, now seen corresponding path program 78 times [2019-12-27 19:17:20,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:20,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212245820] [2019-12-27 19:17:20,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:20,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212245820] [2019-12-27 19:17:20,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72346181] [2019-12-27 19:17:20,821 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:20,859 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:20,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:20,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:20,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:20,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:20,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:20,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1358142281] [2019-12-27 19:17:20,951 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:20,952 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:20,954 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:20,954 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:20,954 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:20,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:20,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:20,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:20,955 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:21,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:21,154 INFO L93 Difference]: Finished difference Result 153 states and 331 transitions. [2019-12-27 19:17:21,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:21,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:21,155 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:21,156 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:21,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 117. [2019-12-27 19:17:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:21,159 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:21,159 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:21,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:21,159 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:21,159 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:21,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:21,363 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:21,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:21,363 INFO L82 PathProgramCache]: Analyzing trace with hash 37842757, now seen corresponding path program 79 times [2019-12-27 19:17:21,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:21,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335616264] [2019-12-27 19:17:21,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:21,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335616264] [2019-12-27 19:17:21,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211932281] [2019-12-27 19:17:21,431 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:21,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:21,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:21,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:21,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:21,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1031731820] [2019-12-27 19:17:21,563 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:21,564 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:21,566 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:21,566 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:21,566 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:21,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:21,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:21,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:21,567 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:21,763 INFO L93 Difference]: Finished difference Result 151 states and 326 transitions. [2019-12-27 19:17:21,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:21,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:21,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:21,764 INFO L225 Difference]: With dead ends: 151 [2019-12-27 19:17:21,765 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 19:17:21,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 19:17:21,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 116. [2019-12-27 19:17:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:17:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 19:17:21,768 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 19:17:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:21,768 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 19:17:21,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 19:17:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:21,768 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:21,768 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:21,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:21,969 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:21,970 INFO L82 PathProgramCache]: Analyzing trace with hash 37929154, now seen corresponding path program 80 times [2019-12-27 19:17:21,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:21,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453980271] [2019-12-27 19:17:21,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:22,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453980271] [2019-12-27 19:17:22,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663381757] [2019-12-27 19:17:22,044 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:22,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:22,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:22,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:22,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:22,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:22,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:22,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1187252080] [2019-12-27 19:17:22,207 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:22,208 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:22,210 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:22,210 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:22,210 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:22,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:22,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:22,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:22,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:22,211 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 19:17:22,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:22,410 INFO L93 Difference]: Finished difference Result 156 states and 334 transitions. [2019-12-27 19:17:22,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:22,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:22,411 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:22,412 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:22,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 116. [2019-12-27 19:17:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 19:17:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 263 transitions. [2019-12-27 19:17:22,414 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 263 transitions. Word has length 13 [2019-12-27 19:17:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:22,415 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 263 transitions. [2019-12-27 19:17:22,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:22,415 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 263 transitions. [2019-12-27 19:17:22,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:22,415 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:22,415 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:22,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:22,616 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:22,617 INFO L82 PathProgramCache]: Analyzing trace with hash 37929247, now seen corresponding path program 81 times [2019-12-27 19:17:22,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:22,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099814505] [2019-12-27 19:17:22,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:22,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099814505] [2019-12-27 19:17:22,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868294568] [2019-12-27 19:17:22,692 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:22,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:17:22,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:22,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:22,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:24,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:24,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:24,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [88765182] [2019-12-27 19:17:24,062 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:24,063 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:24,064 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:24,064 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:24,065 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:24,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:24,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:24,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:24,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:24,065 INFO L87 Difference]: Start difference. First operand 116 states and 263 transitions. Second operand 9 states. [2019-12-27 19:17:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:24,890 INFO L93 Difference]: Finished difference Result 152 states and 330 transitions. [2019-12-27 19:17:24,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:24,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:24,892 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:24,892 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:24,892 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=129, Invalid=332, Unknown=1, NotChecked=0, Total=462 [2019-12-27 19:17:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2019-12-27 19:17:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:24,896 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:24,896 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:24,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:24,897 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:24,897 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:25,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:25,098 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:25,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:25,099 INFO L82 PathProgramCache]: Analyzing trace with hash 37932037, now seen corresponding path program 82 times [2019-12-27 19:17:25,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:25,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490893271] [2019-12-27 19:17:25,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:25,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490893271] [2019-12-27 19:17:25,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433852991] [2019-12-27 19:17:25,186 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:25,225 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:25,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:25,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:25,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:25,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:25,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:25,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [551170269] [2019-12-27 19:17:25,322 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:25,323 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:25,324 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:25,325 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:25,325 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:25,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:25,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:25,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:25,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:25,325 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:25,527 INFO L93 Difference]: Finished difference Result 152 states and 327 transitions. [2019-12-27 19:17:25,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:25,527 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:25,529 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:25,529 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:25,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:25,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:25,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2019-12-27 19:17:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 19:17:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 267 transitions. [2019-12-27 19:17:25,532 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 267 transitions. Word has length 13 [2019-12-27 19:17:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:25,533 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 267 transitions. [2019-12-27 19:17:25,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 267 transitions. [2019-12-27 19:17:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:25,533 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:25,534 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:25,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:25,734 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:25,735 INFO L82 PathProgramCache]: Analyzing trace with hash 37932130, now seen corresponding path program 83 times [2019-12-27 19:17:25,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:25,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180214210] [2019-12-27 19:17:25,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:25,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180214210] [2019-12-27 19:17:25,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651103433] [2019-12-27 19:17:25,804 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:25,847 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:25,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:25,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:25,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:25,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:25,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:25,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [637008401] [2019-12-27 19:17:25,954 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:25,955 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:25,957 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:25,957 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:25,957 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:17:25,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:25,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:25,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:25,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:25,958 INFO L87 Difference]: Start difference. First operand 117 states and 267 transitions. Second operand 9 states. [2019-12-27 19:17:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:26,125 INFO L93 Difference]: Finished difference Result 147 states and 316 transitions. [2019-12-27 19:17:26,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:26,125 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:26,127 INFO L225 Difference]: With dead ends: 147 [2019-12-27 19:17:26,127 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 19:17:26,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:26,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 19:17:26,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 115. [2019-12-27 19:17:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:26,130 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:26,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:26,130 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:26,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:26,131 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:26,131 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:26,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:26,332 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash 974481212, now seen corresponding path program 84 times [2019-12-27 19:17:26,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:26,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413161036] [2019-12-27 19:17:26,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:26,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413161036] [2019-12-27 19:17:26,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629136317] [2019-12-27 19:17:26,401 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:26,443 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:26,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:26,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:26,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:26,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:26,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:26,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [703377620] [2019-12-27 19:17:26,547 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:26,548 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:26,550 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 19:17:26,550 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:26,552 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 19:17:26,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:26,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:26,553 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:26,789 INFO L93 Difference]: Finished difference Result 142 states and 302 transitions. [2019-12-27 19:17:26,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:26,789 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:26,790 INFO L225 Difference]: With dead ends: 142 [2019-12-27 19:17:26,790 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 19:17:26,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 19:17:26,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2019-12-27 19:17:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:26,793 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:26,793 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:26,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:26,794 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:26,794 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:26,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:26,997 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:26,997 INFO L82 PathProgramCache]: Analyzing trace with hash 974484002, now seen corresponding path program 85 times [2019-12-27 19:17:26,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:26,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593095753] [2019-12-27 19:17:26,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:27,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593095753] [2019-12-27 19:17:27,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082963411] [2019-12-27 19:17:27,068 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:27,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:27,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:28,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:28,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:28,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1778494521] [2019-12-27 19:17:28,385 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:28,386 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:28,387 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 19:17:28,387 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:28,389 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:17:28,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:28,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:28,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:28,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=179, Unknown=3, NotChecked=0, Total=240 [2019-12-27 19:17:28,389 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:28,619 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 19:17:28,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:28,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:28,620 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:28,620 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:28,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=133, Invalid=326, Unknown=3, NotChecked=0, Total=462 [2019-12-27 19:17:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2019-12-27 19:17:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:28,623 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:28,623 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:28,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:28,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:28,624 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:28,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:28,825 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash 974484095, now seen corresponding path program 86 times [2019-12-27 19:17:28,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:28,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11307645] [2019-12-27 19:17:28,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:28,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11307645] [2019-12-27 19:17:28,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677911101] [2019-12-27 19:17:28,895 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:28,935 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:28,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:28,936 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:28,936 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:29,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:29,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:29,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [213827277] [2019-12-27 19:17:29,050 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:29,051 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:29,052 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 19:17:29,053 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:29,053 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:17:29,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:29,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:29,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:29,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:29,054 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:29,239 INFO L93 Difference]: Finished difference Result 148 states and 314 transitions. [2019-12-27 19:17:29,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:29,240 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:29,241 INFO L225 Difference]: With dead ends: 148 [2019-12-27 19:17:29,241 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 19:17:29,241 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 19:17:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 113. [2019-12-27 19:17:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 19:17:29,245 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 19:17:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:29,245 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 19:17:29,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 19:17:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:29,245 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:29,245 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:29,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:29,446 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:29,447 INFO L82 PathProgramCache]: Analyzing trace with hash 974570492, now seen corresponding path program 87 times [2019-12-27 19:17:29,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:29,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653770919] [2019-12-27 19:17:29,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:29,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653770919] [2019-12-27 19:17:29,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677906135] [2019-12-27 19:17:29,525 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:29,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:29,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:29,567 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:29,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:30,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:30,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:30,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2063903907] [2019-12-27 19:17:30,483 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:30,484 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:30,486 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:30,486 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:30,488 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:17:30,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:30,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:30,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:30,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:30,488 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 19:17:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:31,753 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2019-12-27 19:17:31,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:31,753 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:31,755 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:31,755 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:31,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=324, Unknown=1, NotChecked=0, Total=462 [2019-12-27 19:17:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2019-12-27 19:17:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:31,758 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:31,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:31,759 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:31,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:31,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:31,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:31,759 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:31,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:31,963 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash 974570585, now seen corresponding path program 88 times [2019-12-27 19:17:31,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:31,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238530649] [2019-12-27 19:17:31,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:32,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238530649] [2019-12-27 19:17:32,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057065386] [2019-12-27 19:17:32,032 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:32,086 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:32,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:32,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:32,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:32,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:32,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:32,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [769835476] [2019-12-27 19:17:32,971 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:32,972 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:32,974 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:32,974 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:32,975 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:17:32,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:32,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:32,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:32,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:32,975 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:33,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:33,850 INFO L93 Difference]: Finished difference Result 154 states and 326 transitions. [2019-12-27 19:17:33,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:33,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:33,852 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:33,852 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:33,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=134, Invalid=327, Unknown=1, NotChecked=0, Total=462 [2019-12-27 19:17:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 114. [2019-12-27 19:17:33,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:33,855 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:33,856 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:33,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:33,856 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:33,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:33,856 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:33,856 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:34,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:34,057 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:34,057 INFO L82 PathProgramCache]: Analyzing trace with hash 974573375, now seen corresponding path program 89 times [2019-12-27 19:17:34,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:34,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387474910] [2019-12-27 19:17:34,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:34,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387474910] [2019-12-27 19:17:34,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218081646] [2019-12-27 19:17:34,132 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:34,172 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:34,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:34,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:34,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:34,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:34,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:34,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1974437644] [2019-12-27 19:17:34,318 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:34,319 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:34,321 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:34,321 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:34,322 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:17:34,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:34,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:34,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:34,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:34,323 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:34,531 INFO L93 Difference]: Finished difference Result 155 states and 327 transitions. [2019-12-27 19:17:34,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:34,532 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:34,533 INFO L225 Difference]: With dead ends: 155 [2019-12-27 19:17:34,533 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 19:17:34,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 19:17:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 115. [2019-12-27 19:17:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:34,536 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:34,536 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:34,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:34,537 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:34,537 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:34,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:34,740 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:34,741 INFO L82 PathProgramCache]: Analyzing trace with hash 974573468, now seen corresponding path program 90 times [2019-12-27 19:17:34,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:34,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479825437] [2019-12-27 19:17:34,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:34,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479825437] [2019-12-27 19:17:34,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904457785] [2019-12-27 19:17:34,820 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:34,862 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:17:34,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:34,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:34,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:34,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:34,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:34,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1480749176] [2019-12-27 19:17:34,981 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:34,982 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:34,984 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:17:34,984 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:34,988 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 19:17:34,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:34,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:34,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:34,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:34,989 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:35,172 INFO L93 Difference]: Finished difference Result 149 states and 315 transitions. [2019-12-27 19:17:35,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:35,172 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:35,173 INFO L225 Difference]: With dead ends: 149 [2019-12-27 19:17:35,174 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 19:17:35,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 19:17:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2019-12-27 19:17:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:17:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 247 transitions. [2019-12-27 19:17:35,177 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 247 transitions. Word has length 13 [2019-12-27 19:17:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:35,177 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 247 transitions. [2019-12-27 19:17:35,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:35,177 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 247 transitions. [2019-12-27 19:17:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:35,178 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:35,178 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:35,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:35,381 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:35,381 INFO L82 PathProgramCache]: Analyzing trace with hash 977251682, now seen corresponding path program 91 times [2019-12-27 19:17:35,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:35,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015988890] [2019-12-27 19:17:35,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:35,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015988890] [2019-12-27 19:17:35,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876838041] [2019-12-27 19:17:35,481 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:35,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:35,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:35,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:35,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:35,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [916970436] [2019-12-27 19:17:35,723 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:35,724 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:35,726 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:35,726 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:35,727 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:35,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:35,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:35,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:35,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:35,728 INFO L87 Difference]: Start difference. First operand 112 states and 247 transitions. Second operand 9 states. [2019-12-27 19:17:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:35,973 INFO L93 Difference]: Finished difference Result 159 states and 334 transitions. [2019-12-27 19:17:35,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:35,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:35,974 INFO L225 Difference]: With dead ends: 159 [2019-12-27 19:17:35,974 INFO L226 Difference]: Without dead ends: 158 [2019-12-27 19:17:35,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-27 19:17:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 115. [2019-12-27 19:17:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:35,978 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:35,979 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:35,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:35,979 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:35,979 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:36,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:36,182 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:36,183 INFO L82 PathProgramCache]: Analyzing trace with hash 977251775, now seen corresponding path program 92 times [2019-12-27 19:17:36,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:36,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995880693] [2019-12-27 19:17:36,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:36,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995880693] [2019-12-27 19:17:36,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395166696] [2019-12-27 19:17:36,262 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:36,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:36,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:36,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:36,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:42,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:42,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:42,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [584816868] [2019-12-27 19:17:42,588 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:42,590 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:42,592 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:42,592 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:42,593 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:42,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:42,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:42,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:42,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:42,594 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:44,845 INFO L93 Difference]: Finished difference Result 153 states and 325 transitions. [2019-12-27 19:17:44,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:44,845 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:44,846 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:44,846 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:44,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=130, Invalid=331, Unknown=1, NotChecked=0, Total=462 [2019-12-27 19:17:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2019-12-27 19:17:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:44,849 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:44,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:44,850 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:44,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:44,850 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:44,851 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:45,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:45,051 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:45,052 INFO L82 PathProgramCache]: Analyzing trace with hash 977254565, now seen corresponding path program 93 times [2019-12-27 19:17:45,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:45,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116908940] [2019-12-27 19:17:45,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:45,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116908940] [2019-12-27 19:17:45,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127026126] [2019-12-27 19:17:45,130 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:45,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:45,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:45,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:45,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:45,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:45,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:45,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [878534311] [2019-12-27 19:17:45,350 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:45,351 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:45,352 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:45,353 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:45,353 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:45,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:45,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:45,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:45,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:45,354 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:45,577 INFO L93 Difference]: Finished difference Result 154 states and 326 transitions. [2019-12-27 19:17:45,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:45,577 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:45,578 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:45,578 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:45,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 115. [2019-12-27 19:17:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:45,581 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:45,581 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:45,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:45,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:45,582 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:45,582 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:45,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:45,783 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:45,783 INFO L82 PathProgramCache]: Analyzing trace with hash 977254658, now seen corresponding path program 94 times [2019-12-27 19:17:45,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:45,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187464074] [2019-12-27 19:17:45,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:45,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187464074] [2019-12-27 19:17:45,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857763581] [2019-12-27 19:17:45,865 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:45,907 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:45,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:45,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:45,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:46,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:46,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:46,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [954063332] [2019-12-27 19:17:46,076 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:46,077 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:46,078 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:46,078 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:46,079 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:46,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:46,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:46,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:46,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:46,080 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:46,298 INFO L93 Difference]: Finished difference Result 154 states and 326 transitions. [2019-12-27 19:17:46,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:46,299 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:46,299 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:46,299 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:46,300 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:46,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 113. [2019-12-27 19:17:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 19:17:46,302 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 19:17:46,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:46,302 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 19:17:46,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:46,302 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 19:17:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:46,302 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:46,303 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:46,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:46,503 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:46,504 INFO L82 PathProgramCache]: Analyzing trace with hash 977341055, now seen corresponding path program 95 times [2019-12-27 19:17:46,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:46,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623615895] [2019-12-27 19:17:46,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:46,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623615895] [2019-12-27 19:17:46,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723187754] [2019-12-27 19:17:46,590 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:46,633 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:17:46,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:46,634 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:46,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:46,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:46,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:46,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [89060360] [2019-12-27 19:17:46,790 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:46,791 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:46,792 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:46,792 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:46,793 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:46,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:46,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:46,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:46,794 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 19:17:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:47,014 INFO L93 Difference]: Finished difference Result 158 states and 333 transitions. [2019-12-27 19:17:47,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:47,015 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:47,016 INFO L225 Difference]: With dead ends: 158 [2019-12-27 19:17:47,016 INFO L226 Difference]: Without dead ends: 157 [2019-12-27 19:17:47,016 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-27 19:17:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 115. [2019-12-27 19:17:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:47,019 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:47,019 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:47,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:47,020 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:47,020 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:47,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:47,223 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:47,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:47,224 INFO L82 PathProgramCache]: Analyzing trace with hash 977341148, now seen corresponding path program 96 times [2019-12-27 19:17:47,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:47,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863146423] [2019-12-27 19:17:47,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:47,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863146423] [2019-12-27 19:17:47,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054407999] [2019-12-27 19:17:47,298 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:47,342 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:47,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:47,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:47,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:47,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:47,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:47,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2122952088] [2019-12-27 19:17:47,506 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:47,508 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:47,510 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:47,510 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:47,512 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:47,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:47,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:47,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:47,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:47,513 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:47,800 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2019-12-27 19:17:47,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:47,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:47,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:47,802 INFO L225 Difference]: With dead ends: 157 [2019-12-27 19:17:47,802 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 19:17:47,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 19:17:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 114. [2019-12-27 19:17:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:47,805 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:47,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:47,805 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:47,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:47,806 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:47,806 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:48,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:48,009 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:48,009 INFO L82 PathProgramCache]: Analyzing trace with hash 977343938, now seen corresponding path program 97 times [2019-12-27 19:17:48,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:48,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942100830] [2019-12-27 19:17:48,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:48,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942100830] [2019-12-27 19:17:48,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234207582] [2019-12-27 19:17:48,083 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:48,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:48,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:48,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:48,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:48,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [976129380] [2019-12-27 19:17:48,252 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:48,252 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:48,254 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:48,254 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:48,254 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:48,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:48,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:48,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:48,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:48,255 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:48,465 INFO L93 Difference]: Finished difference Result 152 states and 321 transitions. [2019-12-27 19:17:48,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:48,466 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:48,466 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:48,467 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:48,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:48,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2019-12-27 19:17:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:48,469 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:48,469 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:48,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:48,470 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:48,470 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:48,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:48,671 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash 977344031, now seen corresponding path program 98 times [2019-12-27 19:17:48,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:48,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082845437] [2019-12-27 19:17:48,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:48,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082845437] [2019-12-27 19:17:48,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662643914] [2019-12-27 19:17:48,736 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:48,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:48,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:48,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:48,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:48,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:48,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:48,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [950897615] [2019-12-27 19:17:48,879 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:48,880 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:48,882 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 19:17:48,882 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:48,882 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:17:48,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:48,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:48,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:48,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:48,883 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:49,059 INFO L93 Difference]: Finished difference Result 144 states and 304 transitions. [2019-12-27 19:17:49,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:49,059 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:49,060 INFO L225 Difference]: With dead ends: 144 [2019-12-27 19:17:49,060 INFO L226 Difference]: Without dead ends: 143 [2019-12-27 19:17:49,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-27 19:17:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2019-12-27 19:17:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 19:17:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 243 transitions. [2019-12-27 19:17:49,063 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 243 transitions. Word has length 13 [2019-12-27 19:17:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:49,064 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 243 transitions. [2019-12-27 19:17:49,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 243 transitions. [2019-12-27 19:17:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:49,064 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:49,064 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:49,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:49,265 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:49,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1060368572, now seen corresponding path program 99 times [2019-12-27 19:17:49,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:49,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073296652] [2019-12-27 19:17:49,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:49,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073296652] [2019-12-27 19:17:49,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078935262] [2019-12-27 19:17:49,337 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:49,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:49,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:49,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:49,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:49,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:49,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:49,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2405208] [2019-12-27 19:17:49,472 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:49,473 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:49,474 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:49,474 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:49,475 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:49,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:49,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:49,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:49,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:49,476 INFO L87 Difference]: Start difference. First operand 111 states and 243 transitions. Second operand 9 states. [2019-12-27 19:17:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:49,651 INFO L93 Difference]: Finished difference Result 141 states and 298 transitions. [2019-12-27 19:17:49,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:49,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:49,652 INFO L225 Difference]: With dead ends: 141 [2019-12-27 19:17:49,653 INFO L226 Difference]: Without dead ends: 140 [2019-12-27 19:17:49,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-12-27 19:17:49,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 115. [2019-12-27 19:17:49,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:49,655 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:49,656 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:49,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:49,656 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:49,656 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:49,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:49,859 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:49,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1060368665, now seen corresponding path program 100 times [2019-12-27 19:17:49,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:49,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306240061] [2019-12-27 19:17:49,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:49,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306240061] [2019-12-27 19:17:49,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650439371] [2019-12-27 19:17:49,926 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:49,965 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:49,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:49,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:49,967 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:50,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:50,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:50,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1784283815] [2019-12-27 19:17:50,069 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:50,070 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:50,071 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:50,071 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:50,072 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:50,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:50,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:50,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:50,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:50,072 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:50,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:50,281 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 19:17:50,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:50,282 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:50,283 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:50,283 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:50,283 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2019-12-27 19:17:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:50,286 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:50,286 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:50,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:50,287 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:50,287 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:50,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:50,487 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:50,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:50,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1060371455, now seen corresponding path program 101 times [2019-12-27 19:17:50,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:50,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147464550] [2019-12-27 19:17:50,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:50,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147464550] [2019-12-27 19:17:50,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841216372] [2019-12-27 19:17:50,584 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:50,625 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:17:50,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:50,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:50,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:50,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:50,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:50,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [681892255] [2019-12-27 19:17:50,750 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:50,750 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:50,752 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:50,752 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:50,753 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:50,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:50,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:50,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:50,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:50,753 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:50,988 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2019-12-27 19:17:50,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:50,989 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:50,989 INFO L225 Difference]: With dead ends: 153 [2019-12-27 19:17:50,990 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 19:17:50,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:50,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 19:17:50,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2019-12-27 19:17:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:50,992 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:50,993 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:50,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:50,993 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:50,993 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:51,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:51,194 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:51,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1060371548, now seen corresponding path program 102 times [2019-12-27 19:17:51,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:51,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262924142] [2019-12-27 19:17:51,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:51,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262924142] [2019-12-27 19:17:51,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723898763] [2019-12-27 19:17:51,267 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:51,310 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:17:51,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:51,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:51,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:51,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:51,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:51,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2005601046] [2019-12-27 19:17:51,430 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:51,431 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:51,433 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:51,433 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:51,434 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:51,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:51,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:51,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:51,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:51,434 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:51,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:51,636 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 19:17:51,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:51,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:51,637 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:51,637 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:51,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:51,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2019-12-27 19:17:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:17:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 19:17:51,640 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 19:17:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:51,640 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 19:17:51,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 19:17:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:51,640 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:51,640 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:51,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:51,841 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:51,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1060457945, now seen corresponding path program 103 times [2019-12-27 19:17:51,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:51,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212511924] [2019-12-27 19:17:51,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:51,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212511924] [2019-12-27 19:17:51,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454663757] [2019-12-27 19:17:51,905 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:51,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:51,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:52,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:52,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:52,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1272702999] [2019-12-27 19:17:52,046 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:52,047 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:52,048 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:52,049 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:52,049 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:52,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:52,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:52,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:52,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:52,050 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 19:17:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:52,240 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 19:17:52,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:52,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:52,241 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:52,241 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:52,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2019-12-27 19:17:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:52,244 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:52,244 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:52,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:52,245 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:52,245 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:52,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:52,445 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:52,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:52,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1060458038, now seen corresponding path program 104 times [2019-12-27 19:17:52,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:52,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699660271] [2019-12-27 19:17:52,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:52,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699660271] [2019-12-27 19:17:52,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172208296] [2019-12-27 19:17:52,519 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:52,559 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:52,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:52,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:52,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:52,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:52,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:52,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1441755023] [2019-12-27 19:17:52,651 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:52,652 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:52,654 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:52,654 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:52,654 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:52,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:52,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:52,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:52,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:52,655 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:52,852 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 19:17:52,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:52,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:52,854 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:52,854 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:52,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 114. [2019-12-27 19:17:52,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:52,857 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:52,857 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:52,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:52,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:52,858 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:53,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:53,059 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:53,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1060460828, now seen corresponding path program 105 times [2019-12-27 19:17:53,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:53,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398228700] [2019-12-27 19:17:53,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:53,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398228700] [2019-12-27 19:17:53,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743102367] [2019-12-27 19:17:53,131 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:53,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:17:53,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:53,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:53,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:53,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:53,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:53,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [338381956] [2019-12-27 19:17:53,286 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:53,287 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:53,289 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:53,289 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:53,289 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:53,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:53,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:53,290 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:53,505 INFO L93 Difference]: Finished difference Result 150 states and 316 transitions. [2019-12-27 19:17:53,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:53,506 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:53,506 INFO L225 Difference]: With dead ends: 150 [2019-12-27 19:17:53,506 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 19:17:53,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 19:17:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 115. [2019-12-27 19:17:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:53,510 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:53,510 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:53,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:53,511 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:53,511 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:53,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:53,711 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:53,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:53,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1060460921, now seen corresponding path program 106 times [2019-12-27 19:17:53,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:53,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271408459] [2019-12-27 19:17:53,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:53,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271408459] [2019-12-27 19:17:53,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118053847] [2019-12-27 19:17:53,780 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:53,821 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:17:53,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:53,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:53,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:53,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:53,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:53,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [352995806] [2019-12-27 19:17:53,911 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:53,912 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:53,913 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:53,913 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:53,914 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:53,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:53,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:53,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:53,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:53,914 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:54,091 INFO L93 Difference]: Finished difference Result 154 states and 323 transitions. [2019-12-27 19:17:54,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:54,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:54,092 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:17:54,092 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:17:54,092 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:17:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2019-12-27 19:17:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:17:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 247 transitions. [2019-12-27 19:17:54,095 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 247 transitions. Word has length 13 [2019-12-27 19:17:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:54,095 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 247 transitions. [2019-12-27 19:17:54,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 247 transitions. [2019-12-27 19:17:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:54,096 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:54,096 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:54,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:54,296 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:54,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1063139135, now seen corresponding path program 107 times [2019-12-27 19:17:54,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:54,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61121145] [2019-12-27 19:17:54,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:54,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61121145] [2019-12-27 19:17:54,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643586458] [2019-12-27 19:17:54,364 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:54,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:17:54,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:54,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:54,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:54,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:54,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:54,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1489233560] [2019-12-27 19:17:54,518 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:54,519 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:54,520 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:54,520 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:54,521 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:54,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:54,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:54,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:54,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:54,521 INFO L87 Difference]: Start difference. First operand 112 states and 247 transitions. Second operand 9 states. [2019-12-27 19:17:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:54,699 INFO L93 Difference]: Finished difference Result 147 states and 310 transitions. [2019-12-27 19:17:54,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:17:54,700 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:54,701 INFO L225 Difference]: With dead ends: 147 [2019-12-27 19:17:54,701 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 19:17:54,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:17:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 19:17:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 115. [2019-12-27 19:17:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:54,704 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:54,704 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:54,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:54,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:54,705 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:54,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:54,905 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:54,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:54,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1063139228, now seen corresponding path program 108 times [2019-12-27 19:17:54,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:54,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457420372] [2019-12-27 19:17:54,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:54,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457420372] [2019-12-27 19:17:54,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010705666] [2019-12-27 19:17:54,996 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:55,037 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:17:55,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:55,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:55,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:55,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:55,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:55,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1528579545] [2019-12-27 19:17:55,427 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:55,428 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:55,430 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:55,430 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:55,431 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:55,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:55,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:55,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:55,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:17:55,431 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:17:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:55,823 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 19:17:55,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:55,823 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:55,824 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:17:55,824 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:17:55,824 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:17:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:17:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2019-12-27 19:17:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:17:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:17:55,828 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:17:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:55,828 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:17:55,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:17:55,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:55,828 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:55,829 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:56,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:56,032 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:56,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1063142018, now seen corresponding path program 109 times [2019-12-27 19:17:56,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:56,032 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016933575] [2019-12-27 19:17:56,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:56,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016933575] [2019-12-27 19:17:56,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191652659] [2019-12-27 19:17:56,100 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:56,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:56,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:58,006 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 19:17:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:58,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:58,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:58,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [950378691] [2019-12-27 19:17:58,044 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:58,044 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:58,046 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:58,046 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:58,046 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:58,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:58,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:58,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:58,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=176, Unknown=2, NotChecked=0, Total=240 [2019-12-27 19:17:58,047 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:17:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:17:58,781 INFO L93 Difference]: Finished difference Result 152 states and 321 transitions. [2019-12-27 19:17:58,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:17:58,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:17:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:17:58,782 INFO L225 Difference]: With dead ends: 152 [2019-12-27 19:17:58,783 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 19:17:58,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=144, Invalid=359, Unknown=3, NotChecked=0, Total=506 [2019-12-27 19:17:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 19:17:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2019-12-27 19:17:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:17:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:17:58,786 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:17:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:17:58,787 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:17:58,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:17:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:17:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:17:58,787 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:17:58,787 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:17:58,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:58,988 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:17:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:17:58,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1063142111, now seen corresponding path program 110 times [2019-12-27 19:17:58,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:17:58,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408420765] [2019-12-27 19:17:58,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:17:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:17:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:17:59,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408420765] [2019-12-27 19:17:59,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523385311] [2019-12-27 19:17:59,066 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:17:59,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:17:59,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:17:59,108 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:17:59,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:17:59,574 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_329 Int)) (and (<= c_~j~0 (+ v_~i~0_329 2)) (<= (div (+ (* v_~i~0_329 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ c_~j~0 v_~i~0_329)))) is different from true [2019-12-27 19:17:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 19:17:59,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:17:59,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:17:59,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [403022662] [2019-12-27 19:17:59,838 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:17:59,839 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:17:59,840 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:17:59,840 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:17:59,841 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:17:59,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:17:59,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:17:59,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:17:59,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=156, Unknown=1, NotChecked=26, Total=240 [2019-12-27 19:17:59,841 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:18:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:00,866 INFO L93 Difference]: Finished difference Result 156 states and 328 transitions. [2019-12-27 19:18:00,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:00,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:00,867 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:18:00,867 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:18:00,868 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=140, Invalid=324, Unknown=2, NotChecked=40, Total=506 [2019-12-27 19:18:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:18:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2019-12-27 19:18:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 19:18:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 251 transitions. [2019-12-27 19:18:00,871 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 251 transitions. Word has length 13 [2019-12-27 19:18:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:00,872 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 251 transitions. [2019-12-27 19:18:00,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 251 transitions. [2019-12-27 19:18:00,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:00,872 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:00,872 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:01,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:01,076 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:01,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1063228508, now seen corresponding path program 111 times [2019-12-27 19:18:01,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:01,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431090] [2019-12-27 19:18:01,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:01,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431090] [2019-12-27 19:18:01,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374152007] [2019-12-27 19:18:01,147 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:01,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:18:01,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:01,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:18:01,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:01,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:01,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:18:01,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [924712681] [2019-12-27 19:18:01,307 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:01,308 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:01,310 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:18:01,311 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:01,311 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:18:01,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:18:01,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:01,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:18:01,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:18:01,312 INFO L87 Difference]: Start difference. First operand 113 states and 251 transitions. Second operand 9 states. [2019-12-27 19:18:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:01,495 INFO L93 Difference]: Finished difference Result 148 states and 311 transitions. [2019-12-27 19:18:01,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:18:01,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:01,496 INFO L225 Difference]: With dead ends: 148 [2019-12-27 19:18:01,496 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 19:18:01,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:18:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 19:18:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2019-12-27 19:18:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:18:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:18:01,499 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:18:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:01,499 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:18:01,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:18:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:01,500 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:01,500 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:01,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:01,701 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:01,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1063228601, now seen corresponding path program 112 times [2019-12-27 19:18:01,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:01,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288323835] [2019-12-27 19:18:01,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:01,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288323835] [2019-12-27 19:18:01,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514535313] [2019-12-27 19:18:01,774 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:01,817 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:18:01,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:01,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:18:01,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:02,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:02,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:18:02,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [621533909] [2019-12-27 19:18:02,843 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:02,844 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:02,845 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:18:02,845 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:02,846 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:18:02,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:18:02,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:18:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:18:02,846 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:18:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:03,500 INFO L93 Difference]: Finished difference Result 154 states and 323 transitions. [2019-12-27 19:18:03,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:18:03,501 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:03,502 INFO L225 Difference]: With dead ends: 154 [2019-12-27 19:18:03,502 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 19:18:03,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=154, Invalid=397, Unknown=1, NotChecked=0, Total=552 [2019-12-27 19:18:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 19:18:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 114. [2019-12-27 19:18:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 19:18:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 255 transitions. [2019-12-27 19:18:03,505 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 255 transitions. Word has length 13 [2019-12-27 19:18:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:03,506 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 255 transitions. [2019-12-27 19:18:03,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 255 transitions. [2019-12-27 19:18:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:03,506 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:03,506 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:03,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:03,708 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:03,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1063231391, now seen corresponding path program 113 times [2019-12-27 19:18:03,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:03,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182533201] [2019-12-27 19:18:03,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:03,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182533201] [2019-12-27 19:18:03,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059479455] [2019-12-27 19:18:03,780 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:03,826 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:18:03,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:03,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:18:03,827 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:03,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:03,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:18:03,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [18130170] [2019-12-27 19:18:03,925 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:03,926 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:03,927 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:18:03,927 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:03,927 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:18:03,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:18:03,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:03,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:18:03,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:18:03,928 INFO L87 Difference]: Start difference. First operand 114 states and 255 transitions. Second operand 9 states. [2019-12-27 19:18:04,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:04,121 INFO L93 Difference]: Finished difference Result 144 states and 301 transitions. [2019-12-27 19:18:04,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:18:04,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:04,122 INFO L225 Difference]: With dead ends: 144 [2019-12-27 19:18:04,122 INFO L226 Difference]: Without dead ends: 143 [2019-12-27 19:18:04,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:18:04,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-27 19:18:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2019-12-27 19:18:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 19:18:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 259 transitions. [2019-12-27 19:18:04,126 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 259 transitions. Word has length 13 [2019-12-27 19:18:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:04,126 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 259 transitions. [2019-12-27 19:18:04,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 259 transitions. [2019-12-27 19:18:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:04,127 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:04,127 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:04,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:04,330 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1063231484, now seen corresponding path program 114 times [2019-12-27 19:18:04,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:04,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302032587] [2019-12-27 19:18:04,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:04,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302032587] [2019-12-27 19:18:04,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621455126] [2019-12-27 19:18:04,402 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:04,444 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:18:04,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:04,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:18:04,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:04,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:04,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 19:18:04,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [627238833] [2019-12-27 19:18:04,547 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:04,548 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:04,551 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:18:04,551 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:04,551 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:18:04,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:18:04,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:04,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:18:04,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:18:04,552 INFO L87 Difference]: Start difference. First operand 115 states and 259 transitions. Second operand 9 states. [2019-12-27 19:18:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:04,715 INFO L93 Difference]: Finished difference Result 137 states and 285 transitions. [2019-12-27 19:18:04,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:18:04,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:18:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:04,716 INFO L225 Difference]: With dead ends: 137 [2019-12-27 19:18:04,716 INFO L226 Difference]: Without dead ends: 136 [2019-12-27 19:18:04,716 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:18:04,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-12-27 19:18:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2019-12-27 19:18:04,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 19:18:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2019-12-27 19:18:04,719 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 13 [2019-12-27 19:18:04,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:04,719 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2019-12-27 19:18:04,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:18:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2019-12-27 19:18:04,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:18:04,720 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:04,720 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:04,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:04,921 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1765472381, now seen corresponding path program 7 times [2019-12-27 19:18:04,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:04,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003293993] [2019-12-27 19:18:04,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:04,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003293993] [2019-12-27 19:18:04,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397492085] [2019-12-27 19:18:04,994 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:05,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:05,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:05,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:05,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:05,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [100288346] [2019-12-27 19:18:05,154 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:05,155 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:05,157 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 13 transitions. [2019-12-27 19:18:05,157 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:05,157 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:05,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:05,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:05,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:05,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:05,157 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand 10 states. [2019-12-27 19:18:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:05,348 INFO L93 Difference]: Finished difference Result 135 states and 288 transitions. [2019-12-27 19:18:05,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:05,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-27 19:18:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:05,350 INFO L225 Difference]: With dead ends: 135 [2019-12-27 19:18:05,350 INFO L226 Difference]: Without dead ends: 134 [2019-12-27 19:18:05,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-12-27 19:18:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2019-12-27 19:18:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 19:18:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2019-12-27 19:18:05,354 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 13 [2019-12-27 19:18:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:05,354 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2019-12-27 19:18:05,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2019-12-27 19:18:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:05,355 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:05,355 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:05,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:05,558 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:05,559 INFO L82 PathProgramCache]: Analyzing trace with hash 689055580, now seen corresponding path program 8 times [2019-12-27 19:18:05,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:05,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158556545] [2019-12-27 19:18:05,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:05,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158556545] [2019-12-27 19:18:05,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147138672] [2019-12-27 19:18:05,652 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:05,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:18:05,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:05,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 19:18:05,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:05,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:05,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 19:18:05,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1532802190] [2019-12-27 19:18:05,866 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:05,868 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:05,870 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 19:18:05,871 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:05,871 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:05,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:18:05,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:05,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:18:05,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:18:05,871 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand 11 states. [2019-12-27 19:18:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:06,108 INFO L93 Difference]: Finished difference Result 146 states and 308 transitions. [2019-12-27 19:18:06,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:18:06,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 19:18:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:06,109 INFO L225 Difference]: With dead ends: 146 [2019-12-27 19:18:06,109 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 19:18:06,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:18:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 19:18:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2019-12-27 19:18:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:06,112 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:06,112 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:06,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:18:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:06,113 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:06,113 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:06,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:06,314 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:06,315 INFO L82 PathProgramCache]: Analyzing trace with hash 663066358, now seen corresponding path program 115 times [2019-12-27 19:18:06,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:06,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565542701] [2019-12-27 19:18:06,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:06,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565542701] [2019-12-27 19:18:06,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705682827] [2019-12-27 19:18:06,393 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:06,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:06,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:06,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:06,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:06,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1248331064] [2019-12-27 19:18:06,597 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:06,598 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:06,602 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 56 transitions. [2019-12-27 19:18:06,602 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:06,603 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:06,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:06,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:06,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:06,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:06,604 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:06,936 INFO L93 Difference]: Finished difference Result 156 states and 333 transitions. [2019-12-27 19:18:06,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:06,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:06,938 INFO L225 Difference]: With dead ends: 156 [2019-12-27 19:18:06,938 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 19:18:06,938 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 19:18:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 124. [2019-12-27 19:18:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:06,942 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:06,942 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:06,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:06,943 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:06,943 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:07,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:07,147 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:07,148 INFO L82 PathProgramCache]: Analyzing trace with hash -117422285, now seen corresponding path program 116 times [2019-12-27 19:18:07,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:07,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908725078] [2019-12-27 19:18:07,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:07,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908725078] [2019-12-27 19:18:07,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558405280] [2019-12-27 19:18:07,280 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:07,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:18:07,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:07,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:07,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:07,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:07,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:07,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [451649939] [2019-12-27 19:18:07,572 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:07,573 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:07,577 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 19:18:07,577 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:07,577 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:07,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:07,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:07,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:07,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:07,578 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:07,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:07,819 INFO L93 Difference]: Finished difference Result 167 states and 356 transitions. [2019-12-27 19:18:07,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:07,819 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:07,820 INFO L225 Difference]: With dead ends: 167 [2019-12-27 19:18:07,820 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 19:18:07,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:07,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 19:18:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2019-12-27 19:18:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:07,823 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:07,823 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:07,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:07,824 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:07,824 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:08,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:08,025 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:08,025 INFO L82 PathProgramCache]: Analyzing trace with hash -117422192, now seen corresponding path program 117 times [2019-12-27 19:18:08,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:08,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847495793] [2019-12-27 19:18:08,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:08,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847495793] [2019-12-27 19:18:08,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813372718] [2019-12-27 19:18:08,124 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:08,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:18:08,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:08,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:08,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:08,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:08,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:08,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1965472919] [2019-12-27 19:18:08,322 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:08,323 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:08,327 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 19:18:08,327 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:08,327 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:08,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:08,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:08,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:08,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:08,328 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:08,589 INFO L93 Difference]: Finished difference Result 167 states and 356 transitions. [2019-12-27 19:18:08,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:08,589 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:08,590 INFO L225 Difference]: With dead ends: 167 [2019-12-27 19:18:08,591 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 19:18:08,591 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 19:18:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2019-12-27 19:18:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:08,595 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:08,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:08,595 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:08,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:08,595 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:08,596 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:08,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:08,796 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:08,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233558, now seen corresponding path program 118 times [2019-12-27 19:18:08,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:08,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148004277] [2019-12-27 19:18:08,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:08,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148004277] [2019-12-27 19:18:08,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336805181] [2019-12-27 19:18:08,902 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:08,949 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:18:08,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:08,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:08,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:09,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:09,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:09,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1668678910] [2019-12-27 19:18:09,080 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:09,081 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:09,084 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 19:18:09,084 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:09,084 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:09,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:09,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:09,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:09,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:09,085 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:09,316 INFO L93 Difference]: Finished difference Result 173 states and 368 transitions. [2019-12-27 19:18:09,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:09,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:09,318 INFO L225 Difference]: With dead ends: 173 [2019-12-27 19:18:09,318 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:18:09,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:18:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 19:18:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:09,320 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:09,321 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:09,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:09,321 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:09,321 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:09,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:09,522 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:09,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1457233651, now seen corresponding path program 119 times [2019-12-27 19:18:09,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:09,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109612845] [2019-12-27 19:18:09,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:09,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109612845] [2019-12-27 19:18:09,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983582312] [2019-12-27 19:18:09,612 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:09,653 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:18:09,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:09,654 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:09,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:09,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:09,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:09,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [192502436] [2019-12-27 19:18:09,797 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:09,798 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:09,800 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 19:18:09,800 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:09,800 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:09,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:09,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:09,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:09,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:09,801 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:10,078 INFO L93 Difference]: Finished difference Result 173 states and 371 transitions. [2019-12-27 19:18:10,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:10,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:10,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:10,079 INFO L225 Difference]: With dead ends: 173 [2019-12-27 19:18:10,079 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:18:10,080 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:18:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-12-27 19:18:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:18:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:18:10,083 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:18:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:10,083 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:18:10,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:10,083 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:18:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:10,084 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:10,084 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:10,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:10,285 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:10,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236441, now seen corresponding path program 120 times [2019-12-27 19:18:10,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:10,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913338761] [2019-12-27 19:18:10,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:10,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913338761] [2019-12-27 19:18:10,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390195251] [2019-12-27 19:18:10,369 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:10,411 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:18:10,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:10,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:10,413 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:12,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:12,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:12,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [76114973] [2019-12-27 19:18:12,000 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:12,001 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:12,004 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 19:18:12,004 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:12,004 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:12,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:12,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=229, Unknown=3, NotChecked=0, Total=306 [2019-12-27 19:18:12,005 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:18:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:12,733 INFO L93 Difference]: Finished difference Result 174 states and 372 transitions. [2019-12-27 19:18:12,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:12,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:12,734 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:18:12,734 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:18:12,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=170, Invalid=427, Unknown=3, NotChecked=0, Total=600 [2019-12-27 19:18:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:18:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2019-12-27 19:18:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:18:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:18:12,738 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:18:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:12,738 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:18:12,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:18:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:12,739 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:12,739 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:12,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:12,940 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:12,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1457236534, now seen corresponding path program 121 times [2019-12-27 19:18:12,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:12,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415561386] [2019-12-27 19:18:12,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:13,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415561386] [2019-12-27 19:18:13,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457180621] [2019-12-27 19:18:13,021 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:13,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:13,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:14,850 WARN L192 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 19:18:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:14,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:14,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:14,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [691356685] [2019-12-27 19:18:14,851 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:14,852 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:14,855 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 19:18:14,855 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:14,855 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:14,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:14,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:14,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:14,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:18:14,856 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:18:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:15,266 INFO L93 Difference]: Finished difference Result 173 states and 371 transitions. [2019-12-27 19:18:15,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:15,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:15,268 INFO L225 Difference]: With dead ends: 173 [2019-12-27 19:18:15,268 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:18:15,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=174, Invalid=425, Unknown=1, NotChecked=0, Total=600 [2019-12-27 19:18:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:18:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 19:18:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:15,271 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:15,271 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:15,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:15,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:15,272 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:15,272 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:15,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:15,472 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:15,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:15,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042861, now seen corresponding path program 122 times [2019-12-27 19:18:15,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:15,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727886649] [2019-12-27 19:18:15,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:15,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727886649] [2019-12-27 19:18:15,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875957772] [2019-12-27 19:18:15,554 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:15,597 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:18:15,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:15,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:15,598 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:15,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:15,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:15,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [728310419] [2019-12-27 19:18:15,736 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:15,738 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:15,740 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:15,740 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:15,741 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:15,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:15,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:15,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:15,741 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:15,971 INFO L93 Difference]: Finished difference Result 173 states and 368 transitions. [2019-12-27 19:18:15,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:15,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:15,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:15,973 INFO L225 Difference]: With dead ends: 173 [2019-12-27 19:18:15,973 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:18:15,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:18:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:18:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 19:18:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:18:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:18:15,976 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:18:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:15,976 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:18:15,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:18:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:15,977 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:15,977 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:16,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:16,180 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:16,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1268042768, now seen corresponding path program 123 times [2019-12-27 19:18:16,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:16,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023744] [2019-12-27 19:18:16,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:16,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023744] [2019-12-27 19:18:16,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385277306] [2019-12-27 19:18:16,267 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:16,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:18:16,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:16,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:16,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:16,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:16,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:16,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1853992468] [2019-12-27 19:18:16,825 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:16,826 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:16,828 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:16,829 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:16,829 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:16,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:16,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:16,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:16,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:18:16,829 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:18:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:17,803 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 19:18:17,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:17,803 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:17,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:17,804 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:18:17,804 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:18:17,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=170, Invalid=429, Unknown=1, NotChecked=0, Total=600 [2019-12-27 19:18:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:18:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2019-12-27 19:18:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:18:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:18:17,807 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:18:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:17,808 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:18:17,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:18:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:17,808 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:17,808 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:18,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:18,009 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039978, now seen corresponding path program 124 times [2019-12-27 19:18:18,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:18,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909697047] [2019-12-27 19:18:18,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:18,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909697047] [2019-12-27 19:18:18,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858798209] [2019-12-27 19:18:18,095 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:18,134 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:18:18,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:18,135 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:18,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:22,109 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 19:18:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:22,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:22,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:22,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2096683] [2019-12-27 19:18:22,110 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:22,111 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:22,113 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:22,113 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:22,113 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:22,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:22,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:22,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:22,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-12-27 19:18:22,114 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:18:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:23,514 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2019-12-27 19:18:23,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:18:23,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:23,516 INFO L225 Difference]: With dead ends: 179 [2019-12-27 19:18:23,516 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 19:18:23,516 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=183, Invalid=463, Unknown=4, NotChecked=0, Total=650 [2019-12-27 19:18:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 19:18:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2019-12-27 19:18:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:18:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:18:23,519 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:18:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:23,520 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:18:23,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:18:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:23,520 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:23,520 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:23,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:23,721 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:23,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1268039885, now seen corresponding path program 125 times [2019-12-27 19:18:23,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:23,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705124301] [2019-12-27 19:18:23,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:23,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705124301] [2019-12-27 19:18:23,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251085864] [2019-12-27 19:18:23,812 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:23,861 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:18:23,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:23,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:23,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:24,370 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_406 Int)) (and (<= c_~j~0 (+ (* 2 v_~i~0_406) 1)) (<= c_~i~0 (+ c_~j~0 v_~i~0_406)) (<= (div (+ (* v_~i~0_406 (- 1)) 1) (- 3)) 1))) is different from true [2019-12-27 19:18:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2019-12-27 19:18:25,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:25,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:25,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562492243] [2019-12-27 19:18:25,251 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:25,252 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:25,254 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:25,254 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:25,254 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:25,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:25,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:25,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=205, Unknown=2, NotChecked=30, Total=306 [2019-12-27 19:18:25,255 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:18:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:26,002 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2019-12-27 19:18:26,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:26,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:26,004 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:18:26,004 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:18:26,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=166, Invalid=387, Unknown=3, NotChecked=44, Total=600 [2019-12-27 19:18:26,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:18:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 125. [2019-12-27 19:18:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:18:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:18:26,006 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:18:26,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:26,006 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:18:26,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:26,007 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:18:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:26,007 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:26,007 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:26,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:26,208 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:26,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953488, now seen corresponding path program 126 times [2019-12-27 19:18:26,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:26,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114541862] [2019-12-27 19:18:26,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:26,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114541862] [2019-12-27 19:18:26,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240364259] [2019-12-27 19:18:26,295 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:26,340 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:18:26,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:26,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:26,342 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:29,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:29,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:29,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1626437233] [2019-12-27 19:18:29,912 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:29,913 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:29,916 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:29,916 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:29,916 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:29,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:29,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:29,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2019-12-27 19:18:29,917 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:18:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:35,076 INFO L93 Difference]: Finished difference Result 177 states and 378 transitions. [2019-12-27 19:18:35,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:35,077 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:35,078 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:18:35,078 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:18:35,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=169, Invalid=419, Unknown=12, NotChecked=0, Total=600 [2019-12-27 19:18:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:18:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 125. [2019-12-27 19:18:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:18:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:18:35,081 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:18:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:35,081 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:18:35,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:18:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:35,082 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:35,082 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:35,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:35,285 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:35,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1267953395, now seen corresponding path program 127 times [2019-12-27 19:18:35,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:35,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490576496] [2019-12-27 19:18:35,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:35,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490576496] [2019-12-27 19:18:35,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924786571] [2019-12-27 19:18:35,374 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:35,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:35,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:37,334 WARN L192 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 19:18:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:38,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:38,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:38,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [89706149] [2019-12-27 19:18:38,309 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:38,310 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:38,313 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:38,313 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:38,313 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:38,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:38,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:38,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:38,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=227, Unknown=2, NotChecked=0, Total=306 [2019-12-27 19:18:38,314 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:18:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:42,421 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 19:18:42,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:42,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:42,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:42,422 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:18:42,422 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:18:42,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=171, Invalid=423, Unknown=6, NotChecked=0, Total=600 [2019-12-27 19:18:42,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:18:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-27 19:18:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:18:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:18:42,425 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:18:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:42,426 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:18:42,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:18:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:42,426 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:42,426 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:42,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:42,627 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:42,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:42,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1267950605, now seen corresponding path program 128 times [2019-12-27 19:18:42,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:42,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420722550] [2019-12-27 19:18:42,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:42,711 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420722550] [2019-12-27 19:18:42,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639786426] [2019-12-27 19:18:42,712 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:42,755 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:18:42,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:42,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:42,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:50,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:50,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:50,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [830545413] [2019-12-27 19:18:50,553 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:50,554 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:50,557 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:50,558 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:50,558 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:50,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:50,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:50,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=227, Unknown=4, NotChecked=0, Total=306 [2019-12-27 19:18:50,559 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:18:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:18:57,177 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 19:18:57,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:18:57,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:18:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:18:57,178 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:18:57,179 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:18:57,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=167, Invalid=426, Unknown=7, NotChecked=0, Total=600 [2019-12-27 19:18:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:18:57,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-27 19:18:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:18:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:18:57,182 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:18:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:18:57,183 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:18:57,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:18:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:18:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:18:57,183 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:18:57,183 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:18:57,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:57,387 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:18:57,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:18:57,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1267950512, now seen corresponding path program 129 times [2019-12-27 19:18:57,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:18:57,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494082136] [2019-12-27 19:18:57,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:18:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:18:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:57,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494082136] [2019-12-27 19:18:57,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783172558] [2019-12-27 19:18:57,472 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:18:57,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:18:57,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:18:57,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:18:57,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:18:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:18:59,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:18:59,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:18:59,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1659415168] [2019-12-27 19:18:59,801 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:18:59,801 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:18:59,804 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 19:18:59,805 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:18:59,805 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:18:59,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:18:59,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:18:59,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:18:59,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=227, Unknown=4, NotChecked=0, Total=306 [2019-12-27 19:18:59,805 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:19:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:00,496 INFO L93 Difference]: Finished difference Result 173 states and 374 transitions. [2019-12-27 19:19:00,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:00,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:00,497 INFO L225 Difference]: With dead ends: 173 [2019-12-27 19:19:00,497 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 19:19:00,498 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=173, Invalid=422, Unknown=5, NotChecked=0, Total=600 [2019-12-27 19:19:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 19:19:00,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2019-12-27 19:19:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:19:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:19:00,501 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:19:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:00,501 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:19:00,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:19:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:00,502 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:00,502 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:00,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:00,703 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:00,703 INFO L82 PathProgramCache]: Analyzing trace with hash 147734070, now seen corresponding path program 130 times [2019-12-27 19:19:00,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:00,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111647553] [2019-12-27 19:19:00,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:00,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111647553] [2019-12-27 19:19:00,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435744043] [2019-12-27 19:19:00,782 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:00,825 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:19:00,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:00,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:00,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:00,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:00,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:00,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [933929582] [2019-12-27 19:19:00,969 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:00,970 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:00,972 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:00,972 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:00,973 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:00,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:00,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:00,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:00,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:00,973 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:19:01,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:01,196 INFO L93 Difference]: Finished difference Result 168 states and 357 transitions. [2019-12-27 19:19:01,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:01,197 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:01,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:01,198 INFO L225 Difference]: With dead ends: 168 [2019-12-27 19:19:01,198 INFO L226 Difference]: Without dead ends: 167 [2019-12-27 19:19:01,198 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-27 19:19:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2019-12-27 19:19:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:19:01,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:19:01,202 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:19:01,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:01,202 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:19:01,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:19:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:01,203 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:01,203 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:01,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:01,406 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:01,406 INFO L82 PathProgramCache]: Analyzing trace with hash 147734163, now seen corresponding path program 131 times [2019-12-27 19:19:01,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:01,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535558456] [2019-12-27 19:19:01,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:01,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535558456] [2019-12-27 19:19:01,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510875244] [2019-12-27 19:19:01,488 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:01,532 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:19:01,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:01,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:01,534 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:01,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:01,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:01,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1804272551] [2019-12-27 19:19:01,701 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:01,702 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:01,705 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:01,705 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:01,705 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:01,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:01,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:01,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:01,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:01,706 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:19:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:02,001 INFO L93 Difference]: Finished difference Result 172 states and 370 transitions. [2019-12-27 19:19:02,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:02,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:02,003 INFO L225 Difference]: With dead ends: 172 [2019-12-27 19:19:02,003 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 19:19:02,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 19:19:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 127. [2019-12-27 19:19:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:02,006 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:02,006 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:02,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:02,007 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:02,007 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:02,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:02,208 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:02,208 INFO L82 PathProgramCache]: Analyzing trace with hash 147736953, now seen corresponding path program 132 times [2019-12-27 19:19:02,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:02,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848626165] [2019-12-27 19:19:02,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:02,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848626165] [2019-12-27 19:19:02,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016988256] [2019-12-27 19:19:02,294 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:02,337 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:19:02,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:02,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:02,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:02,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:02,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:02,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1236857686] [2019-12-27 19:19:02,528 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:02,529 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:02,531 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:02,531 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:02,531 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:02,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:02,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:02,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:02,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:02,532 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:02,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:02,899 INFO L93 Difference]: Finished difference Result 180 states and 384 transitions. [2019-12-27 19:19:02,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:19:02,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:02,901 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:19:02,901 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:19:02,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:19:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:19:02,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2019-12-27 19:19:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:02,904 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:02,904 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:02,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:02,904 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:02,904 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:03,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:03,105 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash 147737046, now seen corresponding path program 133 times [2019-12-27 19:19:03,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:03,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894497436] [2019-12-27 19:19:03,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:03,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894497436] [2019-12-27 19:19:03,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849889197] [2019-12-27 19:19:03,194 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:03,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:03,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:03,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:03,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:03,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [480061508] [2019-12-27 19:19:03,407 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:03,409 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:03,412 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:03,412 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:03,412 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:03,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:03,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:03,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:03,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:03,413 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:03,716 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2019-12-27 19:19:03,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:03,717 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:03,718 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:19:03,718 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:19:03,718 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:19:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 126. [2019-12-27 19:19:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:19:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:19:03,721 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:19:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:03,721 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:19:03,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:19:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:03,722 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:03,722 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:03,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:03,923 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:03,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:03,923 INFO L82 PathProgramCache]: Analyzing trace with hash 147823443, now seen corresponding path program 134 times [2019-12-27 19:19:03,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:03,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075554848] [2019-12-27 19:19:03,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:04,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075554848] [2019-12-27 19:19:04,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808003568] [2019-12-27 19:19:04,010 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:04,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:19:04,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:04,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:04,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:04,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:04,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:04,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1294568315] [2019-12-27 19:19:04,366 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:04,369 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:04,373 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:04,373 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:04,373 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:04,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:04,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:04,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:04,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:04,375 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:19:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:04,904 INFO L93 Difference]: Finished difference Result 180 states and 384 transitions. [2019-12-27 19:19:04,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:19:04,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:04,906 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:19:04,906 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:19:04,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:19:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:19:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 126. [2019-12-27 19:19:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:19:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:19:04,910 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:19:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:04,911 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:19:04,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:04,911 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:19:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:04,912 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:04,912 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:05,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:05,116 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:05,116 INFO L82 PathProgramCache]: Analyzing trace with hash 147823536, now seen corresponding path program 135 times [2019-12-27 19:19:05,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:05,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614291259] [2019-12-27 19:19:05,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:05,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614291259] [2019-12-27 19:19:05,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738799221] [2019-12-27 19:19:05,219 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:05,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:19:05,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:05,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:05,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:05,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:05,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:05,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2060309964] [2019-12-27 19:19:05,479 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:05,480 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:05,482 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:05,482 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:05,482 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:05,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:05,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:05,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:05,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:05,483 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:19:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:05,829 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:19:05,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:19:05,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:05,831 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:19:05,831 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:19:05,831 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:19:05,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:19:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2019-12-27 19:19:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:05,834 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:05,834 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:05,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:05,835 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:05,835 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:06,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:06,038 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:06,038 INFO L82 PathProgramCache]: Analyzing trace with hash 147826326, now seen corresponding path program 136 times [2019-12-27 19:19:06,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:06,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970500233] [2019-12-27 19:19:06,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:06,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970500233] [2019-12-27 19:19:06,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7690243] [2019-12-27 19:19:06,120 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:06,163 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:19:06,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:06,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:06,164 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:10,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:10,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:10,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [478455023] [2019-12-27 19:19:10,547 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:10,548 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:10,551 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:10,551 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:10,551 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:10,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:10,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:10,552 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:14,962 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:19:14,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:19:14,963 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:14,963 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:19:14,964 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:19:14,964 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=176, Invalid=472, Unknown=2, NotChecked=0, Total=650 [2019-12-27 19:19:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:19:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2019-12-27 19:19:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:14,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:14,966 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:14,967 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:14,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:14,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:14,967 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:14,967 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:15,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:15,168 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash 147826419, now seen corresponding path program 137 times [2019-12-27 19:19:15,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:15,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521959935] [2019-12-27 19:19:15,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:15,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521959935] [2019-12-27 19:19:15,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578149423] [2019-12-27 19:19:15,253 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:15,290 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:19:15,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:15,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:15,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:15,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:15,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:15,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1453501761] [2019-12-27 19:19:15,521 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:15,522 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:15,524 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:15,524 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:15,524 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:15,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:15,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:15,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:15,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:15,525 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:16,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:16,139 INFO L93 Difference]: Finished difference Result 176 states and 380 transitions. [2019-12-27 19:19:16,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:16,140 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:16,141 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:19:16,141 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:19:16,141 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:19:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 125. [2019-12-27 19:19:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:19:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:19:16,145 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:19:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:16,145 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:19:16,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:19:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:16,146 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:16,146 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:16,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:16,349 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:16,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:16,350 INFO L82 PathProgramCache]: Analyzing trace with hash 150504633, now seen corresponding path program 138 times [2019-12-27 19:19:16,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:16,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551866853] [2019-12-27 19:19:16,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:16,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551866853] [2019-12-27 19:19:16,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262032833] [2019-12-27 19:19:16,433 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:16,473 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:19:16,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:16,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:16,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:16,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:16,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:16,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1651934582] [2019-12-27 19:19:16,695 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:16,696 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:16,699 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:16,699 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:16,699 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:16,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:16,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:16,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:16,700 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:19:17,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:17,026 INFO L93 Difference]: Finished difference Result 176 states and 374 transitions. [2019-12-27 19:19:17,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:17,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:17,027 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:19:17,028 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:19:17,028 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:17,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:19:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 125. [2019-12-27 19:19:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 19:19:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 286 transitions. [2019-12-27 19:19:17,030 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 286 transitions. Word has length 14 [2019-12-27 19:19:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:17,030 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 286 transitions. [2019-12-27 19:19:17,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 286 transitions. [2019-12-27 19:19:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:17,031 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:17,031 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:17,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:17,234 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:17,235 INFO L82 PathProgramCache]: Analyzing trace with hash 150504726, now seen corresponding path program 139 times [2019-12-27 19:19:17,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:17,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254278746] [2019-12-27 19:19:17,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:17,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254278746] [2019-12-27 19:19:17,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792360796] [2019-12-27 19:19:17,322 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:17,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:17,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:21,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:21,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:21,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1615301874] [2019-12-27 19:19:21,657 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:21,658 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:21,660 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:21,660 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:21,660 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:21,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:21,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:21,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:21,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:21,661 INFO L87 Difference]: Start difference. First operand 125 states and 286 transitions. Second operand 10 states. [2019-12-27 19:19:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:28,050 INFO L93 Difference]: Finished difference Result 179 states and 386 transitions. [2019-12-27 19:19:28,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:28,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:28,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:28,052 INFO L225 Difference]: With dead ends: 179 [2019-12-27 19:19:28,052 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 19:19:28,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=169, Invalid=428, Unknown=3, NotChecked=0, Total=600 [2019-12-27 19:19:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 19:19:28,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 127. [2019-12-27 19:19:28,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:28,055 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:28,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:28,055 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:28,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:28,056 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:28,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:28,056 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:28,056 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:28,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:28,257 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash 150507516, now seen corresponding path program 140 times [2019-12-27 19:19:28,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:28,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891209293] [2019-12-27 19:19:28,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:28,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891209293] [2019-12-27 19:19:28,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324409140] [2019-12-27 19:19:28,349 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:28,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:19:28,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:28,395 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:28,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:28,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:28,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:28,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [410971035] [2019-12-27 19:19:28,630 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:28,631 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:28,633 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:28,634 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:28,634 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:28,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:28,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:28,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:28,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:28,634 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:28,956 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 19:19:28,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:28,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:28,957 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:19:28,957 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:19:28,957 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:19:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-27 19:19:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:28,961 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:28,961 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:28,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:28,961 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:28,962 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:29,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:29,162 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:29,163 INFO L82 PathProgramCache]: Analyzing trace with hash 150507609, now seen corresponding path program 141 times [2019-12-27 19:19:29,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:29,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529574848] [2019-12-27 19:19:29,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:29,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529574848] [2019-12-27 19:19:29,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028443556] [2019-12-27 19:19:29,247 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:29,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:19:29,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:29,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:29,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:29,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:29,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:29,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [949918723] [2019-12-27 19:19:29,532 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:29,533 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:29,535 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:29,535 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:29,535 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:29,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:29,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:29,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:29,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:29,536 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:19:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:29,837 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 19:19:29,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:29,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:29,838 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:19:29,838 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:19:29,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:19:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:19:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2019-12-27 19:19:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:19:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:19:29,841 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:19:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:29,841 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:19:29,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:19:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:29,842 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:29,842 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:30,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:30,043 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:30,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:30,043 INFO L82 PathProgramCache]: Analyzing trace with hash 150594006, now seen corresponding path program 142 times [2019-12-27 19:19:30,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:30,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041970511] [2019-12-27 19:19:30,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:30,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041970511] [2019-12-27 19:19:30,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131530713] [2019-12-27 19:19:30,123 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:30,166 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:19:30,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:30,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:30,167 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:36,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:36,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:36,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [257772006] [2019-12-27 19:19:36,502 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:36,503 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:36,505 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:36,505 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:36,505 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:36,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:36,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:36,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:36,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:36,505 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:19:41,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:41,024 INFO L93 Difference]: Finished difference Result 178 states and 382 transitions. [2019-12-27 19:19:41,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:41,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:41,025 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:19:41,025 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:19:41,026 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=165, Invalid=433, Unknown=2, NotChecked=0, Total=600 [2019-12-27 19:19:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:19:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 126. [2019-12-27 19:19:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 19:19:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 290 transitions. [2019-12-27 19:19:41,029 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 290 transitions. Word has length 14 [2019-12-27 19:19:41,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:41,029 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 290 transitions. [2019-12-27 19:19:41,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 290 transitions. [2019-12-27 19:19:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:41,030 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:41,030 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:41,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:41,231 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:41,231 INFO L82 PathProgramCache]: Analyzing trace with hash 150594099, now seen corresponding path program 143 times [2019-12-27 19:19:41,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:41,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496750280] [2019-12-27 19:19:41,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:41,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496750280] [2019-12-27 19:19:41,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903129226] [2019-12-27 19:19:41,321 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:41,365 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:19:41,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:41,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:41,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:19:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:45,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:19:45,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:19:45,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [581187396] [2019-12-27 19:19:45,039 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:19:45,040 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:19:45,042 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:19:45,042 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:19:45,042 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:19:45,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:19:45,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:19:45,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:19:45,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:19:45,043 INFO L87 Difference]: Start difference. First operand 126 states and 290 transitions. Second operand 10 states. [2019-12-27 19:19:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:19:54,463 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 19:19:54,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:19:54,464 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:19:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:19:54,465 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:19:54,465 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:19:54,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=163, Invalid=430, Unknown=7, NotChecked=0, Total=600 [2019-12-27 19:19:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:19:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2019-12-27 19:19:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:19:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:19:54,469 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:19:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:19:54,469 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:19:54,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:19:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:19:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:19:54,469 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:19:54,470 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:19:54,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:54,673 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:19:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:19:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash 150596889, now seen corresponding path program 144 times [2019-12-27 19:19:54,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:19:54,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808028899] [2019-12-27 19:19:54,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:19:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:19:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:19:54,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808028899] [2019-12-27 19:19:54,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359006329] [2019-12-27 19:19:54,768 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:19:54,812 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:19:54,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:19:54,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:19:54,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:01,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:01,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:01,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1462962177] [2019-12-27 19:20:01,076 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:01,077 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:01,079 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:20:01,079 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:01,079 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:01,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:01,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:01,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:01,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:01,080 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:20:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:03,408 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2019-12-27 19:20:03,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:03,408 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:03,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:03,409 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:20:03,409 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:20:03,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=165, Invalid=434, Unknown=1, NotChecked=0, Total=600 [2019-12-27 19:20:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:20:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 127. [2019-12-27 19:20:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:20:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 294 transitions. [2019-12-27 19:20:03,412 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 294 transitions. Word has length 14 [2019-12-27 19:20:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:03,413 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 294 transitions. [2019-12-27 19:20:03,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 294 transitions. [2019-12-27 19:20:03,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:03,413 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:03,413 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:03,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:03,614 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:03,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:03,614 INFO L82 PathProgramCache]: Analyzing trace with hash 150596982, now seen corresponding path program 145 times [2019-12-27 19:20:03,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:03,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980985879] [2019-12-27 19:20:03,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:03,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980985879] [2019-12-27 19:20:03,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470909948] [2019-12-27 19:20:03,899 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:03,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:03,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:04,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:04,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:04,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1959554480] [2019-12-27 19:20:04,388 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:04,389 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:04,392 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 19:20:04,392 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:04,392 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:04,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:04,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:04,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:04,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:04,393 INFO L87 Difference]: Start difference. First operand 127 states and 294 transitions. Second operand 10 states. [2019-12-27 19:20:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:04,691 INFO L93 Difference]: Finished difference Result 171 states and 369 transitions. [2019-12-27 19:20:04,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:04,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:04,692 INFO L225 Difference]: With dead ends: 171 [2019-12-27 19:20:04,693 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 19:20:04,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:04,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 19:20:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 124. [2019-12-27 19:20:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 19:20:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 282 transitions. [2019-12-27 19:20:04,698 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 282 transitions. Word has length 14 [2019-12-27 19:20:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:04,698 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 282 transitions. [2019-12-27 19:20:04,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 282 transitions. [2019-12-27 19:20:04,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:04,699 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:04,699 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:04,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:04,903 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:04,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:04,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1087145971, now seen corresponding path program 146 times [2019-12-27 19:20:04,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:04,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36643310] [2019-12-27 19:20:04,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:04,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36643310] [2019-12-27 19:20:04,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949010498] [2019-12-27 19:20:04,982 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:05,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:05,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:05,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:05,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:05,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:05,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:05,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1441867226] [2019-12-27 19:20:05,149 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:05,150 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:05,152 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:05,152 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:05,152 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:05,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:05,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:05,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:05,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:05,153 INFO L87 Difference]: Start difference. First operand 124 states and 282 transitions. Second operand 10 states. [2019-12-27 19:20:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:05,368 INFO L93 Difference]: Finished difference Result 159 states and 336 transitions. [2019-12-27 19:20:05,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:05,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:05,369 INFO L225 Difference]: With dead ends: 159 [2019-12-27 19:20:05,369 INFO L226 Difference]: Without dead ends: 158 [2019-12-27 19:20:05,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-12-27 19:20:05,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 127. [2019-12-27 19:20:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 19:20:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 285 transitions. [2019-12-27 19:20:05,372 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 285 transitions. Word has length 14 [2019-12-27 19:20:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:05,372 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 285 transitions. [2019-12-27 19:20:05,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 285 transitions. [2019-12-27 19:20:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:05,373 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:05,373 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:05,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:05,574 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:05,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:05,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1087146064, now seen corresponding path program 147 times [2019-12-27 19:20:05,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:05,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825953103] [2019-12-27 19:20:05,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:05,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825953103] [2019-12-27 19:20:05,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362217494] [2019-12-27 19:20:05,658 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:05,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:20:05,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:05,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:05,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:05,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:05,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:05,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1319939534] [2019-12-27 19:20:05,822 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:05,823 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:05,825 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:05,825 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:05,825 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:05,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:05,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:05,825 INFO L87 Difference]: Start difference. First operand 127 states and 285 transitions. Second operand 10 states. [2019-12-27 19:20:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:06,086 INFO L93 Difference]: Finished difference Result 171 states and 363 transitions. [2019-12-27 19:20:06,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:06,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:06,087 INFO L225 Difference]: With dead ends: 171 [2019-12-27 19:20:06,087 INFO L226 Difference]: Without dead ends: 170 [2019-12-27 19:20:06,088 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-12-27 19:20:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 131. [2019-12-27 19:20:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:06,091 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:06,091 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:06,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:06,092 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:06,092 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:06,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:06,292 INFO L410 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1087148854, now seen corresponding path program 148 times [2019-12-27 19:20:06,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:06,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462203556] [2019-12-27 19:20:06,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:06,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462203556] [2019-12-27 19:20:06,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645744644] [2019-12-27 19:20:06,377 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:06,420 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:20:06,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:06,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:06,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:08,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:08,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:08,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [964444251] [2019-12-27 19:20:08,094 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:08,095 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:08,098 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:08,098 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:08,098 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:08,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:08,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:08,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:08,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:08,099 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:09,112 INFO L93 Difference]: Finished difference Result 178 states and 379 transitions. [2019-12-27 19:20:09,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:20:09,113 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:09,113 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:09,113 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:09,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:20:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:09,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 19:20:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:09,117 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:09,117 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:09,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:09,117 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:09,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:09,118 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:09,118 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:09,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:09,318 INFO L410 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:09,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1087148947, now seen corresponding path program 149 times [2019-12-27 19:20:09,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:09,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827583663] [2019-12-27 19:20:09,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:09,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827583663] [2019-12-27 19:20:09,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633088649] [2019-12-27 19:20:09,449 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:09,491 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:20:09,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:09,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:09,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:09,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:09,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:09,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1773533369] [2019-12-27 19:20:09,621 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:09,622 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:09,624 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:09,624 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:09,624 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:09,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:09,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:09,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:09,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:09,625 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:09,873 INFO L93 Difference]: Finished difference Result 178 states and 379 transitions. [2019-12-27 19:20:09,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:09,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:09,874 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:09,875 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:09,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-27 19:20:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:09,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:09,878 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:09,878 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:09,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:09,879 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:09,879 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:10,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:10,082 INFO L410 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:10,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1087235344, now seen corresponding path program 150 times [2019-12-27 19:20:10,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:10,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101151185] [2019-12-27 19:20:10,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:10,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101151185] [2019-12-27 19:20:10,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460567399] [2019-12-27 19:20:10,228 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:10,294 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:20:10,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:10,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:10,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:11,960 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 19:20:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:11,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:11,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:11,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [714733610] [2019-12-27 19:20:11,961 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:11,962 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:11,964 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:11,964 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:11,964 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:11,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:11,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:11,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:11,965 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:13,123 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2019-12-27 19:20:13,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:20:13,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:13,124 INFO L225 Difference]: With dead ends: 179 [2019-12-27 19:20:13,124 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 19:20:13,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=195, Invalid=506, Unknown=1, NotChecked=0, Total=702 [2019-12-27 19:20:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 19:20:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 130. [2019-12-27 19:20:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:13,127 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:13,127 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:13,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:13,128 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:13,128 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:13,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:13,329 INFO L410 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:13,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1087235437, now seen corresponding path program 151 times [2019-12-27 19:20:13,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:13,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957347287] [2019-12-27 19:20:13,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:13,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957347287] [2019-12-27 19:20:13,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190934824] [2019-12-27 19:20:13,413 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:13,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:13,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:14,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:14,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:14,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1131666466] [2019-12-27 19:20:14,929 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:14,929 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:14,931 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:14,931 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:14,931 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:14,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:14,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:14,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:14,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:20:14,932 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:18,001 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:20:18,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:20:18,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:18,002 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:20:18,002 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:20:18,003 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=193, Invalid=502, Unknown=7, NotChecked=0, Total=702 [2019-12-27 19:20:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:20:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2019-12-27 19:20:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:18,006 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:18,006 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:18,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:18,006 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:18,007 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:18,007 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:18,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:18,207 INFO L410 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1087238227, now seen corresponding path program 152 times [2019-12-27 19:20:18,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:18,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228021147] [2019-12-27 19:20:18,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:18,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228021147] [2019-12-27 19:20:18,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787420738] [2019-12-27 19:20:18,291 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:18,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:18,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:18,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:18,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:19,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:19,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:19,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1391642903] [2019-12-27 19:20:19,579 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:19,580 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:19,582 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:19,582 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:19,582 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:19,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:19,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:19,582 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:21,497 INFO L93 Difference]: Finished difference Result 183 states and 390 transitions. [2019-12-27 19:20:21,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:20:21,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:21,498 INFO L225 Difference]: With dead ends: 183 [2019-12-27 19:20:21,498 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 19:20:21,498 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=193, Invalid=506, Unknown=3, NotChecked=0, Total=702 [2019-12-27 19:20:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 19:20:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2019-12-27 19:20:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:21,501 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:21,501 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:21,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:21,502 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:21,502 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:21,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:21,703 INFO L410 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1087238320, now seen corresponding path program 153 times [2019-12-27 19:20:21,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:21,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407076204] [2019-12-27 19:20:21,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:21,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407076204] [2019-12-27 19:20:21,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715354219] [2019-12-27 19:20:21,784 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:21,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:20:21,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:21,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:21,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:21,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:21,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:21,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1966130385] [2019-12-27 19:20:21,960 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:21,961 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:21,963 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:21,963 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:21,963 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:21,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:21,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:21,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:21,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:21,963 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:22,191 INFO L93 Difference]: Finished difference Result 180 states and 384 transitions. [2019-12-27 19:20:22,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:22,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:22,192 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:20:22,192 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:20:22,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:22,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:20:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2019-12-27 19:20:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 19:20:22,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 19:20:22,195 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 19:20:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:22,196 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 19:20:22,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:22,196 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 19:20:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:22,196 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:22,197 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:22,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:22,400 INFO L410 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:22,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916534, now seen corresponding path program 154 times [2019-12-27 19:20:22,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:22,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784997627] [2019-12-27 19:20:22,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:22,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784997627] [2019-12-27 19:20:22,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565494616] [2019-12-27 19:20:22,501 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:22,553 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:20:22,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:22,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:22,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:22,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:22,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:22,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [432227089] [2019-12-27 19:20:22,785 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:22,786 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:22,789 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:22,789 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:22,789 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:22,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:22,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:22,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:22,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:22,790 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 19:20:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:23,120 INFO L93 Difference]: Finished difference Result 177 states and 378 transitions. [2019-12-27 19:20:23,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:23,120 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:23,121 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:20:23,121 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:20:23,121 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:20:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:20:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 129. [2019-12-27 19:20:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 19:20:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 19:20:23,123 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 19:20:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:23,124 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 19:20:23,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 19:20:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:23,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:23,124 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:23,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:23,325 INFO L410 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1089916627, now seen corresponding path program 155 times [2019-12-27 19:20:23,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:23,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350844851] [2019-12-27 19:20:23,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:23,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350844851] [2019-12-27 19:20:23,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804935128] [2019-12-27 19:20:23,451 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:23,523 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:20:23,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:23,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:23,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:30,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:30,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:30,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [155966079] [2019-12-27 19:20:30,306 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:30,307 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:30,309 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:30,310 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:30,310 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:30,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:30,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:30,311 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 19:20:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:33,025 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 19:20:33,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:33,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:33,027 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:33,027 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:33,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=176, Invalid=472, Unknown=2, NotChecked=0, Total=650 [2019-12-27 19:20:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 19:20:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:33,030 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:33,030 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:33,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:33,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:33,031 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:33,031 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:33,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:33,232 INFO L410 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:33,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919417, now seen corresponding path program 156 times [2019-12-27 19:20:33,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:33,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245200993] [2019-12-27 19:20:33,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:33,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245200993] [2019-12-27 19:20:33,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995371341] [2019-12-27 19:20:33,314 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:33,355 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:20:33,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:33,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:33,356 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:34,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:34,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:34,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [874052844] [2019-12-27 19:20:34,389 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:34,390 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:34,391 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:34,392 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:34,392 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:34,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:34,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:34,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:34,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:34,392 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:35,262 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:20:35,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:35,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:35,263 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:20:35,263 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:20:35,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=180, Invalid=469, Unknown=1, NotChecked=0, Total=650 [2019-12-27 19:20:35,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:20:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2019-12-27 19:20:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:35,266 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:35,267 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:35,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:35,267 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:35,267 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:35,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:35,468 INFO L410 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:35,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1089919510, now seen corresponding path program 157 times [2019-12-27 19:20:35,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:35,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822102559] [2019-12-27 19:20:35,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:35,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822102559] [2019-12-27 19:20:35,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315943940] [2019-12-27 19:20:35,552 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:35,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:35,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:36,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:36,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:36,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [274951209] [2019-12-27 19:20:36,114 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:36,115 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:36,117 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:36,117 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:36,117 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:36,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:36,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:36,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:36,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:36,117 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:37,709 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 19:20:37,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:37,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:37,710 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:37,711 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:37,711 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=181, Invalid=467, Unknown=2, NotChecked=0, Total=650 [2019-12-27 19:20:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-27 19:20:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:37,714 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:37,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:37,714 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:37,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:37,714 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:37,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:37,714 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:37,714 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:37,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:37,915 INFO L410 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:37,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:37,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1090005907, now seen corresponding path program 158 times [2019-12-27 19:20:37,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:37,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922422482] [2019-12-27 19:20:37,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:37,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922422482] [2019-12-27 19:20:37,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750039900] [2019-12-27 19:20:37,999 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:38,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:38,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:38,042 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:38,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:38,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:38,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:38,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [14779280] [2019-12-27 19:20:38,231 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:38,232 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:38,234 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:38,234 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:38,234 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:38,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:38,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:38,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:38,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:38,235 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:38,561 INFO L93 Difference]: Finished difference Result 184 states and 394 transitions. [2019-12-27 19:20:38,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:38,562 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:38,563 INFO L225 Difference]: With dead ends: 184 [2019-12-27 19:20:38,563 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 19:20:38,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:20:38,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 19:20:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 130. [2019-12-27 19:20:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:38,567 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:38,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:38,567 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:38,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:38,567 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:38,567 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:38,567 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:38,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:38,771 INFO L410 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:38,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:38,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1090006000, now seen corresponding path program 159 times [2019-12-27 19:20:38,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:38,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131421510] [2019-12-27 19:20:38,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:38,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131421510] [2019-12-27 19:20:38,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024260343] [2019-12-27 19:20:38,855 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:38,903 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:20:38,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:38,904 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:38,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:39,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:39,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:39,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1499714956] [2019-12-27 19:20:39,124 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:39,125 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:39,126 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:39,127 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:39,127 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:39,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:39,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:39,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:39,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:39,127 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:39,492 INFO L93 Difference]: Finished difference Result 183 states and 393 transitions. [2019-12-27 19:20:39,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:20:39,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:39,493 INFO L225 Difference]: With dead ends: 183 [2019-12-27 19:20:39,493 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 19:20:39,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:20:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 19:20:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2019-12-27 19:20:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:39,496 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:39,496 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:39,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:39,497 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:39,497 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:39,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:39,698 INFO L410 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:39,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1090008790, now seen corresponding path program 160 times [2019-12-27 19:20:39,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:39,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59588249] [2019-12-27 19:20:39,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:39,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59588249] [2019-12-27 19:20:39,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620244508] [2019-12-27 19:20:39,782 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:39,830 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:20:39,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:39,831 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:39,832 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:40,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:40,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:40,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [425486478] [2019-12-27 19:20:40,126 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:40,127 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:40,129 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:40,129 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:40,129 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:40,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:40,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:40,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:40,130 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:40,451 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:20:40,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:40,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:40,452 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:20:40,452 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:20:40,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:20:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:20:40,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2019-12-27 19:20:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:40,456 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:40,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:40,456 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:40,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:40,457 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:40,457 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:40,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:40,660 INFO L410 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:40,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1090008883, now seen corresponding path program 161 times [2019-12-27 19:20:40,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:40,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267776233] [2019-12-27 19:20:40,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:40,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267776233] [2019-12-27 19:20:40,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275175347] [2019-12-27 19:20:40,771 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:40,828 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 19:20:40,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:40,830 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:40,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:41,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:41,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:41,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1528229218] [2019-12-27 19:20:41,083 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:41,084 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:41,088 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:41,088 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:41,088 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:41,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:41,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:41,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:41,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:41,089 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:41,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:41,434 INFO L93 Difference]: Finished difference Result 176 states and 377 transitions. [2019-12-27 19:20:41,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:41,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:41,436 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:20:41,436 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:20:41,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:41,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:20:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 128. [2019-12-27 19:20:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 19:20:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 19:20:41,440 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 19:20:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:41,441 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 19:20:41,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 19:20:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:41,441 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:41,442 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:41,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:41,645 INFO L410 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1173033424, now seen corresponding path program 162 times [2019-12-27 19:20:41,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:41,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407468967] [2019-12-27 19:20:41,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:41,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407468967] [2019-12-27 19:20:41,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264884517] [2019-12-27 19:20:41,738 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:41,778 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:20:41,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:41,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:41,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:41,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:41,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:41,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [442417643] [2019-12-27 19:20:41,894 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:41,895 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:41,897 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:41,897 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:41,897 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:41,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:41,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:41,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:41,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:41,898 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 19:20:42,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:42,119 INFO L93 Difference]: Finished difference Result 179 states and 383 transitions. [2019-12-27 19:20:42,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:42,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:42,120 INFO L225 Difference]: With dead ends: 179 [2019-12-27 19:20:42,120 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 19:20:42,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 19:20:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 128. [2019-12-27 19:20:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 19:20:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 289 transitions. [2019-12-27 19:20:42,123 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 289 transitions. Word has length 14 [2019-12-27 19:20:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:42,123 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 289 transitions. [2019-12-27 19:20:42,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 289 transitions. [2019-12-27 19:20:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:42,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:42,124 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:42,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:42,325 INFO L410 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:42,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1173033517, now seen corresponding path program 163 times [2019-12-27 19:20:42,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:42,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47768968] [2019-12-27 19:20:42,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:42,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47768968] [2019-12-27 19:20:42,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391678609] [2019-12-27 19:20:42,411 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:42,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:42,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:42,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:42,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:42,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1760950285] [2019-12-27 19:20:42,569 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:42,570 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:42,572 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:42,572 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:42,573 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:42,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:42,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:42,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:42,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:42,573 INFO L87 Difference]: Start difference. First operand 128 states and 289 transitions. Second operand 10 states. [2019-12-27 19:20:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:42,853 INFO L93 Difference]: Finished difference Result 176 states and 383 transitions. [2019-12-27 19:20:42,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:42,854 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:42,854 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:20:42,854 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:20:42,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:42,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:20:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 131. [2019-12-27 19:20:42,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:42,858 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:42,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:42,858 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:42,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:42,859 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:42,859 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:43,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:43,059 INFO L410 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:43,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:43,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1173036307, now seen corresponding path program 164 times [2019-12-27 19:20:43,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:43,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056709669] [2019-12-27 19:20:43,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:43,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056709669] [2019-12-27 19:20:43,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671741959] [2019-12-27 19:20:43,171 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:43,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:43,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:43,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:43,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:43,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:43,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:43,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1445128982] [2019-12-27 19:20:43,511 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:43,512 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:43,516 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:43,516 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:43,516 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:43,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:43,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:43,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:43,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:43,517 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:43,839 INFO L93 Difference]: Finished difference Result 177 states and 384 transitions. [2019-12-27 19:20:43,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:43,840 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:43,840 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:20:43,840 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:20:43,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:20:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2019-12-27 19:20:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:43,843 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:43,843 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:43,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:43,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:43,846 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:43,846 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:44,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:44,049 INFO L410 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:44,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1173036400, now seen corresponding path program 165 times [2019-12-27 19:20:44,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:44,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089825299] [2019-12-27 19:20:44,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:44,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089825299] [2019-12-27 19:20:44,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566782903] [2019-12-27 19:20:44,141 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:44,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:20:44,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:44,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:44,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:44,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:44,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:44,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [631887008] [2019-12-27 19:20:44,313 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:44,314 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:44,315 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:44,315 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:44,316 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:44,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:44,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:44,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:44,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:44,316 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:44,586 INFO L93 Difference]: Finished difference Result 176 states and 383 transitions. [2019-12-27 19:20:44,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:44,586 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:44,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:44,587 INFO L225 Difference]: With dead ends: 176 [2019-12-27 19:20:44,587 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 19:20:44,587 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 19:20:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 130. [2019-12-27 19:20:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:44,590 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:44,591 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:44,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:44,591 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:44,591 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:44,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:44,792 INFO L410 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:44,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1173122797, now seen corresponding path program 166 times [2019-12-27 19:20:44,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:44,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863135104] [2019-12-27 19:20:44,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:44,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863135104] [2019-12-27 19:20:44,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627031577] [2019-12-27 19:20:44,878 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:44,917 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:20:44,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:44,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:44,919 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:45,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:45,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:45,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1895816335] [2019-12-27 19:20:45,039 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:45,040 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:45,042 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:45,042 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:45,042 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:45,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:45,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:45,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:45,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:45,043 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:45,288 INFO L93 Difference]: Finished difference Result 179 states and 386 transitions. [2019-12-27 19:20:45,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:45,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:45,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:45,290 INFO L225 Difference]: With dead ends: 179 [2019-12-27 19:20:45,290 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 19:20:45,290 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:45,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 19:20:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 130. [2019-12-27 19:20:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:45,293 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:45,293 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:45,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:45,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:45,294 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:45,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:45,495 INFO L410 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1173122890, now seen corresponding path program 167 times [2019-12-27 19:20:45,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:45,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748272190] [2019-12-27 19:20:45,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:45,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748272190] [2019-12-27 19:20:45,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181473340] [2019-12-27 19:20:45,581 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:45,621 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:20:45,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:45,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:45,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:45,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:45,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:45,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1067542065] [2019-12-27 19:20:45,784 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:45,785 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:45,789 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:45,789 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:45,789 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:45,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:45,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:45,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:45,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:45,790 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:46,157 INFO L93 Difference]: Finished difference Result 172 states and 376 transitions. [2019-12-27 19:20:46,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:46,158 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:46,158 INFO L225 Difference]: With dead ends: 172 [2019-12-27 19:20:46,159 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 19:20:46,159 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:46,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 19:20:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 131. [2019-12-27 19:20:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:46,162 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:46,163 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:46,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:46,164 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:46,164 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:46,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:46,365 INFO L410 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:46,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1173125680, now seen corresponding path program 168 times [2019-12-27 19:20:46,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:46,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602550932] [2019-12-27 19:20:46,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:46,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602550932] [2019-12-27 19:20:46,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108992845] [2019-12-27 19:20:46,444 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:46,485 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:20:46,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:46,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:46,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:46,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:46,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:46,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [760812518] [2019-12-27 19:20:46,608 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:46,609 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:46,611 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:46,611 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:46,611 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:46,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:46,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:46,612 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:46,892 INFO L93 Difference]: Finished difference Result 175 states and 379 transitions. [2019-12-27 19:20:46,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:46,892 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:46,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:46,893 INFO L225 Difference]: With dead ends: 175 [2019-12-27 19:20:46,893 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 19:20:46,894 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 19:20:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2019-12-27 19:20:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:46,896 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:46,897 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:46,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:46,897 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:46,898 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:47,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:47,098 INFO L410 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1173125773, now seen corresponding path program 169 times [2019-12-27 19:20:47,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:47,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929208410] [2019-12-27 19:20:47,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:47,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929208410] [2019-12-27 19:20:47,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720623639] [2019-12-27 19:20:47,183 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:47,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:47,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:47,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:47,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:47,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [193173978] [2019-12-27 19:20:47,340 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:47,341 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:47,342 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:47,343 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:47,343 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:47,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:47,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:47,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:47,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:47,343 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:47,580 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 19:20:47,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:47,580 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:47,581 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:20:47,581 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:20:47,581 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:20:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 129. [2019-12-27 19:20:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 19:20:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 19:20:47,584 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 19:20:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:47,584 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 19:20:47,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 19:20:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:47,585 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:47,585 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:47,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:47,786 INFO L410 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:47,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1175803987, now seen corresponding path program 170 times [2019-12-27 19:20:47,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:47,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367307274] [2019-12-27 19:20:47,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:47,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367307274] [2019-12-27 19:20:47,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696434653] [2019-12-27 19:20:47,871 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:47,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:47,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:47,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:47,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:48,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:48,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:48,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1832281261] [2019-12-27 19:20:48,086 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:48,087 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:48,089 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:48,089 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:48,089 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:48,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:48,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:48,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:48,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:48,090 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 19:20:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:48,327 INFO L93 Difference]: Finished difference Result 182 states and 389 transitions. [2019-12-27 19:20:48,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:48,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:48,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:48,328 INFO L225 Difference]: With dead ends: 182 [2019-12-27 19:20:48,328 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 19:20:48,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 19:20:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 129. [2019-12-27 19:20:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 19:20:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 293 transitions. [2019-12-27 19:20:48,331 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 293 transitions. Word has length 14 [2019-12-27 19:20:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:48,332 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 293 transitions. [2019-12-27 19:20:48,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 293 transitions. [2019-12-27 19:20:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:48,333 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:48,333 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:48,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:48,535 INFO L410 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:48,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1175804080, now seen corresponding path program 171 times [2019-12-27 19:20:48,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:48,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924198474] [2019-12-27 19:20:48,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:48,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924198474] [2019-12-27 19:20:48,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286385789] [2019-12-27 19:20:48,651 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:48,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:20:48,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:48,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:48,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:49,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:49,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:49,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [832110316] [2019-12-27 19:20:49,811 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:49,811 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:49,813 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:49,813 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:49,813 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:49,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:49,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:49,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:49,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:20:49,814 INFO L87 Difference]: Start difference. First operand 129 states and 293 transitions. Second operand 10 states. [2019-12-27 19:20:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:51,135 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 19:20:51,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:51,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:51,137 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:51,137 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:51,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=164, Invalid=435, Unknown=1, NotChecked=0, Total=600 [2019-12-27 19:20:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:51,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 19:20:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:51,140 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:51,140 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:51,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:51,141 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:51,141 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:51,141 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:51,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:51,342 INFO L410 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:51,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:51,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1175806870, now seen corresponding path program 172 times [2019-12-27 19:20:51,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:51,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039807009] [2019-12-27 19:20:51,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:51,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039807009] [2019-12-27 19:20:51,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559143296] [2019-12-27 19:20:51,432 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:51,478 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:20:51,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:51,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:51,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:52,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:52,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:52,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1173482644] [2019-12-27 19:20:52,736 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:52,736 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:52,739 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:52,740 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:52,740 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:52,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:52,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2019-12-27 19:20:52,741 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:53,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:53,858 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 19:20:53,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:53,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:53,859 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:53,859 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:53,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=164, Invalid=433, Unknown=3, NotChecked=0, Total=600 [2019-12-27 19:20:53,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:53,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 131. [2019-12-27 19:20:53,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:53,862 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:53,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:53,863 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:53,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:53,863 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:53,863 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:53,864 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:54,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:54,064 INFO L410 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1175806963, now seen corresponding path program 173 times [2019-12-27 19:20:54,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:54,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491367871] [2019-12-27 19:20:54,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:54,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491367871] [2019-12-27 19:20:54,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898580821] [2019-12-27 19:20:54,167 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:54,246 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:20:54,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:54,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:54,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:54,654 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 19:20:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:55,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:55,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:55,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1628860149] [2019-12-27 19:20:55,602 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:55,603 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:55,605 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:55,605 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:55,605 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:55,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:55,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:55,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:55,605 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:56,267 INFO L93 Difference]: Finished difference Result 178 states and 385 transitions. [2019-12-27 19:20:56,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:56,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:56,268 INFO L225 Difference]: With dead ends: 178 [2019-12-27 19:20:56,268 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 19:20:56,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=165, Invalid=434, Unknown=1, NotChecked=0, Total=600 [2019-12-27 19:20:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 19:20:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-27 19:20:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:56,270 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:56,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:56,270 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:56,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:56,271 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:56,271 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:56,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:56,472 INFO L410 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:56,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893360, now seen corresponding path program 174 times [2019-12-27 19:20:56,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:56,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302951222] [2019-12-27 19:20:56,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:56,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302951222] [2019-12-27 19:20:56,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629874263] [2019-12-27 19:20:56,556 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:56,603 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 19:20:56,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:56,604 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:56,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:56,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:56,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:56,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [449636394] [2019-12-27 19:20:56,738 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:56,739 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:56,741 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:56,741 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:56,741 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:56,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:56,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:56,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:56,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:56,742 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:57,008 INFO L93 Difference]: Finished difference Result 180 states and 387 transitions. [2019-12-27 19:20:57,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:57,008 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:57,009 INFO L225 Difference]: With dead ends: 180 [2019-12-27 19:20:57,009 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 19:20:57,009 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 19:20:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 130. [2019-12-27 19:20:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 19:20:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 297 transitions. [2019-12-27 19:20:57,012 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 297 transitions. Word has length 14 [2019-12-27 19:20:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:57,013 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 297 transitions. [2019-12-27 19:20:57,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 297 transitions. [2019-12-27 19:20:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:57,013 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:57,013 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:57,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:57,214 INFO L410 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:57,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893453, now seen corresponding path program 175 times [2019-12-27 19:20:57,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:57,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040306076] [2019-12-27 19:20:57,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:57,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040306076] [2019-12-27 19:20:57,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513634760] [2019-12-27 19:20:57,300 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:57,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:57,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:57,960 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_592 Int)) (and (<= c_~j~0 (+ v_~i~0_592 3)) (<= (div (+ (* v_~i~0_592 (- 1)) 2) (- 3)) 3) (<= c_~i~0 (+ c_~j~0 v_~i~0_592)))) is different from true [2019-12-27 19:20:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:57,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:57,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:57,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1903488922] [2019-12-27 19:20:57,961 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:57,961 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:57,963 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:57,963 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:57,963 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:57,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:57,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=205, Unknown=1, NotChecked=30, Total=306 [2019-12-27 19:20:57,964 INFO L87 Difference]: Start difference. First operand 130 states and 297 transitions. Second operand 10 states. [2019-12-27 19:20:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:58,273 INFO L93 Difference]: Finished difference Result 177 states and 384 transitions. [2019-12-27 19:20:58,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:20:58,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:58,274 INFO L225 Difference]: With dead ends: 177 [2019-12-27 19:20:58,274 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 19:20:58,274 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=433, Unknown=1, NotChecked=46, Total=650 [2019-12-27 19:20:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 19:20:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2019-12-27 19:20:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:58,277 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:58,277 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:58,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:58,278 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:58,278 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:58,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:58,481 INFO L410 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:58,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:58,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1175896243, now seen corresponding path program 176 times [2019-12-27 19:20:58,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:58,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254639954] [2019-12-27 19:20:58,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:58,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254639954] [2019-12-27 19:20:58,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043843195] [2019-12-27 19:20:58,591 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:58,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:20:58,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:58,641 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:58,642 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:58,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:58,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:58,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [894503325] [2019-12-27 19:20:58,756 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:58,757 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:58,759 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:58,759 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:58,759 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:58,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:58,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:58,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:58,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:58,760 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. [2019-12-27 19:20:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:20:59,021 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2019-12-27 19:20:59,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:20:59,022 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:20:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:20:59,022 INFO L225 Difference]: With dead ends: 174 [2019-12-27 19:20:59,022 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 19:20:59,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:20:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 19:20:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 131. [2019-12-27 19:20:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 19:20:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 301 transitions. [2019-12-27 19:20:59,026 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 301 transitions. Word has length 14 [2019-12-27 19:20:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:20:59,026 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 301 transitions. [2019-12-27 19:20:59,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:20:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 301 transitions. [2019-12-27 19:20:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:20:59,027 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:20:59,027 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:20:59,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:59,230 INFO L410 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:20:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:20:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1175896336, now seen corresponding path program 177 times [2019-12-27 19:20:59,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:20:59,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448871257] [2019-12-27 19:20:59,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:20:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:20:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:59,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448871257] [2019-12-27 19:20:59,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442627009] [2019-12-27 19:20:59,311 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:59,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 19:20:59,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:20:59,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:20:59,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:20:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:20:59,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:20:59,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 19:20:59,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1983566778] [2019-12-27 19:20:59,485 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:20:59,486 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:20:59,487 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:20:59,488 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:20:59,488 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:20:59,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:20:59,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:20:59,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:20:59,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:20:59,489 INFO L87 Difference]: Start difference. First operand 131 states and 301 transitions. Second operand 10 states. Received shutdown request... [2019-12-27 19:20:59,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-27 19:20:59,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:20:59,703 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 19:20:59,706 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 19:20:59,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 07:20:59 BasicIcfg [2019-12-27 19:20:59,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 19:20:59,708 INFO L168 Benchmark]: Toolchain (without parser) took 288126.59 ms. Allocated memory was 145.8 MB in the beginning and 205.0 MB in the end (delta: 59.2 MB). Free memory was 101.2 MB in the beginning and 131.8 MB in the end (delta: -30.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2019-12-27 19:20:59,708 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-27 19:20:59,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 600.79 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 100.7 MB in the beginning and 161.3 MB in the end (delta: -60.5 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-12-27 19:20:59,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.32 ms. Allocated memory is still 203.4 MB. Free memory was 161.3 MB in the beginning and 159.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 19:20:59,709 INFO L168 Benchmark]: Boogie Preprocessor took 28.17 ms. Allocated memory is still 203.4 MB. Free memory was 159.3 MB in the beginning and 158.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-27 19:20:59,709 INFO L168 Benchmark]: RCFGBuilder took 446.46 ms. Allocated memory is still 203.4 MB. Free memory was 158.0 MB in the beginning and 138.2 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2019-12-27 19:20:59,709 INFO L168 Benchmark]: TraceAbstraction took 286997.42 ms. Allocated memory was 203.4 MB in the beginning and 205.0 MB in the end (delta: 1.6 MB). Free memory was 137.5 MB in the beginning and 131.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 7.1 GB. [2019-12-27 19:20:59,711 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 600.79 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 100.7 MB in the beginning and 161.3 MB in the end (delta: -60.5 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 48.32 ms. Allocated memory is still 203.4 MB. Free memory was 161.3 MB in the beginning and 159.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.17 ms. Allocated memory is still 203.4 MB. Free memory was 159.3 MB in the beginning and 158.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 446.46 ms. Allocated memory is still 203.4 MB. Free memory was 158.0 MB in the beginning and 138.2 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 286997.42 ms. Allocated memory was 203.4 MB in the beginning and 205.0 MB in the end (delta: 1.6 MB). Free memory was 137.5 MB in the beginning and 131.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 441 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 695 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (131states) and FLOYD_HOARE automaton (currently 2 states, 10 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 18 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 286.8s, OverallIterations: 193, TraceHistogramMax: 8, AutomataDifference: 107.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1729 SDtfs, 18521 SDslu, 9146 SDs, 0 SdLazy, 4818 SolverSat, 2702 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4748 GetRequests, 1026 SyntacticMatches, 0 SemanticMatches, 3721 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 10463 ImplicationChecksByTransitivity, 223.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 192 MinimizatonAttempts, 6410 StatesRemovedByMinimization, 191 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 127.6s InterpolantComputationTime, 4841 NumberOfCodeBlocks, 4841 NumberOfCodeBlocksAsserted, 637 NumberOfCheckSat, 4460 ConstructedInterpolants, 178 QuantifiedInterpolants, 675553 SizeOfPredicates, 4 NumberOfNonLiveVariables, 17449 ConjunctsInSsa, 2053 ConjunctsInUnsatCore, 381 InterpolantComputations, 5 PerfectInterpolantSequences, 0/2846 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown